From fb7d414a54c5e16d1471a01d79af509bee4e51af Mon Sep 17 00:00:00 2001
From: Jack Bates <jack@nottheoilrig.com>
Date: Tue, 27 Aug 2019 11:03:07 -0700
Subject: [PATCH] Better typings for Promise.then(), like #31117

---
 src/lib/es5.d.ts                              |   6 +-
 .../asyncFunctionDeclaration15_es5.errors.txt |   8 +-
 ...ionEmitExportAliasVisibiilityMarking.types |   4 +-
 .../reference/esModuleInteropImportCall.types |   4 +-
 .../reference/genericFunctionInference1.types |   4 +-
 .../importCallExpression1ESNext.types         |   4 +-
 .../importCallExpression2ESNext.types         |   4 +-
 .../importCallExpression4ESNext.types         |   4 +-
 .../importCallExpressionES5AMD.types          |   4 +-
 .../importCallExpressionES5CJS.types          |   4 +-
 .../importCallExpressionES5System.types       |   4 +-
 .../importCallExpressionES5UMD.types          |   4 +-
 .../importCallExpressionES6AMD.types          |   4 +-
 .../importCallExpressionES6CJS.types          |   4 +-
 .../importCallExpressionES6System.types       |   4 +-
 .../importCallExpressionES6UMD.types          |   4 +-
 .../importCallExpressionErrorInES2015.types   |   4 +-
 .../importCallExpressionInAMD1.types          |   4 +-
 .../importCallExpressionInAMD2.types          |   4 +-
 .../importCallExpressionInAMD4.types          |   8 +-
 .../importCallExpressionInCJS1.types          |   4 +-
 .../importCallExpressionInCJS3.types          |   4 +-
 .../importCallExpressionInCJS5.types          |   8 +-
 .../importCallExpressionInSystem1.types       |   4 +-
 .../importCallExpressionInSystem2.types       |   4 +-
 .../importCallExpressionInSystem4.types       |   8 +-
 .../importCallExpressionInUMD1.types          |   4 +-
 .../importCallExpressionInUMD2.types          |   4 +-
 .../importCallExpressionInUMD4.types          |   8 +-
 ...tCallExpressionNoModuleKindSpecified.types |   4 +-
 ...portCallExpressionReturnPromiseOfAny.types |   4 +-
 ...mportCallExpressionShouldNotGetParen.types |   8 +-
 ...xpressionSpecifierNotStringTypeError.types |   4 +-
 .../baselines/reference/inferenceLimit.types  |   8 +-
 .../instantiateContextualTypes.types          |  12 +-
 ...eLibrary_NoErrorDuplicateLibOptions1.types |   4 +-
 ...eLibrary_NoErrorDuplicateLibOptions2.types |   4 +-
 ...dularizeLibrary_TargetES5UsingES6Lib.types |   4 +-
 .../optionalFunctionArgAssignability.types    |   2 +-
 .../reference/promisePermutations.errors.txt  |   4 +-
 .../reference/promisePermutations.types       | 224 ++++----
 .../reference/promisePermutations2.errors.txt |   4 +-
 .../reference/promisePermutations2.types      | 218 ++++----
 .../reference/promisePermutations3.errors.txt |   4 +-
 .../reference/promisePermutations3.types      | 224 ++++----
 tests/baselines/reference/promiseTest.types   |   8 +-
 tests/baselines/reference/promiseType.types   | 488 +++++++++---------
 .../reference/promiseTypeInference.errors.txt |  40 --
 .../reference/promiseTypeInference.types      |  10 +-
 .../reference/promiseTypeStrictNull.types     | 488 +++++++++---------
 .../reference/promiseVoidErrorCallback.types  |   8 +-
 tests/baselines/reference/promises.types      |   4 +-
 .../reference/promisesWithConstraints.types   |   2 +-
 .../reference/specializationError.types       |   2 +-
 ...eticDefaultExportsWithDynamicImports.types |   4 +-
 .../initial-build/resolves-correctly.js       |  12 +-
 .../unionAndIntersectionInference1.types      |   4 +-
 57 files changed, 950 insertions(+), 990 deletions(-)
 delete mode 100644 tests/baselines/reference/promiseTypeInference.errors.txt

diff --git a/src/lib/es5.d.ts b/src/lib/es5.d.ts
index 3eced36c0778d..75cdb8b650158 100644
--- a/src/lib/es5.d.ts
+++ b/src/lib/es5.d.ts
@@ -1370,7 +1370,7 @@ interface PromiseLike<T> {
      * @param onrejected The callback to execute when the Promise is rejected.
      * @returns A Promise for the completion of which ever callback is executed.
      */
-    then<TResult1 = T, TResult2 = never>(onfulfilled?: ((value: T) => TResult1 | PromiseLike<TResult1>) | undefined | null, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | undefined | null): PromiseLike<TResult1 | TResult2>;
+    then<TResult1 = T, TResult2 = never>(onfulfilled?: ((value: T) => TResult1) | undefined | null, onrejected?: ((reason: any) => TResult2) | undefined | null): PromiseLike<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>;
 }
 
 /**
@@ -1383,14 +1383,14 @@ interface Promise<T> {
      * @param onrejected The callback to execute when the Promise is rejected.
      * @returns A Promise for the completion of which ever callback is executed.
      */
-    then<TResult1 = T, TResult2 = never>(onfulfilled?: ((value: T) => TResult1 | PromiseLike<TResult1>) | undefined | null, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | undefined | null): Promise<TResult1 | TResult2>;
+    then<TResult1 = T, TResult2 = never>(onfulfilled?: ((value: T) => TResult1) | undefined | null, onrejected?: ((reason: any) => TResult2) | undefined | null): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>;
 
     /**
      * Attaches a callback for only the rejection of the Promise.
      * @param onrejected The callback to execute when the Promise is rejected.
      * @returns A Promise for the completion of the callback.
      */
-    catch<TResult = never>(onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | undefined | null): Promise<T | TResult>;
+    catch<TResult = never>(onrejected?: ((reason: any) => TResult) | undefined | null): Promise<T | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>;
 }
 
 interface ArrayLike<T> {
diff --git a/tests/baselines/reference/asyncFunctionDeclaration15_es5.errors.txt b/tests/baselines/reference/asyncFunctionDeclaration15_es5.errors.txt
index 6b4b0a71c6fe1..98383b34f4277 100644
--- a/tests/baselines/reference/asyncFunctionDeclaration15_es5.errors.txt
+++ b/tests/baselines/reference/asyncFunctionDeclaration15_es5.errors.txt
@@ -7,8 +7,8 @@ tests/cases/conformance/async/es5/functionDeclarations/asyncFunctionDeclaration1
 tests/cases/conformance/async/es5/functionDeclarations/asyncFunctionDeclaration15_es5.ts(10,23): error TS1055: Type 'typeof Thenable' is not a valid async function return type in ES5/ES3 because it does not refer to a Promise-compatible constructor value.
   Type 'Thenable' is not assignable to type 'PromiseLike<T>'.
     Types of property 'then' are incompatible.
-      Type '() => void' is not assignable to type '<TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => PromiseLike<TResult1 | TResult2>'.
-        Type 'void' is not assignable to type 'PromiseLike<TResult1 | TResult2>'.
+      Type '() => void' is not assignable to type '<TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1, onrejected?: (reason: any) => TResult2) => PromiseLike<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>'.
+        Type 'void' is not assignable to type 'PromiseLike<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>'.
 tests/cases/conformance/async/es5/functionDeclarations/asyncFunctionDeclaration15_es5.ts(17,16): error TS1058: The return type of an async function must either be a valid promise or must not contain a callable 'then' member.
 tests/cases/conformance/async/es5/functionDeclarations/asyncFunctionDeclaration15_es5.ts(23,25): error TS1320: Type of 'await' operand must either be a valid promise or must not contain a callable 'then' member.
 
@@ -40,8 +40,8 @@ tests/cases/conformance/async/es5/functionDeclarations/asyncFunctionDeclaration1
 !!! error TS1055: Type 'typeof Thenable' is not a valid async function return type in ES5/ES3 because it does not refer to a Promise-compatible constructor value.
 !!! error TS1055:   Type 'Thenable' is not assignable to type 'PromiseLike<T>'.
 !!! error TS1055:     Types of property 'then' are incompatible.
-!!! error TS1055:       Type '() => void' is not assignable to type '<TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => PromiseLike<TResult1 | TResult2>'.
-!!! error TS1055:         Type 'void' is not assignable to type 'PromiseLike<TResult1 | TResult2>'.
+!!! error TS1055:       Type '() => void' is not assignable to type '<TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1, onrejected?: (reason: any) => TResult2) => PromiseLike<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>'.
+!!! error TS1055:         Type 'void' is not assignable to type 'PromiseLike<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>'.
     async function fn7() { return; } // valid: Promise<void>
     async function fn8() { return 1; } // valid: Promise<number>
     async function fn9() { return null; } // valid: Promise<any>
diff --git a/tests/baselines/reference/declarationEmitExportAliasVisibiilityMarking.types b/tests/baselines/reference/declarationEmitExportAliasVisibiilityMarking.types
index bf9666f3082b1..29479073a6961 100644
--- a/tests/baselines/reference/declarationEmitExportAliasVisibiilityMarking.types
+++ b/tests/baselines/reference/declarationEmitExportAliasVisibiilityMarking.types
@@ -28,10 +28,10 @@ export let lazyCard = () => import('./Card').then(a => a.default);
 >lazyCard : () => Promise<(suit: import("tests/cases/compiler/Types").Suit, rank: import("tests/cases/compiler/Types").Rank) => { suit: import("tests/cases/compiler/Types").Suit; rank: import("tests/cases/compiler/Types").Rank; }>
 >() => import('./Card').then(a => a.default) : () => Promise<(suit: import("tests/cases/compiler/Types").Suit, rank: import("tests/cases/compiler/Types").Rank) => { suit: import("tests/cases/compiler/Types").Suit; rank: import("tests/cases/compiler/Types").Rank; }>
 >import('./Card').then(a => a.default) : Promise<(suit: import("tests/cases/compiler/Types").Suit, rank: import("tests/cases/compiler/Types").Rank) => { suit: import("tests/cases/compiler/Types").Suit; rank: import("tests/cases/compiler/Types").Rank; }>
->import('./Card').then : <TResult1 = typeof import("tests/cases/compiler/Card"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/compiler/Card")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>import('./Card').then : <TResult1 = typeof import("tests/cases/compiler/Card"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/compiler/Card")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >import('./Card') : Promise<typeof import("tests/cases/compiler/Card")>
 >'./Card' : "./Card"
->then : <TResult1 = typeof import("tests/cases/compiler/Card"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/compiler/Card")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = typeof import("tests/cases/compiler/Card"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/compiler/Card")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >a => a.default : (a: typeof import("tests/cases/compiler/Card")) => (suit: import("tests/cases/compiler/Types").Suit, rank: import("tests/cases/compiler/Types").Rank) => { suit: import("tests/cases/compiler/Types").Suit; rank: import("tests/cases/compiler/Types").Rank; }
 >a : typeof import("tests/cases/compiler/Card")
 >a.default : (suit: import("tests/cases/compiler/Types").Suit, rank: import("tests/cases/compiler/Types").Rank) => { suit: import("tests/cases/compiler/Types").Suit; rank: import("tests/cases/compiler/Types").Rank; }
diff --git a/tests/baselines/reference/esModuleInteropImportCall.types b/tests/baselines/reference/esModuleInteropImportCall.types
index 59d1de3076822..cf708acd0aacf 100644
--- a/tests/baselines/reference/esModuleInteropImportCall.types
+++ b/tests/baselines/reference/esModuleInteropImportCall.types
@@ -9,10 +9,10 @@ export = foo;
 === tests/cases/compiler/index.ts ===
 import("./foo").then(f => {
 >import("./foo").then(f => {    f.default;}) : Promise<void>
->import("./foo").then : <TResult1 = { default: () => void; }, TResult2 = never>(onfulfilled?: (value: { default: () => void; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>import("./foo").then : <TResult1 = { default: () => void; }, TResult2 = never>(onfulfilled?: (value: { default: () => void; }) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >import("./foo") : Promise<{ default: () => void; }>
 >"./foo" : "./foo"
->then : <TResult1 = { default: () => void; }, TResult2 = never>(onfulfilled?: (value: { default: () => void; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = { default: () => void; }, TResult2 = never>(onfulfilled?: (value: { default: () => void; }) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >f => {    f.default;} : (f: { default: () => void; }) => void
 >f : { default: () => void; }
 
diff --git a/tests/baselines/reference/genericFunctionInference1.types b/tests/baselines/reference/genericFunctionInference1.types
index 1974fe17bea80..4563e2be81e87 100644
--- a/tests/baselines/reference/genericFunctionInference1.types
+++ b/tests/baselines/reference/genericFunctionInference1.types
@@ -842,9 +842,9 @@ const promise = Promise.resolve(1);
 
 promise.then(
 >promise.then(    pipe(        x => x + 1,        x => x * 2,    ),) : Promise<number>
->promise.then : <TResult1 = number, TResult2 = never>(onfulfilled?: ((value: number) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>promise.then : <TResult1 = number, TResult2 = never>(onfulfilled?: ((value: number) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >promise : Promise<number>
->then : <TResult1 = number, TResult2 = never>(onfulfilled?: ((value: number) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = number, TResult2 = never>(onfulfilled?: ((value: number) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 
     pipe(
 >pipe(        x => x + 1,        x => x * 2,    ) : (x: number) => number
diff --git a/tests/baselines/reference/importCallExpression1ESNext.types b/tests/baselines/reference/importCallExpression1ESNext.types
index 30fe9acd605ea..25b466b864094 100644
--- a/tests/baselines/reference/importCallExpression1ESNext.types
+++ b/tests/baselines/reference/importCallExpression1ESNext.types
@@ -15,9 +15,9 @@ var p1 = import("./0");
 
 p1.then(zero => {
 >p1.then(zero => {    return zero.foo();}) : Promise<string>
->p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p1 : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
->then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >zero => {    return zero.foo();} : (zero: typeof import("tests/cases/conformance/dynamicImport/0")) => string
 >zero : typeof import("tests/cases/conformance/dynamicImport/0")
 
diff --git a/tests/baselines/reference/importCallExpression2ESNext.types b/tests/baselines/reference/importCallExpression2ESNext.types
index 80580e35d5362..b9c29014a2028 100644
--- a/tests/baselines/reference/importCallExpression2ESNext.types
+++ b/tests/baselines/reference/importCallExpression2ESNext.types
@@ -14,9 +14,9 @@ function foo(x: Promise<any>) {
 
     x.then(value => {
 >x.then(value => {        let b = new value.B();        b.print();    }) : Promise<void>
->x.then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>x.then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >x : Promise<any>
->then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >value => {        let b = new value.B();        b.print();    } : (value: any) => void
 >value : any
 
diff --git a/tests/baselines/reference/importCallExpression4ESNext.types b/tests/baselines/reference/importCallExpression4ESNext.types
index 82ddbf1db6571..94dd71c4ce1c3 100644
--- a/tests/baselines/reference/importCallExpression4ESNext.types
+++ b/tests/baselines/reference/importCallExpression4ESNext.types
@@ -38,11 +38,11 @@ class C {
 
         this.myModule.then(Zero => {
 >this.myModule.then(Zero => {            console.log(Zero.foo());        }, async err => {            console.log(err);            let one = await import("./1");            console.log(one.backup());        }) : Promise<void>
->this.myModule.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>this.myModule.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >this.myModule : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
 >this : this
 >myModule : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
->then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >Zero => {            console.log(Zero.foo());        } : (Zero: typeof import("tests/cases/conformance/dynamicImport/0")) => void
 >Zero : typeof import("tests/cases/conformance/dynamicImport/0")
 
diff --git a/tests/baselines/reference/importCallExpressionES5AMD.types b/tests/baselines/reference/importCallExpressionES5AMD.types
index ceb6a6fe29962..87b4fa917a4b3 100644
--- a/tests/baselines/reference/importCallExpressionES5AMD.types
+++ b/tests/baselines/reference/importCallExpressionES5AMD.types
@@ -15,9 +15,9 @@ var p1 = import("./0");
 
 p1.then(zero => {
 >p1.then(zero => {    return zero.foo();}) : Promise<string>
->p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p1 : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
->then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >zero => {    return zero.foo();} : (zero: typeof import("tests/cases/conformance/dynamicImport/0")) => string
 >zero : typeof import("tests/cases/conformance/dynamicImport/0")
 
diff --git a/tests/baselines/reference/importCallExpressionES5CJS.types b/tests/baselines/reference/importCallExpressionES5CJS.types
index ceb6a6fe29962..87b4fa917a4b3 100644
--- a/tests/baselines/reference/importCallExpressionES5CJS.types
+++ b/tests/baselines/reference/importCallExpressionES5CJS.types
@@ -15,9 +15,9 @@ var p1 = import("./0");
 
 p1.then(zero => {
 >p1.then(zero => {    return zero.foo();}) : Promise<string>
->p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p1 : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
->then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >zero => {    return zero.foo();} : (zero: typeof import("tests/cases/conformance/dynamicImport/0")) => string
 >zero : typeof import("tests/cases/conformance/dynamicImport/0")
 
diff --git a/tests/baselines/reference/importCallExpressionES5System.types b/tests/baselines/reference/importCallExpressionES5System.types
index ceb6a6fe29962..87b4fa917a4b3 100644
--- a/tests/baselines/reference/importCallExpressionES5System.types
+++ b/tests/baselines/reference/importCallExpressionES5System.types
@@ -15,9 +15,9 @@ var p1 = import("./0");
 
 p1.then(zero => {
 >p1.then(zero => {    return zero.foo();}) : Promise<string>
->p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p1 : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
->then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >zero => {    return zero.foo();} : (zero: typeof import("tests/cases/conformance/dynamicImport/0")) => string
 >zero : typeof import("tests/cases/conformance/dynamicImport/0")
 
diff --git a/tests/baselines/reference/importCallExpressionES5UMD.types b/tests/baselines/reference/importCallExpressionES5UMD.types
index ceb6a6fe29962..87b4fa917a4b3 100644
--- a/tests/baselines/reference/importCallExpressionES5UMD.types
+++ b/tests/baselines/reference/importCallExpressionES5UMD.types
@@ -15,9 +15,9 @@ var p1 = import("./0");
 
 p1.then(zero => {
 >p1.then(zero => {    return zero.foo();}) : Promise<string>
->p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p1 : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
->then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >zero => {    return zero.foo();} : (zero: typeof import("tests/cases/conformance/dynamicImport/0")) => string
 >zero : typeof import("tests/cases/conformance/dynamicImport/0")
 
diff --git a/tests/baselines/reference/importCallExpressionES6AMD.types b/tests/baselines/reference/importCallExpressionES6AMD.types
index ceb6a6fe29962..87b4fa917a4b3 100644
--- a/tests/baselines/reference/importCallExpressionES6AMD.types
+++ b/tests/baselines/reference/importCallExpressionES6AMD.types
@@ -15,9 +15,9 @@ var p1 = import("./0");
 
 p1.then(zero => {
 >p1.then(zero => {    return zero.foo();}) : Promise<string>
->p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p1 : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
->then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >zero => {    return zero.foo();} : (zero: typeof import("tests/cases/conformance/dynamicImport/0")) => string
 >zero : typeof import("tests/cases/conformance/dynamicImport/0")
 
diff --git a/tests/baselines/reference/importCallExpressionES6CJS.types b/tests/baselines/reference/importCallExpressionES6CJS.types
index ceb6a6fe29962..87b4fa917a4b3 100644
--- a/tests/baselines/reference/importCallExpressionES6CJS.types
+++ b/tests/baselines/reference/importCallExpressionES6CJS.types
@@ -15,9 +15,9 @@ var p1 = import("./0");
 
 p1.then(zero => {
 >p1.then(zero => {    return zero.foo();}) : Promise<string>
->p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p1 : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
->then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >zero => {    return zero.foo();} : (zero: typeof import("tests/cases/conformance/dynamicImport/0")) => string
 >zero : typeof import("tests/cases/conformance/dynamicImport/0")
 
diff --git a/tests/baselines/reference/importCallExpressionES6System.types b/tests/baselines/reference/importCallExpressionES6System.types
index ceb6a6fe29962..87b4fa917a4b3 100644
--- a/tests/baselines/reference/importCallExpressionES6System.types
+++ b/tests/baselines/reference/importCallExpressionES6System.types
@@ -15,9 +15,9 @@ var p1 = import("./0");
 
 p1.then(zero => {
 >p1.then(zero => {    return zero.foo();}) : Promise<string>
->p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p1 : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
->then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >zero => {    return zero.foo();} : (zero: typeof import("tests/cases/conformance/dynamicImport/0")) => string
 >zero : typeof import("tests/cases/conformance/dynamicImport/0")
 
diff --git a/tests/baselines/reference/importCallExpressionES6UMD.types b/tests/baselines/reference/importCallExpressionES6UMD.types
index ceb6a6fe29962..87b4fa917a4b3 100644
--- a/tests/baselines/reference/importCallExpressionES6UMD.types
+++ b/tests/baselines/reference/importCallExpressionES6UMD.types
@@ -15,9 +15,9 @@ var p1 = import("./0");
 
 p1.then(zero => {
 >p1.then(zero => {    return zero.foo();}) : Promise<string>
->p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p1 : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
->then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >zero => {    return zero.foo();} : (zero: typeof import("tests/cases/conformance/dynamicImport/0")) => string
 >zero : typeof import("tests/cases/conformance/dynamicImport/0")
 
diff --git a/tests/baselines/reference/importCallExpressionErrorInES2015.types b/tests/baselines/reference/importCallExpressionErrorInES2015.types
index f0a055e7a0626..06b90cb346bc3 100644
--- a/tests/baselines/reference/importCallExpressionErrorInES2015.types
+++ b/tests/baselines/reference/importCallExpressionErrorInES2015.types
@@ -15,9 +15,9 @@ var p1 = import("./0");
 
 p1.then(zero => {
 >p1.then(zero => {    return zero.foo();}) : Promise<string>
->p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p1 : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
->then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >zero => {    return zero.foo();} : (zero: typeof import("tests/cases/conformance/dynamicImport/0")) => string
 >zero : typeof import("tests/cases/conformance/dynamicImport/0")
 
diff --git a/tests/baselines/reference/importCallExpressionInAMD1.types b/tests/baselines/reference/importCallExpressionInAMD1.types
index 6d270e686edf2..90531faaac5de 100644
--- a/tests/baselines/reference/importCallExpressionInAMD1.types
+++ b/tests/baselines/reference/importCallExpressionInAMD1.types
@@ -15,9 +15,9 @@ var p1 = import("./0");
 
 p1.then(zero => {
 >p1.then(zero => {    return zero.foo();}) : Promise<string>
->p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p1 : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
->then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >zero => {    return zero.foo();} : (zero: typeof import("tests/cases/conformance/dynamicImport/0")) => string
 >zero : typeof import("tests/cases/conformance/dynamicImport/0")
 
diff --git a/tests/baselines/reference/importCallExpressionInAMD2.types b/tests/baselines/reference/importCallExpressionInAMD2.types
index 875118acbac1a..07f5caa812140 100644
--- a/tests/baselines/reference/importCallExpressionInAMD2.types
+++ b/tests/baselines/reference/importCallExpressionInAMD2.types
@@ -15,9 +15,9 @@ function foo(x: Promise<any>) {
 
     x.then(value => {
 >x.then(value => {        let b = new value.B();        b.print();    }) : Promise<void>
->x.then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>x.then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >x : Promise<any>
->then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >value => {        let b = new value.B();        b.print();    } : (value: any) => void
 >value : any
 
diff --git a/tests/baselines/reference/importCallExpressionInAMD4.types b/tests/baselines/reference/importCallExpressionInAMD4.types
index afedd6f4b815f..d0fc91bb1a1b2 100644
--- a/tests/baselines/reference/importCallExpressionInAMD4.types
+++ b/tests/baselines/reference/importCallExpressionInAMD4.types
@@ -38,11 +38,11 @@ class C {
 
         this.myModule.then(Zero => {
 >this.myModule.then(Zero => {            console.log(Zero.foo());        }, async err => {            console.log(err);            let one = await import("./1");            console.log(one.backup());        }) : Promise<void>
->this.myModule.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>this.myModule.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >this.myModule : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
 >this : this
 >myModule : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
->then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >Zero => {            console.log(Zero.foo());        } : (Zero: typeof import("tests/cases/conformance/dynamicImport/0")) => void
 >Zero : typeof import("tests/cases/conformance/dynamicImport/0")
 
@@ -105,11 +105,11 @@ export class D {
 
         this.myModule.then(Zero => {
 >this.myModule.then(Zero => {            console.log(Zero.foo());        }, async err => {            console.log(err);            let one = await import("./1");            console.log(one.backup());        }) : Promise<void>
->this.myModule.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>this.myModule.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >this.myModule : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
 >this : this
 >myModule : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
->then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >Zero => {            console.log(Zero.foo());        } : (Zero: typeof import("tests/cases/conformance/dynamicImport/0")) => void
 >Zero : typeof import("tests/cases/conformance/dynamicImport/0")
 
diff --git a/tests/baselines/reference/importCallExpressionInCJS1.types b/tests/baselines/reference/importCallExpressionInCJS1.types
index 6d270e686edf2..90531faaac5de 100644
--- a/tests/baselines/reference/importCallExpressionInCJS1.types
+++ b/tests/baselines/reference/importCallExpressionInCJS1.types
@@ -15,9 +15,9 @@ var p1 = import("./0");
 
 p1.then(zero => {
 >p1.then(zero => {    return zero.foo();}) : Promise<string>
->p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p1 : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
->then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >zero => {    return zero.foo();} : (zero: typeof import("tests/cases/conformance/dynamicImport/0")) => string
 >zero : typeof import("tests/cases/conformance/dynamicImport/0")
 
diff --git a/tests/baselines/reference/importCallExpressionInCJS3.types b/tests/baselines/reference/importCallExpressionInCJS3.types
index 875118acbac1a..07f5caa812140 100644
--- a/tests/baselines/reference/importCallExpressionInCJS3.types
+++ b/tests/baselines/reference/importCallExpressionInCJS3.types
@@ -15,9 +15,9 @@ function foo(x: Promise<any>) {
 
     x.then(value => {
 >x.then(value => {        let b = new value.B();        b.print();    }) : Promise<void>
->x.then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>x.then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >x : Promise<any>
->then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >value => {        let b = new value.B();        b.print();    } : (value: any) => void
 >value : any
 
diff --git a/tests/baselines/reference/importCallExpressionInCJS5.types b/tests/baselines/reference/importCallExpressionInCJS5.types
index aea65c1407070..823c0c4dec5fd 100644
--- a/tests/baselines/reference/importCallExpressionInCJS5.types
+++ b/tests/baselines/reference/importCallExpressionInCJS5.types
@@ -38,11 +38,11 @@ class C {
 
         this.myModule.then(Zero => {
 >this.myModule.then(Zero => {            console.log(Zero.foo());        }, async err => {            console.log(err);            let one = await import("./1");            console.log(one.backup());        }) : Promise<void>
->this.myModule.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>this.myModule.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >this.myModule : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
 >this : this
 >myModule : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
->then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >Zero => {            console.log(Zero.foo());        } : (Zero: typeof import("tests/cases/conformance/dynamicImport/0")) => void
 >Zero : typeof import("tests/cases/conformance/dynamicImport/0")
 
@@ -105,11 +105,11 @@ export class D {
 
         this.myModule.then(Zero => {
 >this.myModule.then(Zero => {            console.log(Zero.foo());        }, async err => {            console.log(err);            let one = await import("./1");            console.log(one.backup());        }) : Promise<void>
->this.myModule.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>this.myModule.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >this.myModule : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
 >this : this
 >myModule : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
->then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >Zero => {            console.log(Zero.foo());        } : (Zero: typeof import("tests/cases/conformance/dynamicImport/0")) => void
 >Zero : typeof import("tests/cases/conformance/dynamicImport/0")
 
diff --git a/tests/baselines/reference/importCallExpressionInSystem1.types b/tests/baselines/reference/importCallExpressionInSystem1.types
index 6d270e686edf2..90531faaac5de 100644
--- a/tests/baselines/reference/importCallExpressionInSystem1.types
+++ b/tests/baselines/reference/importCallExpressionInSystem1.types
@@ -15,9 +15,9 @@ var p1 = import("./0");
 
 p1.then(zero => {
 >p1.then(zero => {    return zero.foo();}) : Promise<string>
->p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p1 : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
->then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >zero => {    return zero.foo();} : (zero: typeof import("tests/cases/conformance/dynamicImport/0")) => string
 >zero : typeof import("tests/cases/conformance/dynamicImport/0")
 
diff --git a/tests/baselines/reference/importCallExpressionInSystem2.types b/tests/baselines/reference/importCallExpressionInSystem2.types
index 875118acbac1a..07f5caa812140 100644
--- a/tests/baselines/reference/importCallExpressionInSystem2.types
+++ b/tests/baselines/reference/importCallExpressionInSystem2.types
@@ -15,9 +15,9 @@ function foo(x: Promise<any>) {
 
     x.then(value => {
 >x.then(value => {        let b = new value.B();        b.print();    }) : Promise<void>
->x.then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>x.then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >x : Promise<any>
->then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >value => {        let b = new value.B();        b.print();    } : (value: any) => void
 >value : any
 
diff --git a/tests/baselines/reference/importCallExpressionInSystem4.types b/tests/baselines/reference/importCallExpressionInSystem4.types
index afedd6f4b815f..d0fc91bb1a1b2 100644
--- a/tests/baselines/reference/importCallExpressionInSystem4.types
+++ b/tests/baselines/reference/importCallExpressionInSystem4.types
@@ -38,11 +38,11 @@ class C {
 
         this.myModule.then(Zero => {
 >this.myModule.then(Zero => {            console.log(Zero.foo());        }, async err => {            console.log(err);            let one = await import("./1");            console.log(one.backup());        }) : Promise<void>
->this.myModule.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>this.myModule.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >this.myModule : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
 >this : this
 >myModule : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
->then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >Zero => {            console.log(Zero.foo());        } : (Zero: typeof import("tests/cases/conformance/dynamicImport/0")) => void
 >Zero : typeof import("tests/cases/conformance/dynamicImport/0")
 
@@ -105,11 +105,11 @@ export class D {
 
         this.myModule.then(Zero => {
 >this.myModule.then(Zero => {            console.log(Zero.foo());        }, async err => {            console.log(err);            let one = await import("./1");            console.log(one.backup());        }) : Promise<void>
->this.myModule.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>this.myModule.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >this.myModule : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
 >this : this
 >myModule : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
->then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >Zero => {            console.log(Zero.foo());        } : (Zero: typeof import("tests/cases/conformance/dynamicImport/0")) => void
 >Zero : typeof import("tests/cases/conformance/dynamicImport/0")
 
diff --git a/tests/baselines/reference/importCallExpressionInUMD1.types b/tests/baselines/reference/importCallExpressionInUMD1.types
index 6d270e686edf2..90531faaac5de 100644
--- a/tests/baselines/reference/importCallExpressionInUMD1.types
+++ b/tests/baselines/reference/importCallExpressionInUMD1.types
@@ -15,9 +15,9 @@ var p1 = import("./0");
 
 p1.then(zero => {
 >p1.then(zero => {    return zero.foo();}) : Promise<string>
->p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p1.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p1 : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
->then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >zero => {    return zero.foo();} : (zero: typeof import("tests/cases/conformance/dynamicImport/0")) => string
 >zero : typeof import("tests/cases/conformance/dynamicImport/0")
 
diff --git a/tests/baselines/reference/importCallExpressionInUMD2.types b/tests/baselines/reference/importCallExpressionInUMD2.types
index 875118acbac1a..07f5caa812140 100644
--- a/tests/baselines/reference/importCallExpressionInUMD2.types
+++ b/tests/baselines/reference/importCallExpressionInUMD2.types
@@ -15,9 +15,9 @@ function foo(x: Promise<any>) {
 
     x.then(value => {
 >x.then(value => {        let b = new value.B();        b.print();    }) : Promise<void>
->x.then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>x.then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >x : Promise<any>
->then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >value => {        let b = new value.B();        b.print();    } : (value: any) => void
 >value : any
 
diff --git a/tests/baselines/reference/importCallExpressionInUMD4.types b/tests/baselines/reference/importCallExpressionInUMD4.types
index afedd6f4b815f..d0fc91bb1a1b2 100644
--- a/tests/baselines/reference/importCallExpressionInUMD4.types
+++ b/tests/baselines/reference/importCallExpressionInUMD4.types
@@ -38,11 +38,11 @@ class C {
 
         this.myModule.then(Zero => {
 >this.myModule.then(Zero => {            console.log(Zero.foo());        }, async err => {            console.log(err);            let one = await import("./1");            console.log(one.backup());        }) : Promise<void>
->this.myModule.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>this.myModule.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >this.myModule : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
 >this : this
 >myModule : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
->then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >Zero => {            console.log(Zero.foo());        } : (Zero: typeof import("tests/cases/conformance/dynamicImport/0")) => void
 >Zero : typeof import("tests/cases/conformance/dynamicImport/0")
 
@@ -105,11 +105,11 @@ export class D {
 
         this.myModule.then(Zero => {
 >this.myModule.then(Zero => {            console.log(Zero.foo());        }, async err => {            console.log(err);            let one = await import("./1");            console.log(one.backup());        }) : Promise<void>
->this.myModule.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>this.myModule.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >this.myModule : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
 >this : this
 >myModule : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
->then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >Zero => {            console.log(Zero.foo());        } : (Zero: typeof import("tests/cases/conformance/dynamicImport/0")) => void
 >Zero : typeof import("tests/cases/conformance/dynamicImport/0")
 
diff --git a/tests/baselines/reference/importCallExpressionNoModuleKindSpecified.types b/tests/baselines/reference/importCallExpressionNoModuleKindSpecified.types
index ef8cdaec2fa72..e8a056be625cf 100644
--- a/tests/baselines/reference/importCallExpressionNoModuleKindSpecified.types
+++ b/tests/baselines/reference/importCallExpressionNoModuleKindSpecified.types
@@ -38,11 +38,11 @@ class C {
 
         this.myModule.then(Zero => {
 >this.myModule.then(Zero => {            console.log(Zero.foo());        }, async err => {            console.log(err);            let one = await import("./1");            console.log(one.backup());        }) : Promise<void>
->this.myModule.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>this.myModule.then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >this.myModule : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
 >this : this
 >myModule : Promise<typeof import("tests/cases/conformance/dynamicImport/0")>
->then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = typeof import("tests/cases/conformance/dynamicImport/0"), TResult2 = never>(onfulfilled?: (value: typeof import("tests/cases/conformance/dynamicImport/0")) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >Zero => {            console.log(Zero.foo());        } : (Zero: typeof import("tests/cases/conformance/dynamicImport/0")) => void
 >Zero : typeof import("tests/cases/conformance/dynamicImport/0")
 
diff --git a/tests/baselines/reference/importCallExpressionReturnPromiseOfAny.types b/tests/baselines/reference/importCallExpressionReturnPromiseOfAny.types
index b5f526adc8e89..0f7db097e253d 100644
--- a/tests/baselines/reference/importCallExpressionReturnPromiseOfAny.types
+++ b/tests/baselines/reference/importCallExpressionReturnPromiseOfAny.types
@@ -66,9 +66,9 @@ const p2 = import(whatToLoad ? getSpecifier() : "defaulPath") as Promise<typeof
 
 p1.then(zero => {
 >p1.then(zero => {    return zero.foo();  // ok, zero is any}) : Promise<any>
->p1.then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p1.then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p1 : Promise<any>
->then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >zero => {    return zero.foo();  // ok, zero is any} : (zero: any) => any
 >zero : any
 
diff --git a/tests/baselines/reference/importCallExpressionShouldNotGetParen.types b/tests/baselines/reference/importCallExpressionShouldNotGetParen.types
index 3e4001dc5b710..43f9a9b384db9 100644
--- a/tests/baselines/reference/importCallExpressionShouldNotGetParen.types
+++ b/tests/baselines/reference/importCallExpressionShouldNotGetParen.types
@@ -5,11 +5,11 @@ const localeName = "zh-CN";
 
 import(`./locales/${localeName}.js`).then(bar => {
 >import(`./locales/${localeName}.js`).then(bar => {    let x = bar;}) : Promise<void>
->import(`./locales/${localeName}.js`).then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>import(`./locales/${localeName}.js`).then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >import(`./locales/${localeName}.js`) : Promise<any>
 >`./locales/${localeName}.js` : string
 >localeName : "zh-CN"
->then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >bar => {    let x = bar;} : (bar: any) => void
 >bar : any
 
@@ -21,14 +21,14 @@ import(`./locales/${localeName}.js`).then(bar => {
 
 import("./locales/" + localeName + ".js").then(bar => {
 >import("./locales/" + localeName + ".js").then(bar => {    let x = bar;}) : Promise<void>
->import("./locales/" + localeName + ".js").then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>import("./locales/" + localeName + ".js").then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >import("./locales/" + localeName + ".js") : Promise<any>
 >"./locales/" + localeName + ".js" : string
 >"./locales/" + localeName : string
 >"./locales/" : "./locales/"
 >localeName : "zh-CN"
 >".js" : ".js"
->then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >bar => {    let x = bar;} : (bar: any) => void
 >bar : any
 
diff --git a/tests/baselines/reference/importCallExpressionSpecifierNotStringTypeError.types b/tests/baselines/reference/importCallExpressionSpecifierNotStringTypeError.types
index 6378e7c582be8..6b9d010138587 100644
--- a/tests/baselines/reference/importCallExpressionSpecifierNotStringTypeError.types
+++ b/tests/baselines/reference/importCallExpressionSpecifierNotStringTypeError.types
@@ -28,9 +28,9 @@ const p2 = import(whatToLoad ? getSpecifier() : "defaulPath")
 
 p1.then(zero => {
 >p1.then(zero => {    return zero.foo();  // ok, zero is any}) : Promise<any>
->p1.then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p1.then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p1 : Promise<any>
->then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = any, TResult2 = never>(onfulfilled?: (value: any) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >zero => {    return zero.foo();  // ok, zero is any} : (zero: any) => any
 >zero : any
 
diff --git a/tests/baselines/reference/inferenceLimit.types b/tests/baselines/reference/inferenceLimit.types
index 6aa7ab501ea16..7e46a2679c29c 100644
--- a/tests/baselines/reference/inferenceLimit.types
+++ b/tests/baselines/reference/inferenceLimit.types
@@ -42,7 +42,7 @@ export class BrokenClass {
 
         this.doStuff(order.id)
 >this.doStuff(order.id)          .then((items) => {            order.items = items;            resolve(order);          }) : Promise<void>
->this.doStuff(order.id)          .then : <TResult1 = void, TResult2 = never>(onfulfilled?: (value: void) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>this.doStuff(order.id)          .then : <TResult1 = void, TResult2 = never>(onfulfilled?: (value: void) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >this.doStuff(order.id) : Promise<void>
 >this.doStuff : (id: number) => Promise<void>
 >this : this
@@ -52,7 +52,7 @@ export class BrokenClass {
 >id : any
 
           .then((items) => {
->then : <TResult1 = void, TResult2 = never>(onfulfilled?: (value: void) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = void, TResult2 = never>(onfulfilled?: (value: void) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >(items) => {            order.items = items;            resolve(order);          } : (items: void) => void
 >items : void
 
@@ -74,7 +74,7 @@ export class BrokenClass {
 
     return Promise.all(result.map(populateItems))
 >Promise.all(result.map(populateItems))      .then((orders: Array<MyModule.MyModel>) => {        resolve(orders);      }) : Promise<void>
->Promise.all(result.map(populateItems))      .then : <TResult1 = unknown[], TResult2 = never>(onfulfilled?: (value: unknown[]) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>Promise.all(result.map(populateItems))      .then : <TResult1 = unknown[], TResult2 = never>(onfulfilled?: (value: unknown[]) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >Promise.all(result.map(populateItems)) : Promise<unknown[]>
 >Promise.all : { <TAll>(values: Iterable<TAll | PromiseLike<TAll>>): Promise<TAll[]>; <T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>, T9 | PromiseLike<T9>, T10 | PromiseLike<T10>]): Promise<[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10]>; <T1, T2, T3, T4, T5, T6, T7, T8, T9>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>, T9 | PromiseLike<T9>]): Promise<[T1, T2, T3, T4, T5, T6, T7, T8, T9]>; <T1, T2, T3, T4, T5, T6, T7, T8>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>, T8 | PromiseLike<T8>]): Promise<[T1, T2, T3, T4, T5, T6, T7, T8]>; <T1, T2, T3, T4, T5, T6, T7>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>, T7 | PromiseLike<T7>]): Promise<[T1, T2, T3, T4, T5, T6, T7]>; <T1, T2, T3, T4, T5, T6>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>, T6 | PromiseLike<T6>]): Promise<[T1, T2, T3, T4, T5, T6]>; <T1, T2, T3, T4, T5>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>, T5 | PromiseLike<T5>]): Promise<[T1, T2, T3, T4, T5]>; <T1, T2, T3, T4>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>, T4 | PromiseLike<T4>]): Promise<[T1, T2, T3, T4]>; <T1, T2, T3>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>, T3 | PromiseLike<T3>]): Promise<[T1, T2, T3]>; <T1, T2>(values: [T1 | PromiseLike<T1>, T2 | PromiseLike<T2>]): Promise<[T1, T2]>; <T>(values: (T | PromiseLike<T>)[]): Promise<T[]>; }
 >Promise : PromiseConstructor
@@ -86,7 +86,7 @@ export class BrokenClass {
 >populateItems : (order: any) => Promise<unknown>
 
       .then((orders: Array<MyModule.MyModel>) => {
->then : <TResult1 = unknown[], TResult2 = never>(onfulfilled?: (value: unknown[]) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = unknown[], TResult2 = never>(onfulfilled?: (value: unknown[]) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >(orders: Array<MyModule.MyModel>) => {        resolve(orders);      } : (orders: MyModule.MyModel[]) => void
 >orders : MyModule.MyModel[]
 >MyModule : any
diff --git a/tests/baselines/reference/instantiateContextualTypes.types b/tests/baselines/reference/instantiateContextualTypes.types
index b5317b6f7561f..f0a94d52fef2a 100644
--- a/tests/baselines/reference/instantiateContextualTypes.types
+++ b/tests/baselines/reference/instantiateContextualTypes.types
@@ -340,12 +340,12 @@ class Interesting {
 
 		return Promise.resolve().then(() => {
 >Promise.resolve().then(() => {			if (1 < 2) {				return 'SOMETHING';			}			return 'ELSE';		}) : Promise<DooDad>
->Promise.resolve().then : <TResult1 = void, TResult2 = never>(onfulfilled?: ((value: void) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>Promise.resolve().then : <TResult1 = void, TResult2 = never>(onfulfilled?: ((value: void) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >Promise.resolve() : Promise<void>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
 >Promise : PromiseConstructor
 >resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
->then : <TResult1 = void, TResult2 = never>(onfulfilled?: ((value: void) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = void, TResult2 = never>(onfulfilled?: ((value: void) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {			if (1 < 2) {				return 'SOMETHING';			}			return 'ELSE';		} : () => "SOMETHING" | "ELSE"
 
 			if (1 < 2) {
@@ -367,12 +367,12 @@ class Interesting {
 
 		return Promise.resolve().then(() => {
 >Promise.resolve().then(() => {			return 'ELSE';		}) : Promise<DooDad>
->Promise.resolve().then : <TResult1 = void, TResult2 = never>(onfulfilled?: ((value: void) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>Promise.resolve().then : <TResult1 = void, TResult2 = never>(onfulfilled?: ((value: void) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >Promise.resolve() : Promise<void>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
 >Promise : PromiseConstructor
 >resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
->then : <TResult1 = void, TResult2 = never>(onfulfilled?: ((value: void) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = void, TResult2 = never>(onfulfilled?: ((value: void) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {			return 'ELSE';		} : () => "ELSE"
 
 			return 'ELSE';
@@ -386,12 +386,12 @@ class Interesting {
 
 		return Promise.resolve().then(() => {
 >Promise.resolve().then(() => {			if (1 < 2) {				return 'SOMETHING';			}			return 'SOMETHING';		}) : Promise<DooDad>
->Promise.resolve().then : <TResult1 = void, TResult2 = never>(onfulfilled?: ((value: void) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>Promise.resolve().then : <TResult1 = void, TResult2 = never>(onfulfilled?: ((value: void) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >Promise.resolve() : Promise<void>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
 >Promise : PromiseConstructor
 >resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
->then : <TResult1 = void, TResult2 = never>(onfulfilled?: ((value: void) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = void, TResult2 = never>(onfulfilled?: ((value: void) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {			if (1 < 2) {				return 'SOMETHING';			}			return 'SOMETHING';		} : () => "SOMETHING"
 
 			if (1 < 2) {
diff --git a/tests/baselines/reference/modularizeLibrary_NoErrorDuplicateLibOptions1.types b/tests/baselines/reference/modularizeLibrary_NoErrorDuplicateLibOptions1.types
index c9a0476c2adcf..2bc1e64f87489 100644
--- a/tests/baselines/reference/modularizeLibrary_NoErrorDuplicateLibOptions1.types
+++ b/tests/baselines/reference/modularizeLibrary_NoErrorDuplicateLibOptions1.types
@@ -148,10 +148,10 @@ declare var console: any;
 
 out().then(() => {
 >out().then(() => {    console.log("Yea!");}) : Promise<void>
->out().then : <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>out().then : <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >out() : Promise<unknown>
 >out : () => Promise<unknown>
->then : <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {    console.log("Yea!");} : () => void
 
     console.log("Yea!");
diff --git a/tests/baselines/reference/modularizeLibrary_NoErrorDuplicateLibOptions2.types b/tests/baselines/reference/modularizeLibrary_NoErrorDuplicateLibOptions2.types
index a695213a42ccd..6653f64a44c88 100644
--- a/tests/baselines/reference/modularizeLibrary_NoErrorDuplicateLibOptions2.types
+++ b/tests/baselines/reference/modularizeLibrary_NoErrorDuplicateLibOptions2.types
@@ -148,10 +148,10 @@ declare var console: any;
 
 out().then(() => {
 >out().then(() => {    console.log("Yea!");}) : Promise<void>
->out().then : <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>out().then : <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >out() : Promise<unknown>
 >out : () => Promise<unknown>
->then : <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {    console.log("Yea!");} : () => void
 
     console.log("Yea!");
diff --git a/tests/baselines/reference/modularizeLibrary_TargetES5UsingES6Lib.types b/tests/baselines/reference/modularizeLibrary_TargetES5UsingES6Lib.types
index 3e7c23fde87ac..b5bab1c2e1a52 100644
--- a/tests/baselines/reference/modularizeLibrary_TargetES5UsingES6Lib.types
+++ b/tests/baselines/reference/modularizeLibrary_TargetES5UsingES6Lib.types
@@ -148,10 +148,10 @@ declare var console: any;
 
 out().then(() => {
 >out().then(() => {    console.log("Yea!");}) : Promise<void>
->out().then : <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>out().then : <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >out() : Promise<unknown>
 >out : () => Promise<unknown>
->then : <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {    console.log("Yea!");} : () => void
 
     console.log("Yea!");
diff --git a/tests/baselines/reference/optionalFunctionArgAssignability.types b/tests/baselines/reference/optionalFunctionArgAssignability.types
index a1975cc3645e0..acca19b7f6767 100644
--- a/tests/baselines/reference/optionalFunctionArgAssignability.types
+++ b/tests/baselines/reference/optionalFunctionArgAssignability.types
@@ -1,7 +1,7 @@
 === tests/cases/compiler/optionalFunctionArgAssignability.ts ===
 interface Promise<T> {
     then<U>(onFulfill?: (value: T) => U, onReject?: (reason: any) => U): Promise<U>;
->then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(onFulfill?: (value: T) => U, onReject?: (reason: any) => U): Promise<U>; }
+>then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(onFulfill?: (value: T) => U, onReject?: (reason: any) => U): Promise<U>; }
 >onFulfill : (value: T) => U
 >value : T
 >onReject : (reason: any) => U
diff --git a/tests/baselines/reference/promisePermutations.errors.txt b/tests/baselines/reference/promisePermutations.errors.txt
index 1cb61562fe328..7fa7f5f62a171 100644
--- a/tests/baselines/reference/promisePermutations.errors.txt
+++ b/tests/baselines/reference/promisePermutations.errors.txt
@@ -124,7 +124,7 @@ tests/cases/compiler/promisePermutations.ts(160,21): error TS2769: No overload m
     Argument of type '{ (x: number): Promise<number>; (x: string): Promise<string>; }' is not assignable to parameter of type '(value: number) => IPromise<string>'.
       Type 'Promise<number>' is not assignable to type 'IPromise<string>'.
         Types of property 'then' are incompatible.
-          Type '{ <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }' is not assignable to type '{ <U>(success?: (value: string) => IPromise<U>, error?: (error: any) => IPromise<U>, progress?: (progress: any) => void): IPromise<U>; <U>(success?: (value: string) => IPromise<U>, error?: (error: any) => U, progress?: (progress: any) => void): IPromise<U>; <U>(success?: (value: string) => U, error?: (error: any) => IPromise<U>, progress?: (progress: any) => void): IPromise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): IPromise<U>; }'.
+          Type '{ <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }' is not assignable to type '{ <U>(success?: (value: string) => IPromise<U>, error?: (error: any) => IPromise<U>, progress?: (progress: any) => void): IPromise<U>; <U>(success?: (value: string) => IPromise<U>, error?: (error: any) => U, progress?: (progress: any) => void): IPromise<U>; <U>(success?: (value: string) => U, error?: (error: any) => IPromise<U>, progress?: (progress: any) => void): IPromise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): IPromise<U>; }'.
             Types of parameters 'onfulfilled' and 'success' are incompatible.
               Types of parameters 'value' and 'value' are incompatible.
                 Type 'number' is not assignable to type 'string'.
@@ -483,7 +483,7 @@ tests/cases/compiler/promisePermutations.ts(160,21): error TS2769: No overload m
 !!! error TS2769:     Argument of type '{ (x: number): Promise<number>; (x: string): Promise<string>; }' is not assignable to parameter of type '(value: number) => IPromise<string>'.
 !!! error TS2769:       Type 'Promise<number>' is not assignable to type 'IPromise<string>'.
 !!! error TS2769:         Types of property 'then' are incompatible.
-!!! error TS2769:           Type '{ <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }' is not assignable to type '{ <U>(success?: (value: string) => IPromise<U>, error?: (error: any) => IPromise<U>, progress?: (progress: any) => void): IPromise<U>; <U>(success?: (value: string) => IPromise<U>, error?: (error: any) => U, progress?: (progress: any) => void): IPromise<U>; <U>(success?: (value: string) => U, error?: (error: any) => IPromise<U>, progress?: (progress: any) => void): IPromise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): IPromise<U>; }'.
+!!! error TS2769:           Type '{ <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }' is not assignable to type '{ <U>(success?: (value: string) => IPromise<U>, error?: (error: any) => IPromise<U>, progress?: (progress: any) => void): IPromise<U>; <U>(success?: (value: string) => IPromise<U>, error?: (error: any) => U, progress?: (progress: any) => void): IPromise<U>; <U>(success?: (value: string) => U, error?: (error: any) => IPromise<U>, progress?: (progress: any) => void): IPromise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): IPromise<U>; }'.
 !!! error TS2769:             Types of parameters 'onfulfilled' and 'success' are incompatible.
 !!! error TS2769:               Types of parameters 'value' and 'value' are incompatible.
 !!! error TS2769:                 Type 'number' is not assignable to type 'string'.
diff --git a/tests/baselines/reference/promisePermutations.types b/tests/baselines/reference/promisePermutations.types
index 0dbe5f7ec0eb0..c53b3e651a8c2 100644
--- a/tests/baselines/reference/promisePermutations.types
+++ b/tests/baselines/reference/promisePermutations.types
@@ -1,7 +1,7 @@
 === tests/cases/compiler/promisePermutations.ts ===
 interface Promise<T> {
     then<U>(success?: (value: T) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>;
->then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >success : (value: T) => Promise<U>
 >value : T
 >error : (error: any) => Promise<U>
@@ -10,7 +10,7 @@ interface Promise<T> {
 >progress : any
 
     then<U>(success?: (value: T) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>;
->then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >success : (value: T) => Promise<U>
 >value : T
 >error : (error: any) => U
@@ -19,7 +19,7 @@ interface Promise<T> {
 >progress : any
 
     then<U>(success?: (value: T) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>;
->then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >success : (value: T) => U
 >value : T
 >error : (error: any) => Promise<U>
@@ -28,7 +28,7 @@ interface Promise<T> {
 >progress : any
 
     then<U>(success?: (value: T) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>;
->then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >success : (value: T) => U
 >value : T
 >error : (error: any) => U
@@ -272,9 +272,9 @@ var s1: Promise<number>;
 var s1a = s1.then(testFunction, testFunction, testFunction);
 >s1a : Promise<IPromise<number>>
 >s1.then(testFunction, testFunction, testFunction) : Promise<IPromise<number>>
->s1.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s1.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s1 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction : () => IPromise<number>
 >testFunction : () => IPromise<number>
 >testFunction : () => IPromise<number>
@@ -282,9 +282,9 @@ var s1a = s1.then(testFunction, testFunction, testFunction);
 var s1b = s1.then(testFunctionP, testFunctionP, testFunctionP);
 >s1b : Promise<number>
 >s1.then(testFunctionP, testFunctionP, testFunctionP) : Promise<number>
->s1.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s1.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s1 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunctionP : () => Promise<number>
 >testFunctionP : () => Promise<number>
 >testFunctionP : () => Promise<number>
@@ -292,9 +292,9 @@ var s1b = s1.then(testFunctionP, testFunctionP, testFunctionP);
 var s1c = s1.then(testFunctionP, testFunction, testFunction);
 >s1c : Promise<IPromise<number>>
 >s1.then(testFunctionP, testFunction, testFunction) : Promise<IPromise<number>>
->s1.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s1.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s1 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunctionP : () => Promise<number>
 >testFunction : () => IPromise<number>
 >testFunction : () => IPromise<number>
@@ -302,15 +302,15 @@ var s1c = s1.then(testFunctionP, testFunction, testFunction);
 var s1d = s1.then(testFunctionP, testFunction, testFunction).then(testFunction, testFunction, testFunction);
 >s1d : Promise<IPromise<number>>
 >s1.then(testFunctionP, testFunction, testFunction).then(testFunction, testFunction, testFunction) : Promise<IPromise<number>>
->s1.then(testFunctionP, testFunction, testFunction).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s1.then(testFunctionP, testFunction, testFunction).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s1.then(testFunctionP, testFunction, testFunction) : Promise<IPromise<number>>
->s1.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s1.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s1 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunctionP : () => Promise<number>
 >testFunction : () => IPromise<number>
 >testFunction : () => IPromise<number>
->then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction : () => IPromise<number>
 >testFunction : () => IPromise<number>
 >testFunction : () => IPromise<number>
@@ -352,9 +352,9 @@ var s2: Promise<{ x: number; }>;
 var s2a = s2.then(testFunction2, testFunction2, testFunction2);
 >s2a : Promise<IPromise<{ x: number; }>>
 >s2.then(testFunction2, testFunction2, testFunction2) : Promise<IPromise<{ x: number; }>>
->s2.then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s2.then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s2 : Promise<{ x: number; }>
->then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction2 : () => IPromise<{ x: number; }>
 >testFunction2 : () => IPromise<{ x: number; }>
 >testFunction2 : () => IPromise<{ x: number; }>
@@ -362,9 +362,9 @@ var s2a = s2.then(testFunction2, testFunction2, testFunction2);
 var s2b = s2.then(testFunction2P, testFunction2P, testFunction2P);
 >s2b : Promise<{ x: number; }>
 >s2.then(testFunction2P, testFunction2P, testFunction2P) : Promise<{ x: number; }>
->s2.then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s2.then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s2 : Promise<{ x: number; }>
->then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction2P : () => Promise<{ x: number; }>
 >testFunction2P : () => Promise<{ x: number; }>
 >testFunction2P : () => Promise<{ x: number; }>
@@ -372,9 +372,9 @@ var s2b = s2.then(testFunction2P, testFunction2P, testFunction2P);
 var s2c = s2.then(testFunction2P, testFunction2, testFunction2);
 >s2c : Promise<IPromise<{ x: number; }>>
 >s2.then(testFunction2P, testFunction2, testFunction2) : Promise<IPromise<{ x: number; }>>
->s2.then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s2.then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s2 : Promise<{ x: number; }>
->then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction2P : () => Promise<{ x: number; }>
 >testFunction2 : () => IPromise<{ x: number; }>
 >testFunction2 : () => IPromise<{ x: number; }>
@@ -382,15 +382,15 @@ var s2c = s2.then(testFunction2P, testFunction2, testFunction2);
 var s2d = s2.then(testFunction2P, testFunction2, testFunction2).then(testFunction2, testFunction2, testFunction2);
 >s2d : Promise<IPromise<{ x: number; }>>
 >s2.then(testFunction2P, testFunction2, testFunction2).then(testFunction2, testFunction2, testFunction2) : Promise<IPromise<{ x: number; }>>
->s2.then(testFunction2P, testFunction2, testFunction2).then : { <TResult1 = IPromise<{ x: number; }>, TResult2 = never>(onfulfilled?: (value: IPromise<{ x: number; }>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<{ x: number; }>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<{ x: number; }>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<{ x: number; }>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<{ x: number; }>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s2.then(testFunction2P, testFunction2, testFunction2).then : { <TResult1 = IPromise<{ x: number; }>, TResult2 = never>(onfulfilled?: (value: IPromise<{ x: number; }>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<{ x: number; }>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<{ x: number; }>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<{ x: number; }>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<{ x: number; }>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s2.then(testFunction2P, testFunction2, testFunction2) : Promise<IPromise<{ x: number; }>>
->s2.then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s2.then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s2 : Promise<{ x: number; }>
->then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction2P : () => Promise<{ x: number; }>
 >testFunction2 : () => IPromise<{ x: number; }>
 >testFunction2 : () => IPromise<{ x: number; }>
->then : { <TResult1 = IPromise<{ x: number; }>, TResult2 = never>(onfulfilled?: (value: IPromise<{ x: number; }>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<{ x: number; }>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<{ x: number; }>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<{ x: number; }>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<{ x: number; }>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = IPromise<{ x: number; }>, TResult2 = never>(onfulfilled?: (value: IPromise<{ x: number; }>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<{ x: number; }>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<{ x: number; }>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<{ x: number; }>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<{ x: number; }>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction2 : () => IPromise<{ x: number; }>
 >testFunction2 : () => IPromise<{ x: number; }>
 >testFunction2 : () => IPromise<{ x: number; }>
@@ -430,9 +430,9 @@ var s3: Promise<number>;
 var s3a = s3.then(testFunction3, testFunction3, testFunction3);
 >s3a : Promise<IPromise<number>>
 >s3.then(testFunction3, testFunction3, testFunction3) : Promise<IPromise<number>>
->s3.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s3.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s3 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction3 : (x: number) => IPromise<number>
 >testFunction3 : (x: number) => IPromise<number>
 >testFunction3 : (x: number) => IPromise<number>
@@ -440,9 +440,9 @@ var s3a = s3.then(testFunction3, testFunction3, testFunction3);
 var s3b = s3.then(testFunction3P, testFunction3P, testFunction3P);
 >s3b : Promise<number>
 >s3.then(testFunction3P, testFunction3P, testFunction3P) : Promise<number>
->s3.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s3.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s3 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction3P : (x: number) => Promise<number>
 >testFunction3P : (x: number) => Promise<number>
 >testFunction3P : (x: number) => Promise<number>
@@ -450,9 +450,9 @@ var s3b = s3.then(testFunction3P, testFunction3P, testFunction3P);
 var s3c = s3.then(testFunction3P, testFunction3, testFunction3);
 >s3c : Promise<IPromise<number>>
 >s3.then(testFunction3P, testFunction3, testFunction3) : Promise<IPromise<number>>
->s3.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s3.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s3 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction3P : (x: number) => Promise<number>
 >testFunction3 : (x: number) => IPromise<number>
 >testFunction3 : (x: number) => IPromise<number>
@@ -460,15 +460,15 @@ var s3c = s3.then(testFunction3P, testFunction3, testFunction3);
 var s3d = s3.then(testFunction3P, testFunction3, testFunction3).then(testFunction3, testFunction3, testFunction3); // error
 >s3d : any
 >s3.then(testFunction3P, testFunction3, testFunction3).then(testFunction3, testFunction3, testFunction3) : any
->s3.then(testFunction3P, testFunction3, testFunction3).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s3.then(testFunction3P, testFunction3, testFunction3).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s3.then(testFunction3P, testFunction3, testFunction3) : Promise<IPromise<number>>
->s3.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s3.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s3 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction3P : (x: number) => Promise<number>
 >testFunction3 : (x: number) => IPromise<number>
 >testFunction3 : (x: number) => IPromise<number>
->then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction3 : (x: number) => IPromise<number>
 >testFunction3 : (x: number) => IPromise<number>
 >testFunction3 : (x: number) => IPromise<number>
@@ -516,9 +516,9 @@ var s4: Promise<string>;
 var s4a = s4.then(testFunction4, testFunction4, testFunction4); // error
 >s4a : any
 >s4.then(testFunction4, testFunction4, testFunction4) : any
->s4.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s4.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s4 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction4 : (x: number, y?: string) => IPromise<string>
 >testFunction4 : (x: number, y?: string) => IPromise<string>
 >testFunction4 : (x: number, y?: string) => IPromise<string>
@@ -526,9 +526,9 @@ var s4a = s4.then(testFunction4, testFunction4, testFunction4); // error
 var s4b = s4.then(testFunction4P, testFunction4P, testFunction4P); // error 
 >s4b : any
 >s4.then(testFunction4P, testFunction4P, testFunction4P) : any
->s4.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s4.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s4 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction4P : (x: number, y?: string) => Promise<string>
 >testFunction4P : (x: number, y?: string) => Promise<string>
 >testFunction4P : (x: number, y?: string) => Promise<string>
@@ -536,9 +536,9 @@ var s4b = s4.then(testFunction4P, testFunction4P, testFunction4P); // error
 var s4c = s4.then(testFunction4P, testFunction4, testFunction4); // error
 >s4c : any
 >s4.then(testFunction4P, testFunction4, testFunction4) : any
->s4.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s4.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s4 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction4P : (x: number, y?: string) => Promise<string>
 >testFunction4 : (x: number, y?: string) => IPromise<string>
 >testFunction4 : (x: number, y?: string) => IPromise<string>
@@ -546,15 +546,15 @@ var s4c = s4.then(testFunction4P, testFunction4, testFunction4); // error
 var s4d = s4.then(sIPromise, testFunction4P, testFunction4).then(sIPromise, testFunction4P, testFunction4);
 >s4d : Promise<IPromise<string>>
 >s4.then(sIPromise, testFunction4P, testFunction4).then(sIPromise, testFunction4P, testFunction4) : Promise<IPromise<string>>
->s4.then(sIPromise, testFunction4P, testFunction4).then : { <TResult1 = IPromise<string>, TResult2 = never>(onfulfilled?: (value: IPromise<string>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<string>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<string>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<string>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<string>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s4.then(sIPromise, testFunction4P, testFunction4).then : { <TResult1 = IPromise<string>, TResult2 = never>(onfulfilled?: (value: IPromise<string>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<string>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<string>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<string>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<string>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s4.then(sIPromise, testFunction4P, testFunction4) : Promise<IPromise<string>>
->s4.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s4.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s4 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sIPromise : (x: any) => IPromise<string>
 >testFunction4P : (x: number, y?: string) => Promise<string>
 >testFunction4 : (x: number, y?: string) => IPromise<string>
->then : { <TResult1 = IPromise<string>, TResult2 = never>(onfulfilled?: (value: IPromise<string>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<string>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<string>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<string>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<string>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = IPromise<string>, TResult2 = never>(onfulfilled?: (value: IPromise<string>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<string>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<string>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<string>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<string>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sIPromise : (x: any) => IPromise<string>
 >testFunction4P : (x: number, y?: string) => Promise<string>
 >testFunction4 : (x: number, y?: string) => IPromise<string>
@@ -594,9 +594,9 @@ var s5: Promise<string>;
 var s5a = s5.then(testFunction5, testFunction5, testFunction5); // error
 >s5a : any
 >s5.then(testFunction5, testFunction5, testFunction5) : any
->s5.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s5.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s5 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction5 : (x: number, cb: (a: string) => string) => IPromise<string>
 >testFunction5 : (x: number, cb: (a: string) => string) => IPromise<string>
 >testFunction5 : (x: number, cb: (a: string) => string) => IPromise<string>
@@ -604,9 +604,9 @@ var s5a = s5.then(testFunction5, testFunction5, testFunction5); // error
 var s5b = s5.then(testFunction5P, testFunction5P, testFunction5P); // error
 >s5b : any
 >s5.then(testFunction5P, testFunction5P, testFunction5P) : any
->s5.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s5.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s5 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction5P : (x: number, cb: (a: string) => string) => Promise<string>
 >testFunction5P : (x: number, cb: (a: string) => string) => Promise<string>
 >testFunction5P : (x: number, cb: (a: string) => string) => Promise<string>
@@ -614,9 +614,9 @@ var s5b = s5.then(testFunction5P, testFunction5P, testFunction5P); // error
 var s5c = s5.then(testFunction5P, testFunction5, testFunction5); // error
 >s5c : any
 >s5.then(testFunction5P, testFunction5, testFunction5) : any
->s5.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s5.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s5 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction5P : (x: number, cb: (a: string) => string) => Promise<string>
 >testFunction5 : (x: number, cb: (a: string) => string) => IPromise<string>
 >testFunction5 : (x: number, cb: (a: string) => string) => IPromise<string>
@@ -624,15 +624,15 @@ var s5c = s5.then(testFunction5P, testFunction5, testFunction5); // error
 var s5d = s5.then(sPromise, sPromise, sPromise).then(sIPromise, sIPromise, sIPromise); // ok
 >s5d : Promise<IPromise<string>>
 >s5.then(sPromise, sPromise, sPromise).then(sIPromise, sIPromise, sIPromise) : Promise<IPromise<string>>
->s5.then(sPromise, sPromise, sPromise).then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s5.then(sPromise, sPromise, sPromise).then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s5.then(sPromise, sPromise, sPromise) : Promise<string>
->s5.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s5.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s5 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sPromise : (x: any) => Promise<string>
 >sPromise : (x: any) => Promise<string>
 >sPromise : (x: any) => Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sIPromise : (x: any) => IPromise<string>
 >sIPromise : (x: any) => IPromise<string>
 >sIPromise : (x: any) => IPromise<string>
@@ -672,9 +672,9 @@ var s6: Promise<string>;
 var s6a = s6.then(testFunction6, testFunction6, testFunction6); // error
 >s6a : any
 >s6.then(testFunction6, testFunction6, testFunction6) : any
->s6.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s6.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s6 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction6 : (x: number, cb: <T>(a: T) => T) => IPromise<string>
 >testFunction6 : (x: number, cb: <T>(a: T) => T) => IPromise<string>
 >testFunction6 : (x: number, cb: <T>(a: T) => T) => IPromise<string>
@@ -682,9 +682,9 @@ var s6a = s6.then(testFunction6, testFunction6, testFunction6); // error
 var s6b = s6.then(testFunction6P, testFunction6P, testFunction6P); // error
 >s6b : any
 >s6.then(testFunction6P, testFunction6P, testFunction6P) : any
->s6.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s6.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s6 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction6P : (x: number, cb: <T>(a: T) => T) => Promise<string>
 >testFunction6P : (x: number, cb: <T>(a: T) => T) => Promise<string>
 >testFunction6P : (x: number, cb: <T>(a: T) => T) => Promise<string>
@@ -692,9 +692,9 @@ var s6b = s6.then(testFunction6P, testFunction6P, testFunction6P); // error
 var s6c = s6.then(testFunction6P, testFunction6, testFunction6); // error
 >s6c : any
 >s6.then(testFunction6P, testFunction6, testFunction6) : any
->s6.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s6.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s6 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction6P : (x: number, cb: <T>(a: T) => T) => Promise<string>
 >testFunction6 : (x: number, cb: <T>(a: T) => T) => IPromise<string>
 >testFunction6 : (x: number, cb: <T>(a: T) => T) => IPromise<string>
@@ -702,15 +702,15 @@ var s6c = s6.then(testFunction6P, testFunction6, testFunction6); // error
 var s6d = s6.then(sPromise, sPromise, sPromise).then(sIPromise, sIPromise, sIPromise); // ok
 >s6d : Promise<IPromise<string>>
 >s6.then(sPromise, sPromise, sPromise).then(sIPromise, sIPromise, sIPromise) : Promise<IPromise<string>>
->s6.then(sPromise, sPromise, sPromise).then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s6.then(sPromise, sPromise, sPromise).then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s6.then(sPromise, sPromise, sPromise) : Promise<string>
->s6.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s6.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s6 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sPromise : (x: any) => Promise<string>
 >sPromise : (x: any) => Promise<string>
 >sPromise : (x: any) => Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sIPromise : (x: any) => IPromise<string>
 >sIPromise : (x: any) => IPromise<string>
 >sIPromise : (x: any) => IPromise<string>
@@ -836,9 +836,9 @@ var s8: Promise<number>;
 var s8a = s8.then(testFunction8, testFunction8, testFunction8); // error
 >s8a : any
 >s8.then(testFunction8, testFunction8, testFunction8) : any
->s8.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s8.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s8 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction8 : <T>(x: T, cb: (a: T) => T) => IPromise<T>
 >testFunction8 : <T>(x: T, cb: (a: T) => T) => IPromise<T>
 >testFunction8 : <T>(x: T, cb: (a: T) => T) => IPromise<T>
@@ -846,9 +846,9 @@ var s8a = s8.then(testFunction8, testFunction8, testFunction8); // error
 var s8b = s8.then(testFunction8P, testFunction8P, testFunction8P); // error
 >s8b : any
 >s8.then(testFunction8P, testFunction8P, testFunction8P) : any
->s8.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s8.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s8 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction8P : <T>(x: T, cb: (a: T) => T) => Promise<T>
 >testFunction8P : <T>(x: T, cb: (a: T) => T) => Promise<T>
 >testFunction8P : <T>(x: T, cb: (a: T) => T) => Promise<T>
@@ -856,9 +856,9 @@ var s8b = s8.then(testFunction8P, testFunction8P, testFunction8P); // error
 var s8c = s8.then(testFunction8P, testFunction8, testFunction8); // error
 >s8c : any
 >s8.then(testFunction8P, testFunction8, testFunction8) : any
->s8.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s8.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s8 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction8P : <T>(x: T, cb: (a: T) => T) => Promise<T>
 >testFunction8 : <T>(x: T, cb: (a: T) => T) => IPromise<T>
 >testFunction8 : <T>(x: T, cb: (a: T) => T) => IPromise<T>
@@ -866,15 +866,15 @@ var s8c = s8.then(testFunction8P, testFunction8, testFunction8); // error
 var s8d = s8.then(nIPromise, nIPromise, nIPromise).then(nIPromise, nIPromise, nIPromise); // ok
 >s8d : Promise<IPromise<number>>
 >s8.then(nIPromise, nIPromise, nIPromise).then(nIPromise, nIPromise, nIPromise) : Promise<IPromise<number>>
->s8.then(nIPromise, nIPromise, nIPromise).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s8.then(nIPromise, nIPromise, nIPromise).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s8.then(nIPromise, nIPromise, nIPromise) : Promise<IPromise<number>>
->s8.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s8.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s8 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >nIPromise : (x: any) => IPromise<number>
 >nIPromise : (x: any) => IPromise<number>
 >nIPromise : (x: any) => IPromise<number>
->then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >nIPromise : (x: any) => IPromise<number>
 >nIPromise : (x: any) => IPromise<number>
 >nIPromise : (x: any) => IPromise<number>
@@ -944,9 +944,9 @@ var s9: Promise<number>;
 var s9a = s9.then(testFunction9, testFunction9, testFunction9); // error
 >s9a : any
 >s9.then(testFunction9, testFunction9, testFunction9) : any
->s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s9 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction9 : <T>(x: T, cb: <U>(a: U) => U) => IPromise<T>
 >testFunction9 : <T>(x: T, cb: <U>(a: U) => U) => IPromise<T>
 >testFunction9 : <T>(x: T, cb: <U>(a: U) => U) => IPromise<T>
@@ -954,9 +954,9 @@ var s9a = s9.then(testFunction9, testFunction9, testFunction9); // error
 var s9b = s9.then(testFunction9P, testFunction9P, testFunction9P); // error
 >s9b : any
 >s9.then(testFunction9P, testFunction9P, testFunction9P) : any
->s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s9 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction9P : <T>(x: T, cb: <U>(a: U) => U) => Promise<T>
 >testFunction9P : <T>(x: T, cb: <U>(a: U) => U) => Promise<T>
 >testFunction9P : <T>(x: T, cb: <U>(a: U) => U) => Promise<T>
@@ -964,9 +964,9 @@ var s9b = s9.then(testFunction9P, testFunction9P, testFunction9P); // error
 var s9c = s9.then(testFunction9P, testFunction9, testFunction9); // error
 >s9c : any
 >s9.then(testFunction9P, testFunction9, testFunction9) : any
->s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s9 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction9P : <T>(x: T, cb: <U>(a: U) => U) => Promise<T>
 >testFunction9 : <T>(x: T, cb: <U>(a: U) => U) => IPromise<T>
 >testFunction9 : <T>(x: T, cb: <U>(a: U) => U) => IPromise<T>
@@ -974,9 +974,9 @@ var s9c = s9.then(testFunction9P, testFunction9, testFunction9); // error
 var s9d = s9.then(sPromise, sPromise, sPromise); // ok
 >s9d : Promise<string>
 >s9.then(sPromise, sPromise, sPromise) : Promise<string>
->s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s9 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sPromise : (x: any) => Promise<string>
 >sPromise : (x: any) => Promise<string>
 >sPromise : (x: any) => Promise<string>
@@ -984,9 +984,9 @@ var s9d = s9.then(sPromise, sPromise, sPromise); // ok
 var s9e = s9.then(nPromise, nPromise, nPromise); // ok
 >s9e : Promise<number>
 >s9.then(nPromise, nPromise, nPromise) : Promise<number>
->s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s9 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >nPromise : (x: any) => Promise<number>
 >nPromise : (x: any) => Promise<number>
 >nPromise : (x: any) => Promise<number>
@@ -994,9 +994,9 @@ var s9e = s9.then(nPromise, nPromise, nPromise); // ok
 var s9f = s9.then(testFunction, sIPromise, nIPromise); // error
 >s9f : any
 >s9.then(testFunction, sIPromise, nIPromise) : any
->s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s9 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction : () => IPromise<number>
 >sIPromise : (x: any) => IPromise<string>
 >nIPromise : (x: any) => IPromise<number>
@@ -1004,15 +1004,15 @@ var s9f = s9.then(testFunction, sIPromise, nIPromise); // error
 var s9g = s9.then(testFunction, nIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise); // ok
 >s9g : Promise<IPromise<string>>
 >s9.then(testFunction, nIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise) : Promise<IPromise<string>>
->s9.then(testFunction, nIPromise, sIPromise).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s9.then(testFunction, nIPromise, sIPromise).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s9.then(testFunction, nIPromise, sIPromise) : Promise<IPromise<number>>
->s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s9 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction : () => IPromise<number>
 >nIPromise : (x: any) => IPromise<number>
 >sIPromise : (x: any) => IPromise<string>
->then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sIPromise : (x: any) => IPromise<string>
 >sIPromise : (x: any) => IPromise<string>
 >sIPromise : (x: any) => IPromise<string>
@@ -1092,9 +1092,9 @@ var s10 = testFunction10P(x => x);
 var s10a = s10.then(testFunction10, testFunction10, testFunction10); // ok
 >s10a : Promise<IPromise<unknown>>
 >s10.then(testFunction10, testFunction10, testFunction10) : Promise<IPromise<unknown>>
->s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s10 : Promise<unknown>
->then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction10 : <T>(cb: <U>(a: U) => U) => IPromise<T>
 >testFunction10 : <T>(cb: <U>(a: U) => U) => IPromise<T>
 >testFunction10 : <T>(cb: <U>(a: U) => U) => IPromise<T>
@@ -1102,9 +1102,9 @@ var s10a = s10.then(testFunction10, testFunction10, testFunction10); // ok
 var s10b = s10.then(testFunction10P, testFunction10P, testFunction10P); // ok
 >s10b : Promise<unknown>
 >s10.then(testFunction10P, testFunction10P, testFunction10P) : Promise<unknown>
->s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s10 : Promise<unknown>
->then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction10P : <T>(cb: <U>(a: U) => U) => Promise<T>
 >testFunction10P : <T>(cb: <U>(a: U) => U) => Promise<T>
 >testFunction10P : <T>(cb: <U>(a: U) => U) => Promise<T>
@@ -1112,9 +1112,9 @@ var s10b = s10.then(testFunction10P, testFunction10P, testFunction10P); // ok
 var s10c = s10.then(testFunction10P, testFunction10, testFunction10); // ok
 >s10c : Promise<unknown>
 >s10.then(testFunction10P, testFunction10, testFunction10) : Promise<unknown>
->s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s10 : Promise<unknown>
->then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction10P : <T>(cb: <U>(a: U) => U) => Promise<T>
 >testFunction10 : <T>(cb: <U>(a: U) => U) => IPromise<T>
 >testFunction10 : <T>(cb: <U>(a: U) => U) => IPromise<T>
@@ -1122,9 +1122,9 @@ var s10c = s10.then(testFunction10P, testFunction10, testFunction10); // ok
 var s10d = s10.then(sPromise, sPromise, sPromise); // ok
 >s10d : Promise<string>
 >s10.then(sPromise, sPromise, sPromise) : Promise<string>
->s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s10 : Promise<unknown>
->then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sPromise : (x: any) => Promise<string>
 >sPromise : (x: any) => Promise<string>
 >sPromise : (x: any) => Promise<string>
@@ -1132,9 +1132,9 @@ var s10d = s10.then(sPromise, sPromise, sPromise); // ok
 var s10e = s10.then(nIPromise, nPromise, nIPromise); // ok
 >s10e : Promise<IPromise<number>>
 >s10.then(nIPromise, nPromise, nIPromise) : Promise<IPromise<number>>
->s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s10 : Promise<unknown>
->then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >nIPromise : (x: any) => IPromise<number>
 >nPromise : (x: any) => Promise<number>
 >nIPromise : (x: any) => IPromise<number>
@@ -1142,9 +1142,9 @@ var s10e = s10.then(nIPromise, nPromise, nIPromise); // ok
 var s10f = s10.then(testFunctionP, sIPromise, nIPromise); // error
 >s10f : any
 >s10.then(testFunctionP, sIPromise, nIPromise) : any
->s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s10 : Promise<unknown>
->then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunctionP : () => Promise<number>
 >sIPromise : (x: any) => IPromise<string>
 >nIPromise : (x: any) => IPromise<number>
@@ -1152,15 +1152,15 @@ var s10f = s10.then(testFunctionP, sIPromise, nIPromise); // error
 var s10g = s10.then(testFunctionP, nIPromise, sIPromise).then(sPromise, sIPromise, sIPromise); // ok
 >s10g : Promise<IPromise<string>>
 >s10.then(testFunctionP, nIPromise, sIPromise).then(sPromise, sIPromise, sIPromise) : Promise<IPromise<string>>
->s10.then(testFunctionP, nIPromise, sIPromise).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s10.then(testFunctionP, nIPromise, sIPromise).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s10.then(testFunctionP, nIPromise, sIPromise) : Promise<IPromise<number>>
->s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s10 : Promise<unknown>
->then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunctionP : () => Promise<number>
 >nIPromise : (x: any) => IPromise<number>
 >sIPromise : (x: any) => IPromise<string>
->then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sPromise : (x: any) => Promise<string>
 >sIPromise : (x: any) => IPromise<string>
 >sIPromise : (x: any) => IPromise<string>
@@ -1184,9 +1184,9 @@ var s11: Promise<number>;
 var s11a = s11.then(testFunction11, testFunction11, testFunction11); // ok
 >s11a : any
 >s11.then(testFunction11, testFunction11, testFunction11) : any
->s11.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s11.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s11 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction11 : { (x: number): IPromise<number>; (x: string): IPromise<string>; }
 >testFunction11 : { (x: number): IPromise<number>; (x: string): IPromise<string>; }
 >testFunction11 : { (x: number): IPromise<number>; (x: string): IPromise<string>; }
@@ -1194,9 +1194,9 @@ var s11a = s11.then(testFunction11, testFunction11, testFunction11); // ok
 var s11b = s11.then(testFunction11P, testFunction11P, testFunction11P); // error
 >s11b : any
 >s11.then(testFunction11P, testFunction11P, testFunction11P) : any
->s11.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s11.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s11 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction11P : { (x: number): Promise<number>; (x: string): Promise<string>; }
 >testFunction11P : { (x: number): Promise<number>; (x: string): Promise<string>; }
 >testFunction11P : { (x: number): Promise<number>; (x: string): Promise<string>; }
@@ -1204,9 +1204,9 @@ var s11b = s11.then(testFunction11P, testFunction11P, testFunction11P); // error
 var s11c = s11.then(testFunction11P, testFunction11, testFunction11); // error
 >s11c : any
 >s11.then(testFunction11P, testFunction11, testFunction11) : any
->s11.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s11.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s11 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction11P : { (x: number): Promise<number>; (x: string): Promise<string>; }
 >testFunction11 : { (x: number): IPromise<number>; (x: string): IPromise<string>; }
 >testFunction11 : { (x: number): IPromise<number>; (x: string): IPromise<string>; }
diff --git a/tests/baselines/reference/promisePermutations2.errors.txt b/tests/baselines/reference/promisePermutations2.errors.txt
index d601a5049bf59..52324fcb01dc1 100644
--- a/tests/baselines/reference/promisePermutations2.errors.txt
+++ b/tests/baselines/reference/promisePermutations2.errors.txt
@@ -82,7 +82,7 @@ tests/cases/compiler/promisePermutations2.ts(158,21): error TS2345: Argument of
 tests/cases/compiler/promisePermutations2.ts(159,21): error TS2345: Argument of type '{ (x: number): Promise<number>; (x: string): Promise<string>; }' is not assignable to parameter of type '(value: number) => IPromise<string>'.
   Type 'Promise<number>' is not assignable to type 'IPromise<string>'.
     Types of property 'then' are incompatible.
-      Type '{ <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }' is not assignable to type '{ <U>(success?: (value: string) => IPromise<U>, error?: (error: any) => IPromise<U>, progress?: (progress: any) => void): IPromise<U>; <U>(success?: (value: string) => IPromise<U>, error?: (error: any) => U, progress?: (progress: any) => void): IPromise<U>; <U>(success?: (value: string) => U, error?: (error: any) => IPromise<U>, progress?: (progress: any) => void): IPromise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): IPromise<U>; }'.
+      Type '{ <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }' is not assignable to type '{ <U>(success?: (value: string) => IPromise<U>, error?: (error: any) => IPromise<U>, progress?: (progress: any) => void): IPromise<U>; <U>(success?: (value: string) => IPromise<U>, error?: (error: any) => U, progress?: (progress: any) => void): IPromise<U>; <U>(success?: (value: string) => U, error?: (error: any) => IPromise<U>, progress?: (progress: any) => void): IPromise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): IPromise<U>; }'.
         Types of parameters 'onfulfilled' and 'success' are incompatible.
           Types of parameters 'value' and 'value' are incompatible.
             Type 'number' is not assignable to type 'string'.
@@ -378,7 +378,7 @@ tests/cases/compiler/promisePermutations2.ts(159,21): error TS2345: Argument of
 !!! error TS2345: Argument of type '{ (x: number): Promise<number>; (x: string): Promise<string>; }' is not assignable to parameter of type '(value: number) => IPromise<string>'.
 !!! error TS2345:   Type 'Promise<number>' is not assignable to type 'IPromise<string>'.
 !!! error TS2345:     Types of property 'then' are incompatible.
-!!! error TS2345:       Type '{ <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }' is not assignable to type '{ <U>(success?: (value: string) => IPromise<U>, error?: (error: any) => IPromise<U>, progress?: (progress: any) => void): IPromise<U>; <U>(success?: (value: string) => IPromise<U>, error?: (error: any) => U, progress?: (progress: any) => void): IPromise<U>; <U>(success?: (value: string) => U, error?: (error: any) => IPromise<U>, progress?: (progress: any) => void): IPromise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): IPromise<U>; }'.
+!!! error TS2345:       Type '{ <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }' is not assignable to type '{ <U>(success?: (value: string) => IPromise<U>, error?: (error: any) => IPromise<U>, progress?: (progress: any) => void): IPromise<U>; <U>(success?: (value: string) => IPromise<U>, error?: (error: any) => U, progress?: (progress: any) => void): IPromise<U>; <U>(success?: (value: string) => U, error?: (error: any) => IPromise<U>, progress?: (progress: any) => void): IPromise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): IPromise<U>; }'.
 !!! error TS2345:         Types of parameters 'onfulfilled' and 'success' are incompatible.
 !!! error TS2345:           Types of parameters 'value' and 'value' are incompatible.
 !!! error TS2345:             Type 'number' is not assignable to type 'string'.
diff --git a/tests/baselines/reference/promisePermutations2.types b/tests/baselines/reference/promisePermutations2.types
index 957b548a284b8..274534cb0b8c8 100644
--- a/tests/baselines/reference/promisePermutations2.types
+++ b/tests/baselines/reference/promisePermutations2.types
@@ -3,7 +3,7 @@
 
 interface Promise<T> {
     then<U>(success?: (value: T) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>;
->then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: T) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: T) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >success : (value: T) => U
 >value : T
 >error : (error: any) => U
@@ -247,9 +247,9 @@ var s1: Promise<number>;
 var s1a = s1.then(testFunction, testFunction, testFunction);
 >s1a : Promise<IPromise<number>>
 >s1.then(testFunction, testFunction, testFunction) : Promise<IPromise<number>>
->s1.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s1.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s1 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction : () => IPromise<number>
 >testFunction : () => IPromise<number>
 >testFunction : () => IPromise<number>
@@ -257,9 +257,9 @@ var s1a = s1.then(testFunction, testFunction, testFunction);
 var s1b = s1.then(testFunctionP, testFunctionP, testFunctionP);
 >s1b : Promise<Promise<number>>
 >s1.then(testFunctionP, testFunctionP, testFunctionP) : Promise<Promise<number>>
->s1.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s1.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s1 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunctionP : () => Promise<number>
 >testFunctionP : () => Promise<number>
 >testFunctionP : () => Promise<number>
@@ -267,9 +267,9 @@ var s1b = s1.then(testFunctionP, testFunctionP, testFunctionP);
 var s1c = s1.then(testFunctionP, testFunction, testFunction);
 >s1c : Promise<IPromise<number>>
 >s1.then(testFunctionP, testFunction, testFunction) : Promise<IPromise<number>>
->s1.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s1.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s1 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunctionP : () => Promise<number>
 >testFunction : () => IPromise<number>
 >testFunction : () => IPromise<number>
@@ -277,15 +277,15 @@ var s1c = s1.then(testFunctionP, testFunction, testFunction);
 var s1d = s1.then(testFunctionP, testFunction, testFunction).then(testFunction, testFunction, testFunction);
 >s1d : Promise<IPromise<number>>
 >s1.then(testFunctionP, testFunction, testFunction).then(testFunction, testFunction, testFunction) : Promise<IPromise<number>>
->s1.then(testFunctionP, testFunction, testFunction).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s1.then(testFunctionP, testFunction, testFunction).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s1.then(testFunctionP, testFunction, testFunction) : Promise<IPromise<number>>
->s1.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s1.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s1 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunctionP : () => Promise<number>
 >testFunction : () => IPromise<number>
 >testFunction : () => IPromise<number>
->then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction : () => IPromise<number>
 >testFunction : () => IPromise<number>
 >testFunction : () => IPromise<number>
@@ -327,9 +327,9 @@ var s2: Promise<{ x: number; }>;
 var s2a = s2.then(testFunction2, testFunction2, testFunction2);
 >s2a : Promise<IPromise<{ x: number; }>>
 >s2.then(testFunction2, testFunction2, testFunction2) : Promise<IPromise<{ x: number; }>>
->s2.then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s2.then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s2 : Promise<{ x: number; }>
->then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction2 : () => IPromise<{ x: number; }>
 >testFunction2 : () => IPromise<{ x: number; }>
 >testFunction2 : () => IPromise<{ x: number; }>
@@ -337,9 +337,9 @@ var s2a = s2.then(testFunction2, testFunction2, testFunction2);
 var s2b = s2.then(testFunction2P, testFunction2P, testFunction2P);
 >s2b : Promise<Promise<{ x: number; }>>
 >s2.then(testFunction2P, testFunction2P, testFunction2P) : Promise<Promise<{ x: number; }>>
->s2.then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s2.then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s2 : Promise<{ x: number; }>
->then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction2P : () => Promise<{ x: number; }>
 >testFunction2P : () => Promise<{ x: number; }>
 >testFunction2P : () => Promise<{ x: number; }>
@@ -347,9 +347,9 @@ var s2b = s2.then(testFunction2P, testFunction2P, testFunction2P);
 var s2c = s2.then(testFunction2P, testFunction2, testFunction2);
 >s2c : Promise<IPromise<{ x: number; }>>
 >s2.then(testFunction2P, testFunction2, testFunction2) : Promise<IPromise<{ x: number; }>>
->s2.then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s2.then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s2 : Promise<{ x: number; }>
->then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction2P : () => Promise<{ x: number; }>
 >testFunction2 : () => IPromise<{ x: number; }>
 >testFunction2 : () => IPromise<{ x: number; }>
@@ -357,15 +357,15 @@ var s2c = s2.then(testFunction2P, testFunction2, testFunction2);
 var s2d = s2.then(testFunction2P, testFunction2, testFunction2).then(testFunction2, testFunction2, testFunction2);
 >s2d : Promise<IPromise<{ x: number; }>>
 >s2.then(testFunction2P, testFunction2, testFunction2).then(testFunction2, testFunction2, testFunction2) : Promise<IPromise<{ x: number; }>>
->s2.then(testFunction2P, testFunction2, testFunction2).then : { <TResult1 = IPromise<{ x: number; }>, TResult2 = never>(onfulfilled?: (value: IPromise<{ x: number; }>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<{ x: number; }>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s2.then(testFunction2P, testFunction2, testFunction2).then : { <TResult1 = IPromise<{ x: number; }>, TResult2 = never>(onfulfilled?: (value: IPromise<{ x: number; }>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<{ x: number; }>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s2.then(testFunction2P, testFunction2, testFunction2) : Promise<IPromise<{ x: number; }>>
->s2.then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s2.then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s2 : Promise<{ x: number; }>
->then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction2P : () => Promise<{ x: number; }>
 >testFunction2 : () => IPromise<{ x: number; }>
 >testFunction2 : () => IPromise<{ x: number; }>
->then : { <TResult1 = IPromise<{ x: number; }>, TResult2 = never>(onfulfilled?: (value: IPromise<{ x: number; }>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<{ x: number; }>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = IPromise<{ x: number; }>, TResult2 = never>(onfulfilled?: (value: IPromise<{ x: number; }>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<{ x: number; }>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction2 : () => IPromise<{ x: number; }>
 >testFunction2 : () => IPromise<{ x: number; }>
 >testFunction2 : () => IPromise<{ x: number; }>
@@ -405,9 +405,9 @@ var s3: Promise<number>;
 var s3a = s3.then(testFunction3, testFunction3, testFunction3);
 >s3a : Promise<IPromise<number>>
 >s3.then(testFunction3, testFunction3, testFunction3) : Promise<IPromise<number>>
->s3.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s3.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s3 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction3 : (x: number) => IPromise<number>
 >testFunction3 : (x: number) => IPromise<number>
 >testFunction3 : (x: number) => IPromise<number>
@@ -415,9 +415,9 @@ var s3a = s3.then(testFunction3, testFunction3, testFunction3);
 var s3b = s3.then(testFunction3P, testFunction3P, testFunction3P);
 >s3b : Promise<Promise<number>>
 >s3.then(testFunction3P, testFunction3P, testFunction3P) : Promise<Promise<number>>
->s3.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s3.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s3 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction3P : (x: number) => Promise<number>
 >testFunction3P : (x: number) => Promise<number>
 >testFunction3P : (x: number) => Promise<number>
@@ -425,9 +425,9 @@ var s3b = s3.then(testFunction3P, testFunction3P, testFunction3P);
 var s3c = s3.then(testFunction3P, testFunction3, testFunction3);
 >s3c : Promise<IPromise<number>>
 >s3.then(testFunction3P, testFunction3, testFunction3) : Promise<IPromise<number>>
->s3.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s3.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s3 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction3P : (x: number) => Promise<number>
 >testFunction3 : (x: number) => IPromise<number>
 >testFunction3 : (x: number) => IPromise<number>
@@ -435,15 +435,15 @@ var s3c = s3.then(testFunction3P, testFunction3, testFunction3);
 var s3d = s3.then(testFunction3P, testFunction3, testFunction3).then(testFunction3, testFunction3, testFunction3); // Should error
 >s3d : any
 >s3.then(testFunction3P, testFunction3, testFunction3).then(testFunction3, testFunction3, testFunction3) : any
->s3.then(testFunction3P, testFunction3, testFunction3).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s3.then(testFunction3P, testFunction3, testFunction3).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s3.then(testFunction3P, testFunction3, testFunction3) : Promise<IPromise<number>>
->s3.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s3.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s3 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction3P : (x: number) => Promise<number>
 >testFunction3 : (x: number) => IPromise<number>
 >testFunction3 : (x: number) => IPromise<number>
->then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction3 : (x: number) => IPromise<number>
 >testFunction3 : (x: number) => IPromise<number>
 >testFunction3 : (x: number) => IPromise<number>
@@ -491,9 +491,9 @@ var s4: Promise<string>;
 var s4a = s4.then(testFunction4, testFunction4, testFunction4); // error
 >s4a : any
 >s4.then(testFunction4, testFunction4, testFunction4) : any
->s4.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s4.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s4 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction4 : (x: number, y?: string) => IPromise<string>
 >testFunction4 : (x: number, y?: string) => IPromise<string>
 >testFunction4 : (x: number, y?: string) => IPromise<string>
@@ -501,9 +501,9 @@ var s4a = s4.then(testFunction4, testFunction4, testFunction4); // error
 var s4b = s4.then(testFunction4P, testFunction4P, testFunction4P); // error 
 >s4b : any
 >s4.then(testFunction4P, testFunction4P, testFunction4P) : any
->s4.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s4.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s4 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction4P : (x: number, y?: string) => Promise<string>
 >testFunction4P : (x: number, y?: string) => Promise<string>
 >testFunction4P : (x: number, y?: string) => Promise<string>
@@ -511,9 +511,9 @@ var s4b = s4.then(testFunction4P, testFunction4P, testFunction4P); // error
 var s4c = s4.then(testFunction4P, testFunction4, testFunction4); // error
 >s4c : any
 >s4.then(testFunction4P, testFunction4, testFunction4) : any
->s4.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s4.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s4 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction4P : (x: number, y?: string) => Promise<string>
 >testFunction4 : (x: number, y?: string) => IPromise<string>
 >testFunction4 : (x: number, y?: string) => IPromise<string>
@@ -521,15 +521,15 @@ var s4c = s4.then(testFunction4P, testFunction4, testFunction4); // error
 var s4d = s4.then(sIPromise, testFunction4P, testFunction4).then(sIPromise, testFunction4P, testFunction4);
 >s4d : Promise<IPromise<string>>
 >s4.then(sIPromise, testFunction4P, testFunction4).then(sIPromise, testFunction4P, testFunction4) : Promise<IPromise<string>>
->s4.then(sIPromise, testFunction4P, testFunction4).then : { <TResult1 = IPromise<string>, TResult2 = never>(onfulfilled?: (value: IPromise<string>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<string>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s4.then(sIPromise, testFunction4P, testFunction4).then : { <TResult1 = IPromise<string>, TResult2 = never>(onfulfilled?: (value: IPromise<string>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<string>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s4.then(sIPromise, testFunction4P, testFunction4) : Promise<IPromise<string>>
->s4.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s4.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s4 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sIPromise : (x: any) => IPromise<string>
 >testFunction4P : (x: number, y?: string) => Promise<string>
 >testFunction4 : (x: number, y?: string) => IPromise<string>
->then : { <TResult1 = IPromise<string>, TResult2 = never>(onfulfilled?: (value: IPromise<string>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<string>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = IPromise<string>, TResult2 = never>(onfulfilled?: (value: IPromise<string>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<string>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sIPromise : (x: any) => IPromise<string>
 >testFunction4P : (x: number, y?: string) => Promise<string>
 >testFunction4 : (x: number, y?: string) => IPromise<string>
@@ -569,9 +569,9 @@ var s5: Promise<string>;
 var s5a = s5.then(testFunction5, testFunction5, testFunction5); // error
 >s5a : any
 >s5.then(testFunction5, testFunction5, testFunction5) : any
->s5.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s5.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s5 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction5 : (x: number, cb: (a: string) => string) => IPromise<string>
 >testFunction5 : (x: number, cb: (a: string) => string) => IPromise<string>
 >testFunction5 : (x: number, cb: (a: string) => string) => IPromise<string>
@@ -579,9 +579,9 @@ var s5a = s5.then(testFunction5, testFunction5, testFunction5); // error
 var s5b = s5.then(testFunction5P, testFunction5P, testFunction5P); // error
 >s5b : any
 >s5.then(testFunction5P, testFunction5P, testFunction5P) : any
->s5.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s5.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s5 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction5P : (x: number, cb: (a: string) => string) => Promise<string>
 >testFunction5P : (x: number, cb: (a: string) => string) => Promise<string>
 >testFunction5P : (x: number, cb: (a: string) => string) => Promise<string>
@@ -589,9 +589,9 @@ var s5b = s5.then(testFunction5P, testFunction5P, testFunction5P); // error
 var s5c = s5.then(testFunction5P, testFunction5, testFunction5); // error
 >s5c : any
 >s5.then(testFunction5P, testFunction5, testFunction5) : any
->s5.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s5.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s5 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction5P : (x: number, cb: (a: string) => string) => Promise<string>
 >testFunction5 : (x: number, cb: (a: string) => string) => IPromise<string>
 >testFunction5 : (x: number, cb: (a: string) => string) => IPromise<string>
@@ -599,15 +599,15 @@ var s5c = s5.then(testFunction5P, testFunction5, testFunction5); // error
 var s5d = s5.then(sPromise, sPromise, sPromise).then(sIPromise, sIPromise, sIPromise); // ok
 >s5d : Promise<IPromise<string>>
 >s5.then(sPromise, sPromise, sPromise).then(sIPromise, sIPromise, sIPromise) : Promise<IPromise<string>>
->s5.then(sPromise, sPromise, sPromise).then : { <TResult1 = Promise<string>, TResult2 = never>(onfulfilled?: (value: Promise<string>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: Promise<string>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s5.then(sPromise, sPromise, sPromise).then : { <TResult1 = Promise<string>, TResult2 = never>(onfulfilled?: (value: Promise<string>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: Promise<string>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s5.then(sPromise, sPromise, sPromise) : Promise<Promise<string>>
->s5.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s5.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s5 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sPromise : (x: any) => Promise<string>
 >sPromise : (x: any) => Promise<string>
 >sPromise : (x: any) => Promise<string>
->then : { <TResult1 = Promise<string>, TResult2 = never>(onfulfilled?: (value: Promise<string>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: Promise<string>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = Promise<string>, TResult2 = never>(onfulfilled?: (value: Promise<string>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: Promise<string>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sIPromise : (x: any) => IPromise<string>
 >sIPromise : (x: any) => IPromise<string>
 >sIPromise : (x: any) => IPromise<string>
@@ -647,9 +647,9 @@ var s6: Promise<string>;
 var s6a = s6.then(testFunction6, testFunction6, testFunction6); // error
 >s6a : any
 >s6.then(testFunction6, testFunction6, testFunction6) : any
->s6.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s6.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s6 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction6 : (x: number, cb: <T>(a: T) => T) => IPromise<string>
 >testFunction6 : (x: number, cb: <T>(a: T) => T) => IPromise<string>
 >testFunction6 : (x: number, cb: <T>(a: T) => T) => IPromise<string>
@@ -657,9 +657,9 @@ var s6a = s6.then(testFunction6, testFunction6, testFunction6); // error
 var s6b = s6.then(testFunction6P, testFunction6P, testFunction6P); // error
 >s6b : any
 >s6.then(testFunction6P, testFunction6P, testFunction6P) : any
->s6.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s6.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s6 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction6P : (x: number, cb: <T>(a: T) => T) => Promise<string>
 >testFunction6P : (x: number, cb: <T>(a: T) => T) => Promise<string>
 >testFunction6P : (x: number, cb: <T>(a: T) => T) => Promise<string>
@@ -667,9 +667,9 @@ var s6b = s6.then(testFunction6P, testFunction6P, testFunction6P); // error
 var s6c = s6.then(testFunction6P, testFunction6, testFunction6); // error
 >s6c : any
 >s6.then(testFunction6P, testFunction6, testFunction6) : any
->s6.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s6.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s6 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction6P : (x: number, cb: <T>(a: T) => T) => Promise<string>
 >testFunction6 : (x: number, cb: <T>(a: T) => T) => IPromise<string>
 >testFunction6 : (x: number, cb: <T>(a: T) => T) => IPromise<string>
@@ -677,15 +677,15 @@ var s6c = s6.then(testFunction6P, testFunction6, testFunction6); // error
 var s6d = s6.then(sPromise, sPromise, sPromise).then(sIPromise, sIPromise, sIPromise); // ok
 >s6d : Promise<IPromise<string>>
 >s6.then(sPromise, sPromise, sPromise).then(sIPromise, sIPromise, sIPromise) : Promise<IPromise<string>>
->s6.then(sPromise, sPromise, sPromise).then : { <TResult1 = Promise<string>, TResult2 = never>(onfulfilled?: (value: Promise<string>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: Promise<string>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s6.then(sPromise, sPromise, sPromise).then : { <TResult1 = Promise<string>, TResult2 = never>(onfulfilled?: (value: Promise<string>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: Promise<string>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s6.then(sPromise, sPromise, sPromise) : Promise<Promise<string>>
->s6.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s6.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s6 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sPromise : (x: any) => Promise<string>
 >sPromise : (x: any) => Promise<string>
 >sPromise : (x: any) => Promise<string>
->then : { <TResult1 = Promise<string>, TResult2 = never>(onfulfilled?: (value: Promise<string>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: Promise<string>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = Promise<string>, TResult2 = never>(onfulfilled?: (value: Promise<string>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: Promise<string>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sIPromise : (x: any) => IPromise<string>
 >sIPromise : (x: any) => IPromise<string>
 >sIPromise : (x: any) => IPromise<string>
@@ -811,9 +811,9 @@ var s8: Promise<number>;
 var s8a = s8.then(testFunction8, testFunction8, testFunction8); // error
 >s8a : any
 >s8.then(testFunction8, testFunction8, testFunction8) : any
->s8.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s8.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s8 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction8 : <T>(x: T, cb: (a: T) => T) => IPromise<T>
 >testFunction8 : <T>(x: T, cb: (a: T) => T) => IPromise<T>
 >testFunction8 : <T>(x: T, cb: (a: T) => T) => IPromise<T>
@@ -821,9 +821,9 @@ var s8a = s8.then(testFunction8, testFunction8, testFunction8); // error
 var s8b = s8.then(testFunction8P, testFunction8P, testFunction8P); // error
 >s8b : any
 >s8.then(testFunction8P, testFunction8P, testFunction8P) : any
->s8.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s8.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s8 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction8P : <T>(x: T, cb: (a: T) => T) => Promise<T>
 >testFunction8P : <T>(x: T, cb: (a: T) => T) => Promise<T>
 >testFunction8P : <T>(x: T, cb: (a: T) => T) => Promise<T>
@@ -831,9 +831,9 @@ var s8b = s8.then(testFunction8P, testFunction8P, testFunction8P); // error
 var s8c = s8.then(testFunction8P, testFunction8, testFunction8); // error
 >s8c : any
 >s8.then(testFunction8P, testFunction8, testFunction8) : any
->s8.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s8.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s8 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction8P : <T>(x: T, cb: (a: T) => T) => Promise<T>
 >testFunction8 : <T>(x: T, cb: (a: T) => T) => IPromise<T>
 >testFunction8 : <T>(x: T, cb: (a: T) => T) => IPromise<T>
@@ -841,15 +841,15 @@ var s8c = s8.then(testFunction8P, testFunction8, testFunction8); // error
 var s8d = s8.then(nIPromise, nIPromise, nIPromise).then(nIPromise, nIPromise, nIPromise); // ok
 >s8d : Promise<IPromise<number>>
 >s8.then(nIPromise, nIPromise, nIPromise).then(nIPromise, nIPromise, nIPromise) : Promise<IPromise<number>>
->s8.then(nIPromise, nIPromise, nIPromise).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s8.then(nIPromise, nIPromise, nIPromise).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s8.then(nIPromise, nIPromise, nIPromise) : Promise<IPromise<number>>
->s8.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s8.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s8 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >nIPromise : (x: any) => IPromise<number>
 >nIPromise : (x: any) => IPromise<number>
 >nIPromise : (x: any) => IPromise<number>
->then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >nIPromise : (x: any) => IPromise<number>
 >nIPromise : (x: any) => IPromise<number>
 >nIPromise : (x: any) => IPromise<number>
@@ -919,9 +919,9 @@ var s9: Promise<number>;
 var s9a = s9.then(testFunction9, testFunction9, testFunction9); // error
 >s9a : any
 >s9.then(testFunction9, testFunction9, testFunction9) : any
->s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s9 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction9 : <T>(x: T, cb: <U>(a: U) => U) => IPromise<T>
 >testFunction9 : <T>(x: T, cb: <U>(a: U) => U) => IPromise<T>
 >testFunction9 : <T>(x: T, cb: <U>(a: U) => U) => IPromise<T>
@@ -929,9 +929,9 @@ var s9a = s9.then(testFunction9, testFunction9, testFunction9); // error
 var s9b = s9.then(testFunction9P, testFunction9P, testFunction9P); // error
 >s9b : any
 >s9.then(testFunction9P, testFunction9P, testFunction9P) : any
->s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s9 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction9P : <T>(x: T, cb: <U>(a: U) => U) => Promise<T>
 >testFunction9P : <T>(x: T, cb: <U>(a: U) => U) => Promise<T>
 >testFunction9P : <T>(x: T, cb: <U>(a: U) => U) => Promise<T>
@@ -939,9 +939,9 @@ var s9b = s9.then(testFunction9P, testFunction9P, testFunction9P); // error
 var s9c = s9.then(testFunction9P, testFunction9, testFunction9); // error
 >s9c : any
 >s9.then(testFunction9P, testFunction9, testFunction9) : any
->s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s9 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction9P : <T>(x: T, cb: <U>(a: U) => U) => Promise<T>
 >testFunction9 : <T>(x: T, cb: <U>(a: U) => U) => IPromise<T>
 >testFunction9 : <T>(x: T, cb: <U>(a: U) => U) => IPromise<T>
@@ -949,9 +949,9 @@ var s9c = s9.then(testFunction9P, testFunction9, testFunction9); // error
 var s9d = s9.then(sPromise, sPromise, sPromise); // ok
 >s9d : Promise<Promise<string>>
 >s9.then(sPromise, sPromise, sPromise) : Promise<Promise<string>>
->s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s9 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sPromise : (x: any) => Promise<string>
 >sPromise : (x: any) => Promise<string>
 >sPromise : (x: any) => Promise<string>
@@ -959,9 +959,9 @@ var s9d = s9.then(sPromise, sPromise, sPromise); // ok
 var s9e = s9.then(nPromise, nPromise, nPromise); // ok
 >s9e : Promise<Promise<number>>
 >s9.then(nPromise, nPromise, nPromise) : Promise<Promise<number>>
->s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s9 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >nPromise : (x: any) => Promise<number>
 >nPromise : (x: any) => Promise<number>
 >nPromise : (x: any) => Promise<number>
@@ -969,9 +969,9 @@ var s9e = s9.then(nPromise, nPromise, nPromise); // ok
 var s9f = s9.then(testFunction, sIPromise, nIPromise); // error
 >s9f : any
 >s9.then(testFunction, sIPromise, nIPromise) : any
->s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s9 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction : () => IPromise<number>
 >sIPromise : (x: any) => IPromise<string>
 >nIPromise : (x: any) => IPromise<number>
@@ -979,15 +979,15 @@ var s9f = s9.then(testFunction, sIPromise, nIPromise); // error
 var s9g = s9.then(testFunction, nIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise); // ok
 >s9g : Promise<IPromise<string>>
 >s9.then(testFunction, nIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise) : Promise<IPromise<string>>
->s9.then(testFunction, nIPromise, sIPromise).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s9.then(testFunction, nIPromise, sIPromise).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s9.then(testFunction, nIPromise, sIPromise) : Promise<IPromise<number>>
->s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s9 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction : () => IPromise<number>
 >nIPromise : (x: any) => IPromise<number>
 >sIPromise : (x: any) => IPromise<string>
->then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sIPromise : (x: any) => IPromise<string>
 >sIPromise : (x: any) => IPromise<string>
 >sIPromise : (x: any) => IPromise<string>
@@ -1067,9 +1067,9 @@ var s10 = testFunction10P(x => x);
 var s10a = s10.then(testFunction10, testFunction10, testFunction10); // ok
 >s10a : Promise<IPromise<unknown>>
 >s10.then(testFunction10, testFunction10, testFunction10) : Promise<IPromise<unknown>>
->s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s10 : Promise<unknown>
->then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction10 : <T>(cb: <U>(a: U) => U) => IPromise<T>
 >testFunction10 : <T>(cb: <U>(a: U) => U) => IPromise<T>
 >testFunction10 : <T>(cb: <U>(a: U) => U) => IPromise<T>
@@ -1077,9 +1077,9 @@ var s10a = s10.then(testFunction10, testFunction10, testFunction10); // ok
 var s10b = s10.then(testFunction10P, testFunction10P, testFunction10P); // ok
 >s10b : Promise<Promise<unknown>>
 >s10.then(testFunction10P, testFunction10P, testFunction10P) : Promise<Promise<unknown>>
->s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s10 : Promise<unknown>
->then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction10P : <T>(cb: <U>(a: U) => U) => Promise<T>
 >testFunction10P : <T>(cb: <U>(a: U) => U) => Promise<T>
 >testFunction10P : <T>(cb: <U>(a: U) => U) => Promise<T>
@@ -1087,9 +1087,9 @@ var s10b = s10.then(testFunction10P, testFunction10P, testFunction10P); // ok
 var s10c = s10.then(testFunction10P, testFunction10, testFunction10); // ok
 >s10c : Promise<IPromise<unknown>>
 >s10.then(testFunction10P, testFunction10, testFunction10) : Promise<IPromise<unknown>>
->s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s10 : Promise<unknown>
->then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction10P : <T>(cb: <U>(a: U) => U) => Promise<T>
 >testFunction10 : <T>(cb: <U>(a: U) => U) => IPromise<T>
 >testFunction10 : <T>(cb: <U>(a: U) => U) => IPromise<T>
@@ -1097,9 +1097,9 @@ var s10c = s10.then(testFunction10P, testFunction10, testFunction10); // ok
 var s10d = s10.then(sPromise, sPromise, sPromise); // ok
 >s10d : Promise<Promise<string>>
 >s10.then(sPromise, sPromise, sPromise) : Promise<Promise<string>>
->s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s10 : Promise<unknown>
->then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sPromise : (x: any) => Promise<string>
 >sPromise : (x: any) => Promise<string>
 >sPromise : (x: any) => Promise<string>
@@ -1107,9 +1107,9 @@ var s10d = s10.then(sPromise, sPromise, sPromise); // ok
 var s10e = s10.then(nIPromise, nPromise, nIPromise); // ok
 >s10e : Promise<IPromise<number>>
 >s10.then(nIPromise, nPromise, nIPromise) : Promise<IPromise<number>>
->s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s10 : Promise<unknown>
->then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >nIPromise : (x: any) => IPromise<number>
 >nPromise : (x: any) => Promise<number>
 >nIPromise : (x: any) => IPromise<number>
@@ -1117,9 +1117,9 @@ var s10e = s10.then(nIPromise, nPromise, nIPromise); // ok
 var s10f = s10.then(testFunctionP, sIPromise, nIPromise); // error
 >s10f : any
 >s10.then(testFunctionP, sIPromise, nIPromise) : any
->s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s10 : Promise<unknown>
->then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunctionP : () => Promise<number>
 >sIPromise : (x: any) => IPromise<string>
 >nIPromise : (x: any) => IPromise<number>
@@ -1127,15 +1127,15 @@ var s10f = s10.then(testFunctionP, sIPromise, nIPromise); // error
 var s10g = s10.then(testFunctionP, nIPromise, sIPromise).then(sPromise, sIPromise, sIPromise); // ok
 >s10g : Promise<IPromise<string>>
 >s10.then(testFunctionP, nIPromise, sIPromise).then(sPromise, sIPromise, sIPromise) : Promise<IPromise<string>>
->s10.then(testFunctionP, nIPromise, sIPromise).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s10.then(testFunctionP, nIPromise, sIPromise).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s10.then(testFunctionP, nIPromise, sIPromise) : Promise<IPromise<number>>
->s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s10 : Promise<unknown>
->then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunctionP : () => Promise<number>
 >nIPromise : (x: any) => IPromise<number>
 >sIPromise : (x: any) => IPromise<string>
->then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sPromise : (x: any) => Promise<string>
 >sIPromise : (x: any) => IPromise<string>
 >sIPromise : (x: any) => IPromise<string>
@@ -1159,9 +1159,9 @@ var s11: Promise<number>;
 var s11a = s11.then(testFunction11, testFunction11, testFunction11); // ok
 >s11a : any
 >s11.then(testFunction11, testFunction11, testFunction11) : any
->s11.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s11.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s11 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction11 : { (x: number): IPromise<number>; (x: string): IPromise<string>; }
 >testFunction11 : { (x: number): IPromise<number>; (x: string): IPromise<string>; }
 >testFunction11 : { (x: number): IPromise<number>; (x: string): IPromise<string>; }
@@ -1169,9 +1169,9 @@ var s11a = s11.then(testFunction11, testFunction11, testFunction11); // ok
 var s11b = s11.then(testFunction11P, testFunction11P, testFunction11P); // ok
 >s11b : any
 >s11.then(testFunction11P, testFunction11P, testFunction11P) : any
->s11.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s11.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s11 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction11P : { (x: number): Promise<number>; (x: string): Promise<string>; }
 >testFunction11P : { (x: number): Promise<number>; (x: string): Promise<string>; }
 >testFunction11P : { (x: number): Promise<number>; (x: string): Promise<string>; }
@@ -1179,9 +1179,9 @@ var s11b = s11.then(testFunction11P, testFunction11P, testFunction11P); // ok
 var s11c = s11.then(testFunction11P, testFunction11, testFunction11); // ok
 >s11c : any
 >s11.then(testFunction11P, testFunction11, testFunction11) : any
->s11.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s11.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s11 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction11P : { (x: number): Promise<number>; (x: string): Promise<string>; }
 >testFunction11 : { (x: number): IPromise<number>; (x: string): IPromise<string>; }
 >testFunction11 : { (x: number): IPromise<number>; (x: string): IPromise<string>; }
diff --git a/tests/baselines/reference/promisePermutations3.errors.txt b/tests/baselines/reference/promisePermutations3.errors.txt
index d3574d2a4c3f3..71438907d30f0 100644
--- a/tests/baselines/reference/promisePermutations3.errors.txt
+++ b/tests/baselines/reference/promisePermutations3.errors.txt
@@ -103,7 +103,7 @@ tests/cases/compiler/promisePermutations3.ts(159,21): error TS2769: No overload
     Argument of type '{ (x: number): Promise<number>; (x: string): Promise<string>; }' is not assignable to parameter of type '(value: number) => IPromise<string>'.
       Type 'Promise<number>' is not assignable to type 'IPromise<string>'.
         Types of property 'then' are incompatible.
-          Type '{ <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }' is not assignable to type '<U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void) => IPromise<U>'.
+          Type '{ <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }' is not assignable to type '<U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void) => IPromise<U>'.
             Types of parameters 'onfulfilled' and 'success' are incompatible.
               Types of parameters 'value' and 'value' are incompatible.
                 Type 'number' is not assignable to type 'string'.
@@ -431,7 +431,7 @@ tests/cases/compiler/promisePermutations3.ts(165,21): error TS2345: Argument of
 !!! error TS2769:     Argument of type '{ (x: number): Promise<number>; (x: string): Promise<string>; }' is not assignable to parameter of type '(value: number) => IPromise<string>'.
 !!! error TS2769:       Type 'Promise<number>' is not assignable to type 'IPromise<string>'.
 !!! error TS2769:         Types of property 'then' are incompatible.
-!!! error TS2769:           Type '{ <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }' is not assignable to type '<U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void) => IPromise<U>'.
+!!! error TS2769:           Type '{ <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }' is not assignable to type '<U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void) => IPromise<U>'.
 !!! error TS2769:             Types of parameters 'onfulfilled' and 'success' are incompatible.
 !!! error TS2769:               Types of parameters 'value' and 'value' are incompatible.
 !!! error TS2769:                 Type 'number' is not assignable to type 'string'.
diff --git a/tests/baselines/reference/promisePermutations3.types b/tests/baselines/reference/promisePermutations3.types
index a643b89b23ba9..0ff508a2966d6 100644
--- a/tests/baselines/reference/promisePermutations3.types
+++ b/tests/baselines/reference/promisePermutations3.types
@@ -3,7 +3,7 @@
 
 interface Promise<T> {
     then<U>(success?: (value: T) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>;
->then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >success : (value: T) => Promise<U>
 >value : T
 >error : (error: any) => Promise<U>
@@ -12,7 +12,7 @@ interface Promise<T> {
 >progress : any
 
     then<U>(success?: (value: T) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>;
->then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >success : (value: T) => Promise<U>
 >value : T
 >error : (error: any) => U
@@ -21,7 +21,7 @@ interface Promise<T> {
 >progress : any
 
     then<U>(success?: (value: T) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>;
->then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >success : (value: T) => U
 >value : T
 >error : (error: any) => Promise<U>
@@ -30,7 +30,7 @@ interface Promise<T> {
 >progress : any
 
     then<U>(success?: (value: T) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>;
->then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: T) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >success : (value: T) => U
 >value : T
 >error : (error: any) => U
@@ -247,9 +247,9 @@ var s1: Promise<number>;
 var s1a = s1.then(testFunction, testFunction, testFunction);
 >s1a : Promise<IPromise<number>>
 >s1.then(testFunction, testFunction, testFunction) : Promise<IPromise<number>>
->s1.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s1.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s1 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction : () => IPromise<number>
 >testFunction : () => IPromise<number>
 >testFunction : () => IPromise<number>
@@ -257,9 +257,9 @@ var s1a = s1.then(testFunction, testFunction, testFunction);
 var s1b = s1.then(testFunctionP, testFunctionP, testFunctionP);
 >s1b : Promise<number>
 >s1.then(testFunctionP, testFunctionP, testFunctionP) : Promise<number>
->s1.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s1.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s1 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunctionP : () => Promise<number>
 >testFunctionP : () => Promise<number>
 >testFunctionP : () => Promise<number>
@@ -267,9 +267,9 @@ var s1b = s1.then(testFunctionP, testFunctionP, testFunctionP);
 var s1c = s1.then(testFunctionP, testFunction, testFunction);
 >s1c : Promise<IPromise<number>>
 >s1.then(testFunctionP, testFunction, testFunction) : Promise<IPromise<number>>
->s1.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s1.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s1 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunctionP : () => Promise<number>
 >testFunction : () => IPromise<number>
 >testFunction : () => IPromise<number>
@@ -277,15 +277,15 @@ var s1c = s1.then(testFunctionP, testFunction, testFunction);
 var s1d = s1.then(testFunctionP, testFunction, testFunction).then(testFunction, testFunction, testFunction);
 >s1d : Promise<IPromise<number>>
 >s1.then(testFunctionP, testFunction, testFunction).then(testFunction, testFunction, testFunction) : Promise<IPromise<number>>
->s1.then(testFunctionP, testFunction, testFunction).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s1.then(testFunctionP, testFunction, testFunction).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s1.then(testFunctionP, testFunction, testFunction) : Promise<IPromise<number>>
->s1.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s1.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s1 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunctionP : () => Promise<number>
 >testFunction : () => IPromise<number>
 >testFunction : () => IPromise<number>
->then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction : () => IPromise<number>
 >testFunction : () => IPromise<number>
 >testFunction : () => IPromise<number>
@@ -327,9 +327,9 @@ var s2: Promise<{ x: number; }>;
 var s2a = s2.then(testFunction2, testFunction2, testFunction2);
 >s2a : Promise<IPromise<{ x: number; }>>
 >s2.then(testFunction2, testFunction2, testFunction2) : Promise<IPromise<{ x: number; }>>
->s2.then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s2.then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s2 : Promise<{ x: number; }>
->then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction2 : () => IPromise<{ x: number; }>
 >testFunction2 : () => IPromise<{ x: number; }>
 >testFunction2 : () => IPromise<{ x: number; }>
@@ -337,9 +337,9 @@ var s2a = s2.then(testFunction2, testFunction2, testFunction2);
 var s2b = s2.then(testFunction2P, testFunction2P, testFunction2P);
 >s2b : Promise<{ x: number; }>
 >s2.then(testFunction2P, testFunction2P, testFunction2P) : Promise<{ x: number; }>
->s2.then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s2.then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s2 : Promise<{ x: number; }>
->then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction2P : () => Promise<{ x: number; }>
 >testFunction2P : () => Promise<{ x: number; }>
 >testFunction2P : () => Promise<{ x: number; }>
@@ -347,9 +347,9 @@ var s2b = s2.then(testFunction2P, testFunction2P, testFunction2P);
 var s2c = s2.then(testFunction2P, testFunction2, testFunction2);
 >s2c : Promise<IPromise<{ x: number; }>>
 >s2.then(testFunction2P, testFunction2, testFunction2) : Promise<IPromise<{ x: number; }>>
->s2.then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s2.then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s2 : Promise<{ x: number; }>
->then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction2P : () => Promise<{ x: number; }>
 >testFunction2 : () => IPromise<{ x: number; }>
 >testFunction2 : () => IPromise<{ x: number; }>
@@ -357,15 +357,15 @@ var s2c = s2.then(testFunction2P, testFunction2, testFunction2);
 var s2d = s2.then(testFunction2P, testFunction2, testFunction2).then(testFunction2, testFunction2, testFunction2);
 >s2d : Promise<IPromise<{ x: number; }>>
 >s2.then(testFunction2P, testFunction2, testFunction2).then(testFunction2, testFunction2, testFunction2) : Promise<IPromise<{ x: number; }>>
->s2.then(testFunction2P, testFunction2, testFunction2).then : { <TResult1 = IPromise<{ x: number; }>, TResult2 = never>(onfulfilled?: (value: IPromise<{ x: number; }>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<{ x: number; }>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<{ x: number; }>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<{ x: number; }>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<{ x: number; }>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s2.then(testFunction2P, testFunction2, testFunction2).then : { <TResult1 = IPromise<{ x: number; }>, TResult2 = never>(onfulfilled?: (value: IPromise<{ x: number; }>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<{ x: number; }>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<{ x: number; }>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<{ x: number; }>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<{ x: number; }>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s2.then(testFunction2P, testFunction2, testFunction2) : Promise<IPromise<{ x: number; }>>
->s2.then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s2.then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s2 : Promise<{ x: number; }>
->then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = { x: number; }, TResult2 = never>(onfulfilled?: (value: { x: number; }) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: { x: number; }) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction2P : () => Promise<{ x: number; }>
 >testFunction2 : () => IPromise<{ x: number; }>
 >testFunction2 : () => IPromise<{ x: number; }>
->then : { <TResult1 = IPromise<{ x: number; }>, TResult2 = never>(onfulfilled?: (value: IPromise<{ x: number; }>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<{ x: number; }>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<{ x: number; }>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<{ x: number; }>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<{ x: number; }>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = IPromise<{ x: number; }>, TResult2 = never>(onfulfilled?: (value: IPromise<{ x: number; }>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<{ x: number; }>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<{ x: number; }>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<{ x: number; }>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<{ x: number; }>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction2 : () => IPromise<{ x: number; }>
 >testFunction2 : () => IPromise<{ x: number; }>
 >testFunction2 : () => IPromise<{ x: number; }>
@@ -405,9 +405,9 @@ var s3: Promise<number>;
 var s3a = s3.then(testFunction3, testFunction3, testFunction3);
 >s3a : Promise<IPromise<number>>
 >s3.then(testFunction3, testFunction3, testFunction3) : Promise<IPromise<number>>
->s3.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s3.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s3 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction3 : (x: number) => IPromise<number>
 >testFunction3 : (x: number) => IPromise<number>
 >testFunction3 : (x: number) => IPromise<number>
@@ -415,9 +415,9 @@ var s3a = s3.then(testFunction3, testFunction3, testFunction3);
 var s3b = s3.then(testFunction3P, testFunction3P, testFunction3P);
 >s3b : Promise<number>
 >s3.then(testFunction3P, testFunction3P, testFunction3P) : Promise<number>
->s3.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s3.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s3 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction3P : (x: number) => Promise<number>
 >testFunction3P : (x: number) => Promise<number>
 >testFunction3P : (x: number) => Promise<number>
@@ -425,9 +425,9 @@ var s3b = s3.then(testFunction3P, testFunction3P, testFunction3P);
 var s3c = s3.then(testFunction3P, testFunction3, testFunction3);
 >s3c : Promise<IPromise<number>>
 >s3.then(testFunction3P, testFunction3, testFunction3) : Promise<IPromise<number>>
->s3.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s3.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s3 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction3P : (x: number) => Promise<number>
 >testFunction3 : (x: number) => IPromise<number>
 >testFunction3 : (x: number) => IPromise<number>
@@ -435,15 +435,15 @@ var s3c = s3.then(testFunction3P, testFunction3, testFunction3);
 var s3d = s3.then(testFunction3P, testFunction3, testFunction3).then(testFunction3, testFunction3, testFunction3);
 >s3d : any
 >s3.then(testFunction3P, testFunction3, testFunction3).then(testFunction3, testFunction3, testFunction3) : any
->s3.then(testFunction3P, testFunction3, testFunction3).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s3.then(testFunction3P, testFunction3, testFunction3).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s3.then(testFunction3P, testFunction3, testFunction3) : Promise<IPromise<number>>
->s3.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s3.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s3 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction3P : (x: number) => Promise<number>
 >testFunction3 : (x: number) => IPromise<number>
 >testFunction3 : (x: number) => IPromise<number>
->then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction3 : (x: number) => IPromise<number>
 >testFunction3 : (x: number) => IPromise<number>
 >testFunction3 : (x: number) => IPromise<number>
@@ -491,9 +491,9 @@ var s4: Promise<string>;
 var s4a = s4.then(testFunction4, testFunction4, testFunction4); // error
 >s4a : any
 >s4.then(testFunction4, testFunction4, testFunction4) : any
->s4.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s4.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s4 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction4 : (x: number, y?: string) => IPromise<string>
 >testFunction4 : (x: number, y?: string) => IPromise<string>
 >testFunction4 : (x: number, y?: string) => IPromise<string>
@@ -501,9 +501,9 @@ var s4a = s4.then(testFunction4, testFunction4, testFunction4); // error
 var s4b = s4.then(testFunction4P, testFunction4P, testFunction4P); // error 
 >s4b : any
 >s4.then(testFunction4P, testFunction4P, testFunction4P) : any
->s4.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s4.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s4 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction4P : (x: number, y?: string) => Promise<string>
 >testFunction4P : (x: number, y?: string) => Promise<string>
 >testFunction4P : (x: number, y?: string) => Promise<string>
@@ -511,9 +511,9 @@ var s4b = s4.then(testFunction4P, testFunction4P, testFunction4P); // error
 var s4c = s4.then(testFunction4P, testFunction4, testFunction4); // error
 >s4c : any
 >s4.then(testFunction4P, testFunction4, testFunction4) : any
->s4.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s4.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s4 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction4P : (x: number, y?: string) => Promise<string>
 >testFunction4 : (x: number, y?: string) => IPromise<string>
 >testFunction4 : (x: number, y?: string) => IPromise<string>
@@ -521,15 +521,15 @@ var s4c = s4.then(testFunction4P, testFunction4, testFunction4); // error
 var s4d = s4.then(sIPromise, testFunction4P, testFunction4).then(sIPromise, testFunction4P, testFunction4);
 >s4d : Promise<IPromise<string>>
 >s4.then(sIPromise, testFunction4P, testFunction4).then(sIPromise, testFunction4P, testFunction4) : Promise<IPromise<string>>
->s4.then(sIPromise, testFunction4P, testFunction4).then : { <TResult1 = IPromise<string>, TResult2 = never>(onfulfilled?: (value: IPromise<string>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<string>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<string>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<string>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<string>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s4.then(sIPromise, testFunction4P, testFunction4).then : { <TResult1 = IPromise<string>, TResult2 = never>(onfulfilled?: (value: IPromise<string>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<string>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<string>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<string>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<string>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s4.then(sIPromise, testFunction4P, testFunction4) : Promise<IPromise<string>>
->s4.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s4.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s4 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sIPromise : (x: any) => IPromise<string>
 >testFunction4P : (x: number, y?: string) => Promise<string>
 >testFunction4 : (x: number, y?: string) => IPromise<string>
->then : { <TResult1 = IPromise<string>, TResult2 = never>(onfulfilled?: (value: IPromise<string>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<string>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<string>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<string>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<string>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = IPromise<string>, TResult2 = never>(onfulfilled?: (value: IPromise<string>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<string>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<string>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<string>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<string>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sIPromise : (x: any) => IPromise<string>
 >testFunction4P : (x: number, y?: string) => Promise<string>
 >testFunction4 : (x: number, y?: string) => IPromise<string>
@@ -569,9 +569,9 @@ var s5: Promise<string>;
 var s5a = s5.then(testFunction5, testFunction5, testFunction5); // error
 >s5a : any
 >s5.then(testFunction5, testFunction5, testFunction5) : any
->s5.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s5.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s5 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction5 : (x: number, cb: (a: string) => string) => IPromise<string>
 >testFunction5 : (x: number, cb: (a: string) => string) => IPromise<string>
 >testFunction5 : (x: number, cb: (a: string) => string) => IPromise<string>
@@ -579,9 +579,9 @@ var s5a = s5.then(testFunction5, testFunction5, testFunction5); // error
 var s5b = s5.then(testFunction5P, testFunction5P, testFunction5P); // error
 >s5b : any
 >s5.then(testFunction5P, testFunction5P, testFunction5P) : any
->s5.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s5.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s5 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction5P : (x: number, cb: (a: string) => string) => Promise<string>
 >testFunction5P : (x: number, cb: (a: string) => string) => Promise<string>
 >testFunction5P : (x: number, cb: (a: string) => string) => Promise<string>
@@ -589,9 +589,9 @@ var s5b = s5.then(testFunction5P, testFunction5P, testFunction5P); // error
 var s5c = s5.then(testFunction5P, testFunction5, testFunction5); // error
 >s5c : any
 >s5.then(testFunction5P, testFunction5, testFunction5) : any
->s5.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s5.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s5 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction5P : (x: number, cb: (a: string) => string) => Promise<string>
 >testFunction5 : (x: number, cb: (a: string) => string) => IPromise<string>
 >testFunction5 : (x: number, cb: (a: string) => string) => IPromise<string>
@@ -599,15 +599,15 @@ var s5c = s5.then(testFunction5P, testFunction5, testFunction5); // error
 var s5d = s5.then(sPromise, sPromise, sPromise).then(sIPromise, sIPromise, sIPromise); // ok
 >s5d : Promise<IPromise<string>>
 >s5.then(sPromise, sPromise, sPromise).then(sIPromise, sIPromise, sIPromise) : Promise<IPromise<string>>
->s5.then(sPromise, sPromise, sPromise).then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s5.then(sPromise, sPromise, sPromise).then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s5.then(sPromise, sPromise, sPromise) : Promise<string>
->s5.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s5.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s5 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sPromise : (x: any) => Promise<string>
 >sPromise : (x: any) => Promise<string>
 >sPromise : (x: any) => Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sIPromise : (x: any) => IPromise<string>
 >sIPromise : (x: any) => IPromise<string>
 >sIPromise : (x: any) => IPromise<string>
@@ -647,9 +647,9 @@ var s6: Promise<string>;
 var s6a = s6.then(testFunction6, testFunction6, testFunction6); // error
 >s6a : any
 >s6.then(testFunction6, testFunction6, testFunction6) : any
->s6.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s6.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s6 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction6 : (x: number, cb: <T>(a: T) => T) => IPromise<string>
 >testFunction6 : (x: number, cb: <T>(a: T) => T) => IPromise<string>
 >testFunction6 : (x: number, cb: <T>(a: T) => T) => IPromise<string>
@@ -657,9 +657,9 @@ var s6a = s6.then(testFunction6, testFunction6, testFunction6); // error
 var s6b = s6.then(testFunction6P, testFunction6P, testFunction6P); // error
 >s6b : any
 >s6.then(testFunction6P, testFunction6P, testFunction6P) : any
->s6.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s6.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s6 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction6P : (x: number, cb: <T>(a: T) => T) => Promise<string>
 >testFunction6P : (x: number, cb: <T>(a: T) => T) => Promise<string>
 >testFunction6P : (x: number, cb: <T>(a: T) => T) => Promise<string>
@@ -667,9 +667,9 @@ var s6b = s6.then(testFunction6P, testFunction6P, testFunction6P); // error
 var s6c = s6.then(testFunction6P, testFunction6, testFunction6); // error
 >s6c : any
 >s6.then(testFunction6P, testFunction6, testFunction6) : any
->s6.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s6.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s6 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction6P : (x: number, cb: <T>(a: T) => T) => Promise<string>
 >testFunction6 : (x: number, cb: <T>(a: T) => T) => IPromise<string>
 >testFunction6 : (x: number, cb: <T>(a: T) => T) => IPromise<string>
@@ -677,15 +677,15 @@ var s6c = s6.then(testFunction6P, testFunction6, testFunction6); // error
 var s6d = s6.then(sPromise, sPromise, sPromise).then(sIPromise, sIPromise, sIPromise); // ok
 >s6d : Promise<IPromise<string>>
 >s6.then(sPromise, sPromise, sPromise).then(sIPromise, sIPromise, sIPromise) : Promise<IPromise<string>>
->s6.then(sPromise, sPromise, sPromise).then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s6.then(sPromise, sPromise, sPromise).then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s6.then(sPromise, sPromise, sPromise) : Promise<string>
->s6.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s6.then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s6 : Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sPromise : (x: any) => Promise<string>
 >sPromise : (x: any) => Promise<string>
 >sPromise : (x: any) => Promise<string>
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: string) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sIPromise : (x: any) => IPromise<string>
 >sIPromise : (x: any) => IPromise<string>
 >sIPromise : (x: any) => IPromise<string>
@@ -811,9 +811,9 @@ var s8: Promise<number>;
 var s8a = s8.then(testFunction8, testFunction8, testFunction8); // error
 >s8a : any
 >s8.then(testFunction8, testFunction8, testFunction8) : any
->s8.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s8.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s8 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction8 : <T>(x: T, cb: (a: T) => T) => IPromise<T>
 >testFunction8 : <T>(x: T, cb: (a: T) => T) => IPromise<T>
 >testFunction8 : <T>(x: T, cb: (a: T) => T) => IPromise<T>
@@ -821,9 +821,9 @@ var s8a = s8.then(testFunction8, testFunction8, testFunction8); // error
 var s8b = s8.then(testFunction8P, testFunction8P, testFunction8P); // error
 >s8b : any
 >s8.then(testFunction8P, testFunction8P, testFunction8P) : any
->s8.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s8.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s8 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction8P : <T>(x: T, cb: (a: T) => T) => Promise<T>
 >testFunction8P : <T>(x: T, cb: (a: T) => T) => Promise<T>
 >testFunction8P : <T>(x: T, cb: (a: T) => T) => Promise<T>
@@ -831,9 +831,9 @@ var s8b = s8.then(testFunction8P, testFunction8P, testFunction8P); // error
 var s8c = s8.then(testFunction8P, testFunction8, testFunction8); // error
 >s8c : any
 >s8.then(testFunction8P, testFunction8, testFunction8) : any
->s8.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s8.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s8 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction8P : <T>(x: T, cb: (a: T) => T) => Promise<T>
 >testFunction8 : <T>(x: T, cb: (a: T) => T) => IPromise<T>
 >testFunction8 : <T>(x: T, cb: (a: T) => T) => IPromise<T>
@@ -841,15 +841,15 @@ var s8c = s8.then(testFunction8P, testFunction8, testFunction8); // error
 var s8d = s8.then(nIPromise, nIPromise, nIPromise).then(nIPromise, nIPromise, nIPromise); // ok
 >s8d : Promise<IPromise<number>>
 >s8.then(nIPromise, nIPromise, nIPromise).then(nIPromise, nIPromise, nIPromise) : Promise<IPromise<number>>
->s8.then(nIPromise, nIPromise, nIPromise).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s8.then(nIPromise, nIPromise, nIPromise).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s8.then(nIPromise, nIPromise, nIPromise) : Promise<IPromise<number>>
->s8.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s8.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s8 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >nIPromise : (x: any) => IPromise<number>
 >nIPromise : (x: any) => IPromise<number>
 >nIPromise : (x: any) => IPromise<number>
->then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >nIPromise : (x: any) => IPromise<number>
 >nIPromise : (x: any) => IPromise<number>
 >nIPromise : (x: any) => IPromise<number>
@@ -919,9 +919,9 @@ var s9: Promise<number>;
 var s9a = s9.then(testFunction9, testFunction9, testFunction9); // error
 >s9a : any
 >s9.then(testFunction9, testFunction9, testFunction9) : any
->s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s9 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction9 : <T>(x: T, cb: <U>(a: U) => U) => IPromise<T>
 >testFunction9 : <T>(x: T, cb: <U>(a: U) => U) => IPromise<T>
 >testFunction9 : <T>(x: T, cb: <U>(a: U) => U) => IPromise<T>
@@ -929,9 +929,9 @@ var s9a = s9.then(testFunction9, testFunction9, testFunction9); // error
 var s9b = s9.then(testFunction9P, testFunction9P, testFunction9P); // error
 >s9b : any
 >s9.then(testFunction9P, testFunction9P, testFunction9P) : any
->s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s9 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction9P : <T>(x: T, cb: <U>(a: U) => U) => Promise<T>
 >testFunction9P : <T>(x: T, cb: <U>(a: U) => U) => Promise<T>
 >testFunction9P : <T>(x: T, cb: <U>(a: U) => U) => Promise<T>
@@ -939,9 +939,9 @@ var s9b = s9.then(testFunction9P, testFunction9P, testFunction9P); // error
 var s9c = s9.then(testFunction9P, testFunction9, testFunction9); // error
 >s9c : any
 >s9.then(testFunction9P, testFunction9, testFunction9) : any
->s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s9 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction9P : <T>(x: T, cb: <U>(a: U) => U) => Promise<T>
 >testFunction9 : <T>(x: T, cb: <U>(a: U) => U) => IPromise<T>
 >testFunction9 : <T>(x: T, cb: <U>(a: U) => U) => IPromise<T>
@@ -949,9 +949,9 @@ var s9c = s9.then(testFunction9P, testFunction9, testFunction9); // error
 var s9d = s9.then(sPromise, sPromise, sPromise); // ok
 >s9d : Promise<string>
 >s9.then(sPromise, sPromise, sPromise) : Promise<string>
->s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s9 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sPromise : (x: any) => Promise<string>
 >sPromise : (x: any) => Promise<string>
 >sPromise : (x: any) => Promise<string>
@@ -959,9 +959,9 @@ var s9d = s9.then(sPromise, sPromise, sPromise); // ok
 var s9e = s9.then(nPromise, nPromise, nPromise); // ok
 >s9e : Promise<number>
 >s9.then(nPromise, nPromise, nPromise) : Promise<number>
->s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s9 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >nPromise : (x: any) => Promise<number>
 >nPromise : (x: any) => Promise<number>
 >nPromise : (x: any) => Promise<number>
@@ -969,9 +969,9 @@ var s9e = s9.then(nPromise, nPromise, nPromise); // ok
 var s9f = s9.then(testFunction, sIPromise, nIPromise); // error
 >s9f : any
 >s9.then(testFunction, sIPromise, nIPromise) : any
->s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s9 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction : () => IPromise<number>
 >sIPromise : (x: any) => IPromise<string>
 >nIPromise : (x: any) => IPromise<number>
@@ -979,15 +979,15 @@ var s9f = s9.then(testFunction, sIPromise, nIPromise); // error
 var s9g = s9.then(testFunction, nIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise); // ok
 >s9g : Promise<IPromise<string>>
 >s9.then(testFunction, nIPromise, sIPromise).then(sIPromise, sIPromise, sIPromise) : Promise<IPromise<string>>
->s9.then(testFunction, nIPromise, sIPromise).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s9.then(testFunction, nIPromise, sIPromise).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s9.then(testFunction, nIPromise, sIPromise) : Promise<IPromise<number>>
->s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s9.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s9 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction : () => IPromise<number>
 >nIPromise : (x: any) => IPromise<number>
 >sIPromise : (x: any) => IPromise<string>
->then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sIPromise : (x: any) => IPromise<string>
 >sIPromise : (x: any) => IPromise<string>
 >sIPromise : (x: any) => IPromise<string>
@@ -1067,9 +1067,9 @@ var s10 = testFunction10P(x => x);
 var s10a = s10.then(testFunction10, testFunction10, testFunction10); // ok
 >s10a : Promise<IPromise<unknown>>
 >s10.then(testFunction10, testFunction10, testFunction10) : Promise<IPromise<unknown>>
->s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s10 : Promise<unknown>
->then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction10 : <T>(cb: <U>(a: U) => U) => IPromise<T>
 >testFunction10 : <T>(cb: <U>(a: U) => U) => IPromise<T>
 >testFunction10 : <T>(cb: <U>(a: U) => U) => IPromise<T>
@@ -1077,9 +1077,9 @@ var s10a = s10.then(testFunction10, testFunction10, testFunction10); // ok
 var s10b = s10.then(testFunction10P, testFunction10P, testFunction10P); // ok
 >s10b : Promise<unknown>
 >s10.then(testFunction10P, testFunction10P, testFunction10P) : Promise<unknown>
->s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s10 : Promise<unknown>
->then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction10P : <T>(cb: <U>(a: U) => U) => Promise<T>
 >testFunction10P : <T>(cb: <U>(a: U) => U) => Promise<T>
 >testFunction10P : <T>(cb: <U>(a: U) => U) => Promise<T>
@@ -1087,9 +1087,9 @@ var s10b = s10.then(testFunction10P, testFunction10P, testFunction10P); // ok
 var s10c = s10.then(testFunction10P, testFunction10, testFunction10); // ok
 >s10c : Promise<unknown>
 >s10.then(testFunction10P, testFunction10, testFunction10) : Promise<unknown>
->s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s10 : Promise<unknown>
->then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction10P : <T>(cb: <U>(a: U) => U) => Promise<T>
 >testFunction10 : <T>(cb: <U>(a: U) => U) => IPromise<T>
 >testFunction10 : <T>(cb: <U>(a: U) => U) => IPromise<T>
@@ -1097,9 +1097,9 @@ var s10c = s10.then(testFunction10P, testFunction10, testFunction10); // ok
 var s10d = s10.then(sPromise, sPromise, sPromise); // ok
 >s10d : Promise<string>
 >s10.then(sPromise, sPromise, sPromise) : Promise<string>
->s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s10 : Promise<unknown>
->then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sPromise : (x: any) => Promise<string>
 >sPromise : (x: any) => Promise<string>
 >sPromise : (x: any) => Promise<string>
@@ -1107,9 +1107,9 @@ var s10d = s10.then(sPromise, sPromise, sPromise); // ok
 var s10e = s10.then(nIPromise, nPromise, nIPromise); // ok
 >s10e : Promise<IPromise<number>>
 >s10.then(nIPromise, nPromise, nIPromise) : Promise<IPromise<number>>
->s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s10 : Promise<unknown>
->then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >nIPromise : (x: any) => IPromise<number>
 >nPromise : (x: any) => Promise<number>
 >nIPromise : (x: any) => IPromise<number>
@@ -1117,9 +1117,9 @@ var s10e = s10.then(nIPromise, nPromise, nIPromise); // ok
 var s10f = s10.then(testFunctionP, sIPromise, nIPromise); // error
 >s10f : any
 >s10.then(testFunctionP, sIPromise, nIPromise) : any
->s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s10 : Promise<unknown>
->then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunctionP : () => Promise<number>
 >sIPromise : (x: any) => IPromise<string>
 >nIPromise : (x: any) => IPromise<number>
@@ -1127,15 +1127,15 @@ var s10f = s10.then(testFunctionP, sIPromise, nIPromise); // error
 var s10g = s10.then(testFunctionP, nIPromise, sIPromise).then(sPromise, sIPromise, sIPromise); // ok
 >s10g : Promise<IPromise<string>>
 >s10.then(testFunctionP, nIPromise, sIPromise).then(sPromise, sIPromise, sIPromise) : Promise<IPromise<string>>
->s10.then(testFunctionP, nIPromise, sIPromise).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s10.then(testFunctionP, nIPromise, sIPromise).then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s10.then(testFunctionP, nIPromise, sIPromise) : Promise<IPromise<number>>
->s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s10.then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s10 : Promise<unknown>
->then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = unknown, TResult2 = never>(onfulfilled?: (value: unknown) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: unknown) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunctionP : () => Promise<number>
 >nIPromise : (x: any) => IPromise<number>
 >sIPromise : (x: any) => IPromise<string>
->then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = IPromise<number>, TResult2 = never>(onfulfilled?: (value: IPromise<number>) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: IPromise<number>) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >sPromise : (x: any) => Promise<string>
 >sIPromise : (x: any) => IPromise<string>
 >sIPromise : (x: any) => IPromise<string>
@@ -1159,9 +1159,9 @@ var s11: Promise<number>;
 var s11a = s11.then(testFunction11, testFunction11, testFunction11); // ok
 >s11a : any
 >s11.then(testFunction11, testFunction11, testFunction11) : any
->s11.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s11.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s11 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction11 : { (x: number): IPromise<number>; (x: string): IPromise<string>; }
 >testFunction11 : { (x: number): IPromise<number>; (x: string): IPromise<string>; }
 >testFunction11 : { (x: number): IPromise<number>; (x: string): IPromise<string>; }
@@ -1169,9 +1169,9 @@ var s11a = s11.then(testFunction11, testFunction11, testFunction11); // ok
 var s11b = s11.then(testFunction11P, testFunction11P, testFunction11P); // error
 >s11b : any
 >s11.then(testFunction11P, testFunction11P, testFunction11P) : any
->s11.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s11.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s11 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction11P : { (x: number): Promise<number>; (x: string): Promise<string>; }
 >testFunction11P : { (x: number): Promise<number>; (x: string): Promise<string>; }
 >testFunction11P : { (x: number): Promise<number>; (x: string): Promise<string>; }
@@ -1179,9 +1179,9 @@ var s11b = s11.then(testFunction11P, testFunction11P, testFunction11P); // error
 var s11c = s11.then(testFunction11P, testFunction11, testFunction11); // error
 >s11c : any
 >s11.then(testFunction11P, testFunction11, testFunction11) : any
->s11.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>s11.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >s11 : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => Promise<U>, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => Promise<U>, progress?: (progress: any) => void): Promise<U>; <U>(success?: (value: number) => U, error?: (error: any) => U, progress?: (progress: any) => void): Promise<U>; }
 >testFunction11P : { (x: number): Promise<number>; (x: string): Promise<string>; }
 >testFunction11 : { (x: number): IPromise<number>; (x: string): IPromise<string>; }
 >testFunction11 : { (x: number): IPromise<number>; (x: string): IPromise<string>; }
diff --git a/tests/baselines/reference/promiseTest.types b/tests/baselines/reference/promiseTest.types
index 3d250c11c1f87..9d13486017512 100644
--- a/tests/baselines/reference/promiseTest.types
+++ b/tests/baselines/reference/promiseTest.types
@@ -1,12 +1,12 @@
 === tests/cases/compiler/promiseTest.ts ===
 interface Promise<T> {
     then<A>(success?: (value: T) => Promise<A>): Promise<A>;
->then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <A>(success?: (value: T) => Promise<A>): Promise<A>; <B>(success?: (value: T) => B): Promise<B>; }
+>then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <A>(success?: (value: T) => Promise<A>): Promise<A>; <B>(success?: (value: T) => B): Promise<B>; }
 >success : (value: T) => Promise<A>
 >value : T
 
     then<B>(success?: (value: T) => B): Promise<B>;
->then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <A>(success?: (value: T) => Promise<A>): Promise<A>; <B>(success?: (value: T) => B): Promise<B>; }
+>then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <A>(success?: (value: T) => Promise<A>): Promise<A>; <B>(success?: (value: T) => B): Promise<B>; }
 >success : (value: T) => B
 >value : T
 
@@ -21,9 +21,9 @@ var p: Promise<number> = null;
 var p2 = p.then(function (x) {
 >p2 : Promise<number>
 >p.then(function (x) {    return p;} ) : Promise<number>
->p.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <A>(success?: (value: number) => Promise<A>): Promise<A>; <B>(success?: (value: number) => B): Promise<B>; }
+>p.then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <A>(success?: (value: number) => Promise<A>): Promise<A>; <B>(success?: (value: number) => B): Promise<B>; }
 >p : Promise<number>
->then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <A>(success?: (value: number) => Promise<A>): Promise<A>; <B>(success?: (value: number) => B): Promise<B>; }
+>then : { <TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <A>(success?: (value: number) => Promise<A>): Promise<A>; <B>(success?: (value: number) => B): Promise<B>; }
 >function (x) {    return p;} : (x: number) => Promise<number>
 >x : number
 
diff --git a/tests/baselines/reference/promiseType.types b/tests/baselines/reference/promiseType.types
index dd20fb656ea5a..e6a2e17273c1b 100644
--- a/tests/baselines/reference/promiseType.types
+++ b/tests/baselines/reference/promiseType.types
@@ -182,92 +182,92 @@ async function I() {
 const p00 = p.catch();
 >p00 : Promise<boolean>
 >p.catch() : Promise<boolean>
->p.catch : <TResult = never>(onrejected?: (reason: any) => TResult | PromiseLike<TResult>) => Promise<boolean | TResult>
+>p.catch : <TResult = never>(onrejected?: (reason: any) => TResult) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >p : Promise<boolean>
->catch : <TResult = never>(onrejected?: (reason: any) => TResult | PromiseLike<TResult>) => Promise<boolean | TResult>
+>catch : <TResult = never>(onrejected?: (reason: any) => TResult) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 
 const p01 = p.then();
 >p01 : Promise<boolean>
 >p.then() : Promise<boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 
 const p10 = p.catch(undefined);
 >p10 : Promise<boolean>
 >p.catch(undefined) : Promise<boolean>
->p.catch : <TResult = never>(onrejected?: (reason: any) => TResult | PromiseLike<TResult>) => Promise<boolean | TResult>
+>p.catch : <TResult = never>(onrejected?: (reason: any) => TResult) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >p : Promise<boolean>
->catch : <TResult = never>(onrejected?: (reason: any) => TResult | PromiseLike<TResult>) => Promise<boolean | TResult>
+>catch : <TResult = never>(onrejected?: (reason: any) => TResult) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >undefined : undefined
 
 const p11 = p.catch(null);
 >p11 : Promise<boolean>
 >p.catch(null) : Promise<boolean>
->p.catch : <TResult = never>(onrejected?: (reason: any) => TResult | PromiseLike<TResult>) => Promise<boolean | TResult>
+>p.catch : <TResult = never>(onrejected?: (reason: any) => TResult) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >p : Promise<boolean>
->catch : <TResult = never>(onrejected?: (reason: any) => TResult | PromiseLike<TResult>) => Promise<boolean | TResult>
+>catch : <TResult = never>(onrejected?: (reason: any) => TResult) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >null : null
 
 const p12 = p.catch(() => 1);
 >p12 : Promise<number | boolean>
 >p.catch(() => 1) : Promise<number | boolean>
->p.catch : <TResult = never>(onrejected?: (reason: any) => TResult | PromiseLike<TResult>) => Promise<boolean | TResult>
+>p.catch : <TResult = never>(onrejected?: (reason: any) => TResult) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >p : Promise<boolean>
->catch : <TResult = never>(onrejected?: (reason: any) => TResult | PromiseLike<TResult>) => Promise<boolean | TResult>
+>catch : <TResult = never>(onrejected?: (reason: any) => TResult) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >() => 1 : () => number
 >1 : 1
 
 const p13 = p.catch(() => x);
 >p13 : Promise<any>
 >p.catch(() => x) : Promise<any>
->p.catch : <TResult = never>(onrejected?: (reason: any) => TResult | PromiseLike<TResult>) => Promise<boolean | TResult>
+>p.catch : <TResult = never>(onrejected?: (reason: any) => TResult) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >p : Promise<boolean>
->catch : <TResult = never>(onrejected?: (reason: any) => TResult | PromiseLike<TResult>) => Promise<boolean | TResult>
+>catch : <TResult = never>(onrejected?: (reason: any) => TResult) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >() => x : () => any
 >x : any
 
 const p14 = p.catch(() => undefined);
 >p14 : Promise<any>
 >p.catch(() => undefined) : Promise<any>
->p.catch : <TResult = never>(onrejected?: (reason: any) => TResult | PromiseLike<TResult>) => Promise<boolean | TResult>
+>p.catch : <TResult = never>(onrejected?: (reason: any) => TResult) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >p : Promise<boolean>
->catch : <TResult = never>(onrejected?: (reason: any) => TResult | PromiseLike<TResult>) => Promise<boolean | TResult>
+>catch : <TResult = never>(onrejected?: (reason: any) => TResult) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >() => undefined : () => any
 >undefined : undefined
 
 const p15 = p.catch(() => null);
 >p15 : Promise<any>
 >p.catch(() => null) : Promise<any>
->p.catch : <TResult = never>(onrejected?: (reason: any) => TResult | PromiseLike<TResult>) => Promise<boolean | TResult>
+>p.catch : <TResult = never>(onrejected?: (reason: any) => TResult) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >p : Promise<boolean>
->catch : <TResult = never>(onrejected?: (reason: any) => TResult | PromiseLike<TResult>) => Promise<boolean | TResult>
+>catch : <TResult = never>(onrejected?: (reason: any) => TResult) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >() => null : () => any
 >null : null
 
 const p16 = p.catch(() => {});
 >p16 : Promise<boolean | void>
 >p.catch(() => {}) : Promise<boolean | void>
->p.catch : <TResult = never>(onrejected?: (reason: any) => TResult | PromiseLike<TResult>) => Promise<boolean | TResult>
+>p.catch : <TResult = never>(onrejected?: (reason: any) => TResult) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >p : Promise<boolean>
->catch : <TResult = never>(onrejected?: (reason: any) => TResult | PromiseLike<TResult>) => Promise<boolean | TResult>
+>catch : <TResult = never>(onrejected?: (reason: any) => TResult) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >() => {} : () => void
 
 const p17 = p.catch(() => {throw 1});
 >p17 : Promise<boolean>
 >p.catch(() => {throw 1}) : Promise<boolean>
->p.catch : <TResult = never>(onrejected?: (reason: any) => TResult | PromiseLike<TResult>) => Promise<boolean | TResult>
+>p.catch : <TResult = never>(onrejected?: (reason: any) => TResult) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >p : Promise<boolean>
->catch : <TResult = never>(onrejected?: (reason: any) => TResult | PromiseLike<TResult>) => Promise<boolean | TResult>
+>catch : <TResult = never>(onrejected?: (reason: any) => TResult) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >() => {throw 1} : () => never
 >1 : 1
 
 const p18 = p.catch(() => Promise.reject(1));
 >p18 : Promise<boolean>
 >p.catch(() => Promise.reject(1)) : Promise<boolean>
->p.catch : <TResult = never>(onrejected?: (reason: any) => TResult | PromiseLike<TResult>) => Promise<boolean | TResult>
+>p.catch : <TResult = never>(onrejected?: (reason: any) => TResult) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >p : Promise<boolean>
->catch : <TResult = never>(onrejected?: (reason: any) => TResult | PromiseLike<TResult>) => Promise<boolean | TResult>
+>catch : <TResult = never>(onrejected?: (reason: any) => TResult) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >() => Promise.reject(1) : () => Promise<never>
 >Promise.reject(1) : Promise<never>
 >Promise.reject : <T = never>(reason?: any) => Promise<T>
@@ -278,9 +278,9 @@ const p18 = p.catch(() => Promise.reject(1));
 const p19 = p.catch(() => Promise.resolve(1));
 >p19 : Promise<number | boolean>
 >p.catch(() => Promise.resolve(1)) : Promise<number | boolean>
->p.catch : <TResult = never>(onrejected?: (reason: any) => TResult | PromiseLike<TResult>) => Promise<boolean | TResult>
+>p.catch : <TResult = never>(onrejected?: (reason: any) => TResult) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >p : Promise<boolean>
->catch : <TResult = never>(onrejected?: (reason: any) => TResult | PromiseLike<TResult>) => Promise<boolean | TResult>
+>catch : <TResult = never>(onrejected?: (reason: any) => TResult) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >() => Promise.resolve(1) : () => Promise<number>
 >Promise.resolve(1) : Promise<number>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
@@ -291,78 +291,78 @@ const p19 = p.catch(() => Promise.resolve(1));
 const p20 = p.then(undefined);
 >p20 : Promise<boolean>
 >p.then(undefined) : Promise<boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >undefined : undefined
 
 const p21 = p.then(null);
 >p21 : Promise<boolean>
 >p.then(null) : Promise<boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >null : null
 
 const p22 = p.then(() => 1);
 >p22 : Promise<number>
 >p.then(() => 1) : Promise<number>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => 1 : () => number
 >1 : 1
 
 const p23 = p.then(() => x);
 >p23 : Promise<any>
 >p.then(() => x) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => x : () => any
 >x : any
 
 const p24 = p.then(() => undefined);
 >p24 : Promise<any>
 >p.then(() => undefined) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => undefined : () => any
 >undefined : undefined
 
 const p25 = p.then(() => null);
 >p25 : Promise<any>
 >p.then(() => null) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => null : () => any
 >null : null
 
 const p26 = p.then(() => {});
 >p26 : Promise<void>
 >p.then(() => {}) : Promise<void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {} : () => void
 
 const p27 = p.then(() => {throw 1});
 >p27 : Promise<never>
 >p.then(() => {throw 1}) : Promise<never>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {throw 1} : () => never
 >1 : 1
 
 const p28 = p.then(() => Promise.resolve(1));
 >p28 : Promise<number>
 >p.then(() => Promise.resolve(1)) : Promise<number>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.resolve(1) : () => Promise<number>
 >Promise.resolve(1) : Promise<number>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
@@ -373,9 +373,9 @@ const p28 = p.then(() => Promise.resolve(1));
 const p29 = p.then(() => Promise.reject(1));
 >p29 : Promise<never>
 >p.then(() => Promise.reject(1)) : Promise<never>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.reject(1) : () => Promise<never>
 >Promise.reject(1) : Promise<never>
 >Promise.reject : <T = never>(reason?: any) => Promise<T>
@@ -386,27 +386,27 @@ const p29 = p.then(() => Promise.reject(1));
 const p30 = p.then(undefined, undefined);
 >p30 : Promise<boolean>
 >p.then(undefined, undefined) : Promise<boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >undefined : undefined
 >undefined : undefined
 
 const p31 = p.then(undefined, null);
 >p31 : Promise<boolean>
 >p.then(undefined, null) : Promise<boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >undefined : undefined
 >null : null
 
 const p32 = p.then(undefined, () => 1);
 >p32 : Promise<number | boolean>
 >p.then(undefined, () => 1) : Promise<number | boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >undefined : undefined
 >() => 1 : () => number
 >1 : 1
@@ -414,9 +414,9 @@ const p32 = p.then(undefined, () => 1);
 const p33 = p.then(undefined, () => x);
 >p33 : Promise<any>
 >p.then(undefined, () => x) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >undefined : undefined
 >() => x : () => any
 >x : any
@@ -424,9 +424,9 @@ const p33 = p.then(undefined, () => x);
 const p34 = p.then(undefined, () => undefined);
 >p34 : Promise<any>
 >p.then(undefined, () => undefined) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >undefined : undefined
 >() => undefined : () => any
 >undefined : undefined
@@ -434,9 +434,9 @@ const p34 = p.then(undefined, () => undefined);
 const p35 = p.then(undefined, () => null);
 >p35 : Promise<any>
 >p.then(undefined, () => null) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >undefined : undefined
 >() => null : () => any
 >null : null
@@ -444,18 +444,18 @@ const p35 = p.then(undefined, () => null);
 const p36 = p.then(undefined, () => {});
 >p36 : Promise<boolean | void>
 >p.then(undefined, () => {}) : Promise<boolean | void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >undefined : undefined
 >() => {} : () => void
 
 const p37 = p.then(undefined, () => {throw 1});
 >p37 : Promise<boolean>
 >p.then(undefined, () => {throw 1}) : Promise<boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >undefined : undefined
 >() => {throw 1} : () => never
 >1 : 1
@@ -463,9 +463,9 @@ const p37 = p.then(undefined, () => {throw 1});
 const p38 = p.then(undefined, () => Promise.resolve(1));
 >p38 : Promise<number | boolean>
 >p.then(undefined, () => Promise.resolve(1)) : Promise<number | boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >undefined : undefined
 >() => Promise.resolve(1) : () => Promise<number>
 >Promise.resolve(1) : Promise<number>
@@ -477,9 +477,9 @@ const p38 = p.then(undefined, () => Promise.resolve(1));
 const p39 = p.then(undefined, () => Promise.reject(1));
 >p39 : Promise<boolean>
 >p.then(undefined, () => Promise.reject(1)) : Promise<boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >undefined : undefined
 >() => Promise.reject(1) : () => Promise<never>
 >Promise.reject(1) : Promise<never>
@@ -491,27 +491,27 @@ const p39 = p.then(undefined, () => Promise.reject(1));
 const p40 = p.then(null, undefined);
 >p40 : Promise<boolean>
 >p.then(null, undefined) : Promise<boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >null : null
 >undefined : undefined
 
 const p41 = p.then(null, null);
 >p41 : Promise<boolean>
 >p.then(null, null) : Promise<boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >null : null
 >null : null
 
 const p42 = p.then(null, () => 1);
 >p42 : Promise<number | boolean>
 >p.then(null, () => 1) : Promise<number | boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >null : null
 >() => 1 : () => number
 >1 : 1
@@ -519,9 +519,9 @@ const p42 = p.then(null, () => 1);
 const p43 = p.then(null, () => x);
 >p43 : Promise<any>
 >p.then(null, () => x) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >null : null
 >() => x : () => any
 >x : any
@@ -529,9 +529,9 @@ const p43 = p.then(null, () => x);
 const p44 = p.then(null, () => undefined);
 >p44 : Promise<any>
 >p.then(null, () => undefined) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >null : null
 >() => undefined : () => any
 >undefined : undefined
@@ -539,9 +539,9 @@ const p44 = p.then(null, () => undefined);
 const p45 = p.then(null, () => null);
 >p45 : Promise<any>
 >p.then(null, () => null) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >null : null
 >() => null : () => any
 >null : null
@@ -549,18 +549,18 @@ const p45 = p.then(null, () => null);
 const p46 = p.then(null, () => {});
 >p46 : Promise<boolean | void>
 >p.then(null, () => {}) : Promise<boolean | void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >null : null
 >() => {} : () => void
 
 const p47 = p.then(null, () => {throw 1});
 >p47 : Promise<boolean>
 >p.then(null, () => {throw 1}) : Promise<boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >null : null
 >() => {throw 1} : () => never
 >1 : 1
@@ -568,9 +568,9 @@ const p47 = p.then(null, () => {throw 1});
 const p48 = p.then(null, () => Promise.resolve(1));
 >p48 : Promise<number | boolean>
 >p.then(null, () => Promise.resolve(1)) : Promise<number | boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >null : null
 >() => Promise.resolve(1) : () => Promise<number>
 >Promise.resolve(1) : Promise<number>
@@ -582,9 +582,9 @@ const p48 = p.then(null, () => Promise.resolve(1));
 const p49 = p.then(null, () => Promise.reject(1));
 >p49 : Promise<boolean>
 >p.then(null, () => Promise.reject(1)) : Promise<boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >null : null
 >() => Promise.reject(1) : () => Promise<never>
 >Promise.reject(1) : Promise<never>
@@ -596,9 +596,9 @@ const p49 = p.then(null, () => Promise.reject(1));
 const p50 = p.then(() => "1", undefined);
 >p50 : Promise<string>
 >p.then(() => "1", undefined) : Promise<string>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => "1" : () => string
 >"1" : "1"
 >undefined : undefined
@@ -606,9 +606,9 @@ const p50 = p.then(() => "1", undefined);
 const p51 = p.then(() => "1", null);
 >p51 : Promise<string>
 >p.then(() => "1", null) : Promise<string>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => "1" : () => string
 >"1" : "1"
 >null : null
@@ -616,9 +616,9 @@ const p51 = p.then(() => "1", null);
 const p52 = p.then(() => "1", () => 1);
 >p52 : Promise<string | number>
 >p.then(() => "1", () => 1) : Promise<string | number>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => "1" : () => string
 >"1" : "1"
 >() => 1 : () => number
@@ -627,9 +627,9 @@ const p52 = p.then(() => "1", () => 1);
 const p53 = p.then(() => "1", () => x);
 >p53 : Promise<any>
 >p.then(() => "1", () => x) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => "1" : () => string
 >"1" : "1"
 >() => x : () => any
@@ -638,9 +638,9 @@ const p53 = p.then(() => "1", () => x);
 const p54 = p.then(() => "1", () => undefined);
 >p54 : Promise<any>
 >p.then(() => "1", () => undefined) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => "1" : () => string
 >"1" : "1"
 >() => undefined : () => any
@@ -649,9 +649,9 @@ const p54 = p.then(() => "1", () => undefined);
 const p55 = p.then(() => "1", () => null);
 >p55 : Promise<any>
 >p.then(() => "1", () => null) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => "1" : () => string
 >"1" : "1"
 >() => null : () => any
@@ -660,9 +660,9 @@ const p55 = p.then(() => "1", () => null);
 const p56 = p.then(() => "1", () => {});
 >p56 : Promise<string | void>
 >p.then(() => "1", () => {}) : Promise<string | void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => "1" : () => string
 >"1" : "1"
 >() => {} : () => void
@@ -670,9 +670,9 @@ const p56 = p.then(() => "1", () => {});
 const p57 = p.then(() => "1", () => {throw 1});
 >p57 : Promise<string>
 >p.then(() => "1", () => {throw 1}) : Promise<string>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => "1" : () => string
 >"1" : "1"
 >() => {throw 1} : () => never
@@ -681,9 +681,9 @@ const p57 = p.then(() => "1", () => {throw 1});
 const p58 = p.then(() => "1", () => Promise.resolve(1));
 >p58 : Promise<string | number>
 >p.then(() => "1", () => Promise.resolve(1)) : Promise<string | number>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => "1" : () => string
 >"1" : "1"
 >() => Promise.resolve(1) : () => Promise<number>
@@ -696,9 +696,9 @@ const p58 = p.then(() => "1", () => Promise.resolve(1));
 const p59 = p.then(() => "1", () => Promise.reject(1));
 >p59 : Promise<string>
 >p.then(() => "1", () => Promise.reject(1)) : Promise<string>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => "1" : () => string
 >"1" : "1"
 >() => Promise.reject(1) : () => Promise<never>
@@ -711,9 +711,9 @@ const p59 = p.then(() => "1", () => Promise.reject(1));
 const p60 = p.then(() => x, undefined);
 >p60 : Promise<any>
 >p.then(() => x, undefined) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => x : () => any
 >x : any
 >undefined : undefined
@@ -721,9 +721,9 @@ const p60 = p.then(() => x, undefined);
 const p61 = p.then(() => x, null);
 >p61 : Promise<any>
 >p.then(() => x, null) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => x : () => any
 >x : any
 >null : null
@@ -731,9 +731,9 @@ const p61 = p.then(() => x, null);
 const p62 = p.then(() => x, () => 1);
 >p62 : Promise<any>
 >p.then(() => x, () => 1) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => x : () => any
 >x : any
 >() => 1 : () => number
@@ -742,9 +742,9 @@ const p62 = p.then(() => x, () => 1);
 const p63 = p.then(() => x, () => x);
 >p63 : Promise<any>
 >p.then(() => x, () => x) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => x : () => any
 >x : any
 >() => x : () => any
@@ -753,9 +753,9 @@ const p63 = p.then(() => x, () => x);
 const p64 = p.then(() => x, () => undefined);
 >p64 : Promise<any>
 >p.then(() => x, () => undefined) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => x : () => any
 >x : any
 >() => undefined : () => any
@@ -764,9 +764,9 @@ const p64 = p.then(() => x, () => undefined);
 const p65 = p.then(() => x, () => null);
 >p65 : Promise<any>
 >p.then(() => x, () => null) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => x : () => any
 >x : any
 >() => null : () => any
@@ -775,9 +775,9 @@ const p65 = p.then(() => x, () => null);
 const p66 = p.then(() => x, () => {});
 >p66 : Promise<any>
 >p.then(() => x, () => {}) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => x : () => any
 >x : any
 >() => {} : () => void
@@ -785,9 +785,9 @@ const p66 = p.then(() => x, () => {});
 const p67 = p.then(() => x, () => {throw 1});
 >p67 : Promise<any>
 >p.then(() => x, () => {throw 1}) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => x : () => any
 >x : any
 >() => {throw 1} : () => never
@@ -796,9 +796,9 @@ const p67 = p.then(() => x, () => {throw 1});
 const p68 = p.then(() => x, () => Promise.resolve(1));
 >p68 : Promise<any>
 >p.then(() => x, () => Promise.resolve(1)) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => x : () => any
 >x : any
 >() => Promise.resolve(1) : () => Promise<number>
@@ -811,9 +811,9 @@ const p68 = p.then(() => x, () => Promise.resolve(1));
 const p69 = p.then(() => x, () => Promise.reject(1));
 >p69 : Promise<any>
 >p.then(() => x, () => Promise.reject(1)) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => x : () => any
 >x : any
 >() => Promise.reject(1) : () => Promise<never>
@@ -826,9 +826,9 @@ const p69 = p.then(() => x, () => Promise.reject(1));
 const p70 = p.then(() => undefined, undefined);
 >p70 : Promise<any>
 >p.then(() => undefined, undefined) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => undefined : () => any
 >undefined : undefined
 >undefined : undefined
@@ -836,9 +836,9 @@ const p70 = p.then(() => undefined, undefined);
 const p71 = p.then(() => undefined, null);
 >p71 : Promise<any>
 >p.then(() => undefined, null) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => undefined : () => any
 >undefined : undefined
 >null : null
@@ -846,9 +846,9 @@ const p71 = p.then(() => undefined, null);
 const p72 = p.then(() => undefined, () => 1);
 >p72 : Promise<any>
 >p.then(() => undefined, () => 1) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => undefined : () => any
 >undefined : undefined
 >() => 1 : () => number
@@ -857,9 +857,9 @@ const p72 = p.then(() => undefined, () => 1);
 const p73 = p.then(() => undefined, () => x);
 >p73 : Promise<any>
 >p.then(() => undefined, () => x) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => undefined : () => any
 >undefined : undefined
 >() => x : () => any
@@ -868,9 +868,9 @@ const p73 = p.then(() => undefined, () => x);
 const p74 = p.then(() => undefined, () => undefined);
 >p74 : Promise<any>
 >p.then(() => undefined, () => undefined) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => undefined : () => any
 >undefined : undefined
 >() => undefined : () => any
@@ -879,9 +879,9 @@ const p74 = p.then(() => undefined, () => undefined);
 const p75 = p.then(() => undefined, () => null);
 >p75 : Promise<any>
 >p.then(() => undefined, () => null) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => undefined : () => any
 >undefined : undefined
 >() => null : () => any
@@ -890,9 +890,9 @@ const p75 = p.then(() => undefined, () => null);
 const p76 = p.then(() => undefined, () => {});
 >p76 : Promise<any>
 >p.then(() => undefined, () => {}) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => undefined : () => any
 >undefined : undefined
 >() => {} : () => void
@@ -900,9 +900,9 @@ const p76 = p.then(() => undefined, () => {});
 const p77 = p.then(() => undefined, () => {throw 1});
 >p77 : Promise<any>
 >p.then(() => undefined, () => {throw 1}) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => undefined : () => any
 >undefined : undefined
 >() => {throw 1} : () => never
@@ -911,9 +911,9 @@ const p77 = p.then(() => undefined, () => {throw 1});
 const p78 = p.then(() => undefined, () => Promise.resolve(1));
 >p78 : Promise<any>
 >p.then(() => undefined, () => Promise.resolve(1)) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => undefined : () => any
 >undefined : undefined
 >() => Promise.resolve(1) : () => Promise<number>
@@ -926,9 +926,9 @@ const p78 = p.then(() => undefined, () => Promise.resolve(1));
 const p79 = p.then(() => undefined, () => Promise.reject(1));
 >p79 : Promise<any>
 >p.then(() => undefined, () => Promise.reject(1)) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => undefined : () => any
 >undefined : undefined
 >() => Promise.reject(1) : () => Promise<never>
@@ -941,9 +941,9 @@ const p79 = p.then(() => undefined, () => Promise.reject(1));
 const p80 = p.then(() => null, undefined);
 >p80 : Promise<any>
 >p.then(() => null, undefined) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => null : () => any
 >null : null
 >undefined : undefined
@@ -951,9 +951,9 @@ const p80 = p.then(() => null, undefined);
 const p81 = p.then(() => null, null);
 >p81 : Promise<any>
 >p.then(() => null, null) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => null : () => any
 >null : null
 >null : null
@@ -961,9 +961,9 @@ const p81 = p.then(() => null, null);
 const p82 = p.then(() => null, () => 1);
 >p82 : Promise<any>
 >p.then(() => null, () => 1) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => null : () => any
 >null : null
 >() => 1 : () => number
@@ -972,9 +972,9 @@ const p82 = p.then(() => null, () => 1);
 const p83 = p.then(() => null, () => x);
 >p83 : Promise<any>
 >p.then(() => null, () => x) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => null : () => any
 >null : null
 >() => x : () => any
@@ -983,9 +983,9 @@ const p83 = p.then(() => null, () => x);
 const p84 = p.then(() => null, () => undefined);
 >p84 : Promise<any>
 >p.then(() => null, () => undefined) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => null : () => any
 >null : null
 >() => undefined : () => any
@@ -994,9 +994,9 @@ const p84 = p.then(() => null, () => undefined);
 const p85 = p.then(() => null, () => null);
 >p85 : Promise<any>
 >p.then(() => null, () => null) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => null : () => any
 >null : null
 >() => null : () => any
@@ -1005,9 +1005,9 @@ const p85 = p.then(() => null, () => null);
 const p86 = p.then(() => null, () => {});
 >p86 : Promise<any>
 >p.then(() => null, () => {}) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => null : () => any
 >null : null
 >() => {} : () => void
@@ -1015,9 +1015,9 @@ const p86 = p.then(() => null, () => {});
 const p87 = p.then(() => null, () => {throw 1});
 >p87 : Promise<any>
 >p.then(() => null, () => {throw 1}) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => null : () => any
 >null : null
 >() => {throw 1} : () => never
@@ -1026,9 +1026,9 @@ const p87 = p.then(() => null, () => {throw 1});
 const p88 = p.then(() => null, () => Promise.resolve(1));
 >p88 : Promise<any>
 >p.then(() => null, () => Promise.resolve(1)) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => null : () => any
 >null : null
 >() => Promise.resolve(1) : () => Promise<number>
@@ -1041,9 +1041,9 @@ const p88 = p.then(() => null, () => Promise.resolve(1));
 const p89 = p.then(() => null, () => Promise.reject(1));
 >p89 : Promise<any>
 >p.then(() => null, () => Promise.reject(1)) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => null : () => any
 >null : null
 >() => Promise.reject(1) : () => Promise<never>
@@ -1056,27 +1056,27 @@ const p89 = p.then(() => null, () => Promise.reject(1));
 const p90 = p.then(() => {}, undefined);
 >p90 : Promise<void>
 >p.then(() => {}, undefined) : Promise<void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {} : () => void
 >undefined : undefined
 
 const p91 = p.then(() => {}, null);
 >p91 : Promise<void>
 >p.then(() => {}, null) : Promise<void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {} : () => void
 >null : null
 
 const p92 = p.then(() => {}, () => 1);
 >p92 : Promise<number | void>
 >p.then(() => {}, () => 1) : Promise<number | void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {} : () => void
 >() => 1 : () => number
 >1 : 1
@@ -1084,9 +1084,9 @@ const p92 = p.then(() => {}, () => 1);
 const p93 = p.then(() => {}, () => x);
 >p93 : Promise<any>
 >p.then(() => {}, () => x) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {} : () => void
 >() => x : () => any
 >x : any
@@ -1094,9 +1094,9 @@ const p93 = p.then(() => {}, () => x);
 const p94 = p.then(() => {}, () => undefined);
 >p94 : Promise<any>
 >p.then(() => {}, () => undefined) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {} : () => void
 >() => undefined : () => any
 >undefined : undefined
@@ -1104,9 +1104,9 @@ const p94 = p.then(() => {}, () => undefined);
 const p95 = p.then(() => {}, () => null);
 >p95 : Promise<any>
 >p.then(() => {}, () => null) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {} : () => void
 >() => null : () => any
 >null : null
@@ -1114,18 +1114,18 @@ const p95 = p.then(() => {}, () => null);
 const p96 = p.then(() => {}, () => {});
 >p96 : Promise<void>
 >p.then(() => {}, () => {}) : Promise<void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {} : () => void
 >() => {} : () => void
 
 const p97 = p.then(() => {}, () => {throw 1});
 >p97 : Promise<void>
 >p.then(() => {}, () => {throw 1}) : Promise<void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {} : () => void
 >() => {throw 1} : () => never
 >1 : 1
@@ -1133,9 +1133,9 @@ const p97 = p.then(() => {}, () => {throw 1});
 const p98 = p.then(() => {}, () => Promise.resolve(1));
 >p98 : Promise<number | void>
 >p.then(() => {}, () => Promise.resolve(1)) : Promise<number | void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {} : () => void
 >() => Promise.resolve(1) : () => Promise<number>
 >Promise.resolve(1) : Promise<number>
@@ -1147,9 +1147,9 @@ const p98 = p.then(() => {}, () => Promise.resolve(1));
 const p99 = p.then(() => {}, () => Promise.reject(1));
 >p99 : Promise<void>
 >p.then(() => {}, () => Promise.reject(1)) : Promise<void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {} : () => void
 >() => Promise.reject(1) : () => Promise<never>
 >Promise.reject(1) : Promise<never>
@@ -1161,9 +1161,9 @@ const p99 = p.then(() => {}, () => Promise.reject(1));
 const pa0 = p.then(() => {throw 1}, undefined);
 >pa0 : Promise<never>
 >p.then(() => {throw 1}, undefined) : Promise<never>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {throw 1} : () => never
 >1 : 1
 >undefined : undefined
@@ -1171,9 +1171,9 @@ const pa0 = p.then(() => {throw 1}, undefined);
 const pa1 = p.then(() => {throw 1}, null);
 >pa1 : Promise<never>
 >p.then(() => {throw 1}, null) : Promise<never>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {throw 1} : () => never
 >1 : 1
 >null : null
@@ -1181,9 +1181,9 @@ const pa1 = p.then(() => {throw 1}, null);
 const pa2 = p.then(() => {throw 1}, () => 1);
 >pa2 : Promise<number>
 >p.then(() => {throw 1}, () => 1) : Promise<number>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {throw 1} : () => never
 >1 : 1
 >() => 1 : () => number
@@ -1192,9 +1192,9 @@ const pa2 = p.then(() => {throw 1}, () => 1);
 const pa3 = p.then(() => {throw 1}, () => x);
 >pa3 : Promise<any>
 >p.then(() => {throw 1}, () => x) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {throw 1} : () => never
 >1 : 1
 >() => x : () => any
@@ -1203,9 +1203,9 @@ const pa3 = p.then(() => {throw 1}, () => x);
 const pa4 = p.then(() => {throw 1}, () => undefined);
 >pa4 : Promise<any>
 >p.then(() => {throw 1}, () => undefined) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {throw 1} : () => never
 >1 : 1
 >() => undefined : () => any
@@ -1214,9 +1214,9 @@ const pa4 = p.then(() => {throw 1}, () => undefined);
 const pa5 = p.then(() => {throw 1}, () => null);
 >pa5 : Promise<any>
 >p.then(() => {throw 1}, () => null) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {throw 1} : () => never
 >1 : 1
 >() => null : () => any
@@ -1225,9 +1225,9 @@ const pa5 = p.then(() => {throw 1}, () => null);
 const pa6 = p.then(() => {throw 1}, () => {});
 >pa6 : Promise<void>
 >p.then(() => {throw 1}, () => {}) : Promise<void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {throw 1} : () => never
 >1 : 1
 >() => {} : () => void
@@ -1235,9 +1235,9 @@ const pa6 = p.then(() => {throw 1}, () => {});
 const pa7 = p.then(() => {throw 1}, () => {throw 1});
 >pa7 : Promise<never>
 >p.then(() => {throw 1}, () => {throw 1}) : Promise<never>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {throw 1} : () => never
 >1 : 1
 >() => {throw 1} : () => never
@@ -1246,9 +1246,9 @@ const pa7 = p.then(() => {throw 1}, () => {throw 1});
 const pa8 = p.then(() => {throw 1}, () => Promise.resolve(1));
 >pa8 : Promise<number>
 >p.then(() => {throw 1}, () => Promise.resolve(1)) : Promise<number>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {throw 1} : () => never
 >1 : 1
 >() => Promise.resolve(1) : () => Promise<number>
@@ -1261,9 +1261,9 @@ const pa8 = p.then(() => {throw 1}, () => Promise.resolve(1));
 const pa9 = p.then(() => {throw 1}, () => Promise.reject(1));
 >pa9 : Promise<never>
 >p.then(() => {throw 1}, () => Promise.reject(1)) : Promise<never>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {throw 1} : () => never
 >1 : 1
 >() => Promise.reject(1) : () => Promise<never>
@@ -1276,9 +1276,9 @@ const pa9 = p.then(() => {throw 1}, () => Promise.reject(1));
 const pb0 = p.then(() => Promise.resolve("1"), undefined);
 >pb0 : Promise<string>
 >p.then(() => Promise.resolve("1"), undefined) : Promise<string>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.resolve("1") : () => Promise<string>
 >Promise.resolve("1") : Promise<string>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
@@ -1290,9 +1290,9 @@ const pb0 = p.then(() => Promise.resolve("1"), undefined);
 const pb1 = p.then(() => Promise.resolve("1"), null);
 >pb1 : Promise<string>
 >p.then(() => Promise.resolve("1"), null) : Promise<string>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.resolve("1") : () => Promise<string>
 >Promise.resolve("1") : Promise<string>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
@@ -1304,9 +1304,9 @@ const pb1 = p.then(() => Promise.resolve("1"), null);
 const pb2 = p.then(() => Promise.resolve("1"), () => 1);
 >pb2 : Promise<string | number>
 >p.then(() => Promise.resolve("1"), () => 1) : Promise<string | number>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.resolve("1") : () => Promise<string>
 >Promise.resolve("1") : Promise<string>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
@@ -1319,9 +1319,9 @@ const pb2 = p.then(() => Promise.resolve("1"), () => 1);
 const pb3 = p.then(() => Promise.resolve("1"), () => x);
 >pb3 : Promise<any>
 >p.then(() => Promise.resolve("1"), () => x) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.resolve("1") : () => Promise<string>
 >Promise.resolve("1") : Promise<string>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
@@ -1334,9 +1334,9 @@ const pb3 = p.then(() => Promise.resolve("1"), () => x);
 const pb4 = p.then(() => Promise.resolve("1"), () => undefined);
 >pb4 : Promise<any>
 >p.then(() => Promise.resolve("1"), () => undefined) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.resolve("1") : () => Promise<string>
 >Promise.resolve("1") : Promise<string>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
@@ -1349,9 +1349,9 @@ const pb4 = p.then(() => Promise.resolve("1"), () => undefined);
 const pb5 = p.then(() => Promise.resolve("1"), () => null);
 >pb5 : Promise<any>
 >p.then(() => Promise.resolve("1"), () => null) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.resolve("1") : () => Promise<string>
 >Promise.resolve("1") : Promise<string>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
@@ -1364,9 +1364,9 @@ const pb5 = p.then(() => Promise.resolve("1"), () => null);
 const pb6 = p.then(() => Promise.resolve("1"), () => {});
 >pb6 : Promise<string | void>
 >p.then(() => Promise.resolve("1"), () => {}) : Promise<string | void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.resolve("1") : () => Promise<string>
 >Promise.resolve("1") : Promise<string>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
@@ -1378,9 +1378,9 @@ const pb6 = p.then(() => Promise.resolve("1"), () => {});
 const pb7 = p.then(() => Promise.resolve("1"), () => {throw 1});
 >pb7 : Promise<string>
 >p.then(() => Promise.resolve("1"), () => {throw 1}) : Promise<string>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.resolve("1") : () => Promise<string>
 >Promise.resolve("1") : Promise<string>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
@@ -1393,9 +1393,9 @@ const pb7 = p.then(() => Promise.resolve("1"), () => {throw 1});
 const pb8 = p.then(() => Promise.resolve("1"), () => Promise.resolve(1));
 >pb8 : Promise<string | number>
 >p.then(() => Promise.resolve("1"), () => Promise.resolve(1)) : Promise<string | number>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.resolve("1") : () => Promise<string>
 >Promise.resolve("1") : Promise<string>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
@@ -1412,9 +1412,9 @@ const pb8 = p.then(() => Promise.resolve("1"), () => Promise.resolve(1));
 const pb9 = p.then(() => Promise.resolve("1"), () => Promise.reject(1));
 >pb9 : Promise<string>
 >p.then(() => Promise.resolve("1"), () => Promise.reject(1)) : Promise<string>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.resolve("1") : () => Promise<string>
 >Promise.resolve("1") : Promise<string>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
@@ -1431,9 +1431,9 @@ const pb9 = p.then(() => Promise.resolve("1"), () => Promise.reject(1));
 const pc0 = p.then(() => Promise.reject("1"), undefined);
 >pc0 : Promise<never>
 >p.then(() => Promise.reject("1"), undefined) : Promise<never>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.reject("1") : () => Promise<never>
 >Promise.reject("1") : Promise<never>
 >Promise.reject : <T = never>(reason?: any) => Promise<T>
@@ -1445,9 +1445,9 @@ const pc0 = p.then(() => Promise.reject("1"), undefined);
 const pc1 = p.then(() => Promise.reject("1"), null);
 >pc1 : Promise<never>
 >p.then(() => Promise.reject("1"), null) : Promise<never>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.reject("1") : () => Promise<never>
 >Promise.reject("1") : Promise<never>
 >Promise.reject : <T = never>(reason?: any) => Promise<T>
@@ -1459,9 +1459,9 @@ const pc1 = p.then(() => Promise.reject("1"), null);
 const pc2 = p.then(() => Promise.reject("1"), () => 1);
 >pc2 : Promise<number>
 >p.then(() => Promise.reject("1"), () => 1) : Promise<number>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.reject("1") : () => Promise<never>
 >Promise.reject("1") : Promise<never>
 >Promise.reject : <T = never>(reason?: any) => Promise<T>
@@ -1474,9 +1474,9 @@ const pc2 = p.then(() => Promise.reject("1"), () => 1);
 const pc3 = p.then(() => Promise.reject("1"), () => x);
 >pc3 : Promise<any>
 >p.then(() => Promise.reject("1"), () => x) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.reject("1") : () => Promise<never>
 >Promise.reject("1") : Promise<never>
 >Promise.reject : <T = never>(reason?: any) => Promise<T>
@@ -1489,9 +1489,9 @@ const pc3 = p.then(() => Promise.reject("1"), () => x);
 const pc4 = p.then(() => Promise.reject("1"), () => undefined);
 >pc4 : Promise<any>
 >p.then(() => Promise.reject("1"), () => undefined) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.reject("1") : () => Promise<never>
 >Promise.reject("1") : Promise<never>
 >Promise.reject : <T = never>(reason?: any) => Promise<T>
@@ -1504,9 +1504,9 @@ const pc4 = p.then(() => Promise.reject("1"), () => undefined);
 const pc5 = p.then(() => Promise.reject("1"), () => null);
 >pc5 : Promise<any>
 >p.then(() => Promise.reject("1"), () => null) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.reject("1") : () => Promise<never>
 >Promise.reject("1") : Promise<never>
 >Promise.reject : <T = never>(reason?: any) => Promise<T>
@@ -1519,9 +1519,9 @@ const pc5 = p.then(() => Promise.reject("1"), () => null);
 const pc6 = p.then(() => Promise.reject("1"), () => {});
 >pc6 : Promise<void>
 >p.then(() => Promise.reject("1"), () => {}) : Promise<void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.reject("1") : () => Promise<never>
 >Promise.reject("1") : Promise<never>
 >Promise.reject : <T = never>(reason?: any) => Promise<T>
@@ -1533,9 +1533,9 @@ const pc6 = p.then(() => Promise.reject("1"), () => {});
 const pc7 = p.then(() => Promise.reject("1"), () => {throw 1});
 >pc7 : Promise<never>
 >p.then(() => Promise.reject("1"), () => {throw 1}) : Promise<never>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.reject("1") : () => Promise<never>
 >Promise.reject("1") : Promise<never>
 >Promise.reject : <T = never>(reason?: any) => Promise<T>
@@ -1548,9 +1548,9 @@ const pc7 = p.then(() => Promise.reject("1"), () => {throw 1});
 const pc8 = p.then(() => Promise.reject("1"), () => Promise.resolve(1));
 >pc8 : Promise<number>
 >p.then(() => Promise.reject("1"), () => Promise.resolve(1)) : Promise<number>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.reject("1") : () => Promise<never>
 >Promise.reject("1") : Promise<never>
 >Promise.reject : <T = never>(reason?: any) => Promise<T>
@@ -1567,9 +1567,9 @@ const pc8 = p.then(() => Promise.reject("1"), () => Promise.resolve(1));
 const pc9 = p.then(() => Promise.reject("1"), () => Promise.reject(1));
 >pc9 : Promise<never>
 >p.then(() => Promise.reject("1"), () => Promise.reject(1)) : Promise<never>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: (value: boolean) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.reject("1") : () => Promise<never>
 >Promise.reject("1") : Promise<never>
 >Promise.reject : <T = never>(reason?: any) => Promise<T>
diff --git a/tests/baselines/reference/promiseTypeInference.errors.txt b/tests/baselines/reference/promiseTypeInference.errors.txt
deleted file mode 100644
index 04ba3a0d878f8..0000000000000
--- a/tests/baselines/reference/promiseTypeInference.errors.txt
+++ /dev/null
@@ -1,40 +0,0 @@
-tests/cases/compiler/promiseTypeInference.ts(10,39): error TS2769: No overload matches this call.
-  Overload 1 of 2, '(success?: (value: string) => Promise<unknown>): Promise<unknown>', gave the following error.
-    Property 'catch' is missing in type 'IPromise<number>' but required in type 'Promise<unknown>'.
-  Overload 2 of 2, '(onfulfilled?: (value: string) => number | PromiseLike<number>, onrejected?: (reason: any) => PromiseLike<never>): Promise<number>', gave the following error.
-    Type 'IPromise<number>' is not assignable to type 'number | PromiseLike<number>'.
-      Type 'IPromise<number>' is not assignable to type 'PromiseLike<number>'.
-        Types of property 'then' are incompatible.
-          Type '<U>(success?: (value: number) => IPromise<U>) => IPromise<U>' is not assignable to type '<TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => PromiseLike<TResult1 | TResult2>'.
-            Types of parameters 'success' and 'onfulfilled' are incompatible.
-              Type 'TResult1 | PromiseLike<TResult1>' is not assignable to type 'IPromise<TResult1 | TResult2>'.
-                Type 'TResult1' is not assignable to type 'IPromise<TResult1 | TResult2>'.
-
-
-==== tests/cases/compiler/promiseTypeInference.ts (1 errors) ====
-    declare class Promise<T> {
-        then<U>(success?: (value: T) => Promise<U>): Promise<U>;
-    }
-    interface IPromise<T> {
-        then<U>(success?: (value: T) => IPromise<U>): IPromise<U>;
-    }
-    declare function load(name: string): Promise<string>;
-    declare function convert(s: string): IPromise<number>;
-    
-    var $$x = load("something").then(s => convert(s));
-                                          ~~~~~~~~~~
-!!! error TS2769: No overload matches this call.
-!!! error TS2769:   Overload 1 of 2, '(success?: (value: string) => Promise<unknown>): Promise<unknown>', gave the following error.
-!!! error TS2769:     Property 'catch' is missing in type 'IPromise<number>' but required in type 'Promise<unknown>'.
-!!! error TS2769:   Overload 2 of 2, '(onfulfilled?: (value: string) => number | PromiseLike<number>, onrejected?: (reason: any) => PromiseLike<never>): Promise<number>', gave the following error.
-!!! error TS2769:     Type 'IPromise<number>' is not assignable to type 'number | PromiseLike<number>'.
-!!! error TS2769:       Type 'IPromise<number>' is not assignable to type 'PromiseLike<number>'.
-!!! error TS2769:         Types of property 'then' are incompatible.
-!!! error TS2769:           Type '<U>(success?: (value: number) => IPromise<U>) => IPromise<U>' is not assignable to type '<TResult1 = number, TResult2 = never>(onfulfilled?: (value: number) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => PromiseLike<TResult1 | TResult2>'.
-!!! error TS2769:             Types of parameters 'success' and 'onfulfilled' are incompatible.
-!!! error TS2769:               Type 'TResult1 | PromiseLike<TResult1>' is not assignable to type 'IPromise<TResult1 | TResult2>'.
-!!! error TS2769:                 Type 'TResult1' is not assignable to type 'IPromise<TResult1 | TResult2>'.
-!!! related TS2728 /.ts/lib.es5.d.ts:1413:5: 'catch' is declared here.
-!!! related TS6502 tests/cases/compiler/promiseTypeInference.ts:2:23: The expected type comes from the return type of this signature.
-!!! related TS6502 /.ts/lib.es5.d.ts:1406:57: The expected type comes from the return type of this signature.
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/promiseTypeInference.types b/tests/baselines/reference/promiseTypeInference.types
index 36b3bdadd28ce..48d0ea3aa1091 100644
--- a/tests/baselines/reference/promiseTypeInference.types
+++ b/tests/baselines/reference/promiseTypeInference.types
@@ -3,7 +3,7 @@ declare class Promise<T> {
 >Promise : Promise<T>
 
     then<U>(success?: (value: T) => Promise<U>): Promise<U>;
->then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: T) => Promise<U>): Promise<U>; }
+>then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: T) => Promise<U>): Promise<U>; }
 >success : (value: T) => Promise<U>
 >value : T
 }
@@ -22,13 +22,13 @@ declare function convert(s: string): IPromise<number>;
 >s : string
 
 var $$x = load("something").then(s => convert(s));
->$$x : any
->load("something").then(s => convert(s)) : any
->load("something").then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>): Promise<U>; }
+>$$x : Promise<IPromise<number>>
+>load("something").then(s => convert(s)) : Promise<IPromise<number>>
+>load("something").then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>): Promise<U>; }
 >load("something") : Promise<string>
 >load : (name: string) => Promise<string>
 >"something" : "something"
->then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: string) => Promise<U>): Promise<U>; }
+>then : { <TResult1 = string, TResult2 = never>(onfulfilled?: (value: string) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: string) => Promise<U>): Promise<U>; }
 >s => convert(s) : (s: string) => IPromise<number>
 >s : string
 >convert(s) : IPromise<number>
diff --git a/tests/baselines/reference/promiseTypeStrictNull.types b/tests/baselines/reference/promiseTypeStrictNull.types
index 73d2f70346135..8c65f43108e20 100644
--- a/tests/baselines/reference/promiseTypeStrictNull.types
+++ b/tests/baselines/reference/promiseTypeStrictNull.types
@@ -182,92 +182,92 @@ async function I() {
 const p00 = p.catch();
 >p00 : Promise<boolean>
 >p.catch() : Promise<boolean>
->p.catch : <TResult = never>(onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | null | undefined) => Promise<boolean | TResult>
+>p.catch : <TResult = never>(onrejected?: ((reason: any) => TResult) | null | undefined) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >p : Promise<boolean>
->catch : <TResult = never>(onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | null | undefined) => Promise<boolean | TResult>
+>catch : <TResult = never>(onrejected?: ((reason: any) => TResult) | null | undefined) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 
 const p01 = p.then();
 >p01 : Promise<boolean>
 >p.then() : Promise<boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 
 const p10 = p.catch(undefined);
 >p10 : Promise<boolean>
 >p.catch(undefined) : Promise<boolean>
->p.catch : <TResult = never>(onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | null | undefined) => Promise<boolean | TResult>
+>p.catch : <TResult = never>(onrejected?: ((reason: any) => TResult) | null | undefined) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >p : Promise<boolean>
->catch : <TResult = never>(onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | null | undefined) => Promise<boolean | TResult>
+>catch : <TResult = never>(onrejected?: ((reason: any) => TResult) | null | undefined) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >undefined : undefined
 
 const p11 = p.catch(null);
 >p11 : Promise<boolean>
 >p.catch(null) : Promise<boolean>
->p.catch : <TResult = never>(onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | null | undefined) => Promise<boolean | TResult>
+>p.catch : <TResult = never>(onrejected?: ((reason: any) => TResult) | null | undefined) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >p : Promise<boolean>
->catch : <TResult = never>(onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | null | undefined) => Promise<boolean | TResult>
+>catch : <TResult = never>(onrejected?: ((reason: any) => TResult) | null | undefined) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >null : null
 
 const p12 = p.catch(() => 1);
 >p12 : Promise<number | boolean>
 >p.catch(() => 1) : Promise<number | boolean>
->p.catch : <TResult = never>(onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | null | undefined) => Promise<boolean | TResult>
+>p.catch : <TResult = never>(onrejected?: ((reason: any) => TResult) | null | undefined) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >p : Promise<boolean>
->catch : <TResult = never>(onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | null | undefined) => Promise<boolean | TResult>
+>catch : <TResult = never>(onrejected?: ((reason: any) => TResult) | null | undefined) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >() => 1 : () => number
 >1 : 1
 
 const p13 = p.catch(() => x);
 >p13 : Promise<any>
 >p.catch(() => x) : Promise<any>
->p.catch : <TResult = never>(onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | null | undefined) => Promise<boolean | TResult>
+>p.catch : <TResult = never>(onrejected?: ((reason: any) => TResult) | null | undefined) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >p : Promise<boolean>
->catch : <TResult = never>(onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | null | undefined) => Promise<boolean | TResult>
+>catch : <TResult = never>(onrejected?: ((reason: any) => TResult) | null | undefined) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >() => x : () => any
 >x : any
 
 const p14 = p.catch(() => undefined);
 >p14 : Promise<boolean | undefined>
 >p.catch(() => undefined) : Promise<boolean | undefined>
->p.catch : <TResult = never>(onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | null | undefined) => Promise<boolean | TResult>
+>p.catch : <TResult = never>(onrejected?: ((reason: any) => TResult) | null | undefined) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >p : Promise<boolean>
->catch : <TResult = never>(onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | null | undefined) => Promise<boolean | TResult>
+>catch : <TResult = never>(onrejected?: ((reason: any) => TResult) | null | undefined) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >() => undefined : () => undefined
 >undefined : undefined
 
 const p15 = p.catch(() => null);
 >p15 : Promise<boolean | null>
 >p.catch(() => null) : Promise<boolean | null>
->p.catch : <TResult = never>(onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | null | undefined) => Promise<boolean | TResult>
+>p.catch : <TResult = never>(onrejected?: ((reason: any) => TResult) | null | undefined) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >p : Promise<boolean>
->catch : <TResult = never>(onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | null | undefined) => Promise<boolean | TResult>
+>catch : <TResult = never>(onrejected?: ((reason: any) => TResult) | null | undefined) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >() => null : () => null
 >null : null
 
 const p16 = p.catch(() => {});
 >p16 : Promise<boolean | void>
 >p.catch(() => {}) : Promise<boolean | void>
->p.catch : <TResult = never>(onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | null | undefined) => Promise<boolean | TResult>
+>p.catch : <TResult = never>(onrejected?: ((reason: any) => TResult) | null | undefined) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >p : Promise<boolean>
->catch : <TResult = never>(onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | null | undefined) => Promise<boolean | TResult>
+>catch : <TResult = never>(onrejected?: ((reason: any) => TResult) | null | undefined) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >() => {} : () => void
 
 const p17 = p.catch(() => {throw 1});
 >p17 : Promise<boolean>
 >p.catch(() => {throw 1}) : Promise<boolean>
->p.catch : <TResult = never>(onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | null | undefined) => Promise<boolean | TResult>
+>p.catch : <TResult = never>(onrejected?: ((reason: any) => TResult) | null | undefined) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >p : Promise<boolean>
->catch : <TResult = never>(onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | null | undefined) => Promise<boolean | TResult>
+>catch : <TResult = never>(onrejected?: ((reason: any) => TResult) | null | undefined) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >() => {throw 1} : () => never
 >1 : 1
 
 const p18 = p.catch(() => Promise.reject(1));
 >p18 : Promise<boolean>
 >p.catch(() => Promise.reject(1)) : Promise<boolean>
->p.catch : <TResult = never>(onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | null | undefined) => Promise<boolean | TResult>
+>p.catch : <TResult = never>(onrejected?: ((reason: any) => TResult) | null | undefined) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >p : Promise<boolean>
->catch : <TResult = never>(onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | null | undefined) => Promise<boolean | TResult>
+>catch : <TResult = never>(onrejected?: ((reason: any) => TResult) | null | undefined) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >() => Promise.reject(1) : () => Promise<never>
 >Promise.reject(1) : Promise<never>
 >Promise.reject : <T = never>(reason?: any) => Promise<T>
@@ -278,9 +278,9 @@ const p18 = p.catch(() => Promise.reject(1));
 const p19 = p.catch(() => Promise.resolve(1));
 >p19 : Promise<number | boolean>
 >p.catch(() => Promise.resolve(1)) : Promise<number | boolean>
->p.catch : <TResult = never>(onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | null | undefined) => Promise<boolean | TResult>
+>p.catch : <TResult = never>(onrejected?: ((reason: any) => TResult) | null | undefined) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >p : Promise<boolean>
->catch : <TResult = never>(onrejected?: ((reason: any) => TResult | PromiseLike<TResult>) | null | undefined) => Promise<boolean | TResult>
+>catch : <TResult = never>(onrejected?: ((reason: any) => TResult) | null | undefined) => Promise<boolean | (TResult extends PromiseLike<infer UResult> ? UResult : TResult)>
 >() => Promise.resolve(1) : () => Promise<number>
 >Promise.resolve(1) : Promise<number>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
@@ -291,78 +291,78 @@ const p19 = p.catch(() => Promise.resolve(1));
 const p20 = p.then(undefined);
 >p20 : Promise<boolean>
 >p.then(undefined) : Promise<boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >undefined : undefined
 
 const p21 = p.then(null);
 >p21 : Promise<boolean>
 >p.then(null) : Promise<boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >null : null
 
 const p22 = p.then(() => 1);
 >p22 : Promise<number>
 >p.then(() => 1) : Promise<number>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => 1 : () => number
 >1 : 1
 
 const p23 = p.then(() => x);
 >p23 : Promise<any>
 >p.then(() => x) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => x : () => any
 >x : any
 
 const p24 = p.then(() => undefined);
 >p24 : Promise<undefined>
 >p.then(() => undefined) : Promise<undefined>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => undefined : () => undefined
 >undefined : undefined
 
 const p25 = p.then(() => null);
 >p25 : Promise<null>
 >p.then(() => null) : Promise<null>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => null : () => null
 >null : null
 
 const p26 = p.then(() => {});
 >p26 : Promise<void>
 >p.then(() => {}) : Promise<void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {} : () => void
 
 const p27 = p.then(() => {throw 1});
 >p27 : Promise<never>
 >p.then(() => {throw 1}) : Promise<never>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {throw 1} : () => never
 >1 : 1
 
 const p28 = p.then(() => Promise.resolve(1));
 >p28 : Promise<number>
 >p.then(() => Promise.resolve(1)) : Promise<number>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.resolve(1) : () => Promise<number>
 >Promise.resolve(1) : Promise<number>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
@@ -373,9 +373,9 @@ const p28 = p.then(() => Promise.resolve(1));
 const p29 = p.then(() => Promise.reject(1));
 >p29 : Promise<never>
 >p.then(() => Promise.reject(1)) : Promise<never>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.reject(1) : () => Promise<never>
 >Promise.reject(1) : Promise<never>
 >Promise.reject : <T = never>(reason?: any) => Promise<T>
@@ -386,27 +386,27 @@ const p29 = p.then(() => Promise.reject(1));
 const p30 = p.then(undefined, undefined);
 >p30 : Promise<boolean>
 >p.then(undefined, undefined) : Promise<boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >undefined : undefined
 >undefined : undefined
 
 const p31 = p.then(undefined, null);
 >p31 : Promise<boolean>
 >p.then(undefined, null) : Promise<boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >undefined : undefined
 >null : null
 
 const p32 = p.then(undefined, () => 1);
 >p32 : Promise<number | boolean>
 >p.then(undefined, () => 1) : Promise<number | boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >undefined : undefined
 >() => 1 : () => number
 >1 : 1
@@ -414,9 +414,9 @@ const p32 = p.then(undefined, () => 1);
 const p33 = p.then(undefined, () => x);
 >p33 : Promise<any>
 >p.then(undefined, () => x) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >undefined : undefined
 >() => x : () => any
 >x : any
@@ -424,9 +424,9 @@ const p33 = p.then(undefined, () => x);
 const p34 = p.then(undefined, () => undefined);
 >p34 : Promise<boolean | undefined>
 >p.then(undefined, () => undefined) : Promise<boolean | undefined>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >undefined : undefined
 >() => undefined : () => undefined
 >undefined : undefined
@@ -434,9 +434,9 @@ const p34 = p.then(undefined, () => undefined);
 const p35 = p.then(undefined, () => null);
 >p35 : Promise<boolean | null>
 >p.then(undefined, () => null) : Promise<boolean | null>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >undefined : undefined
 >() => null : () => null
 >null : null
@@ -444,18 +444,18 @@ const p35 = p.then(undefined, () => null);
 const p36 = p.then(undefined, () => {});
 >p36 : Promise<boolean | void>
 >p.then(undefined, () => {}) : Promise<boolean | void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >undefined : undefined
 >() => {} : () => void
 
 const p37 = p.then(undefined, () => {throw 1});
 >p37 : Promise<boolean>
 >p.then(undefined, () => {throw 1}) : Promise<boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >undefined : undefined
 >() => {throw 1} : () => never
 >1 : 1
@@ -463,9 +463,9 @@ const p37 = p.then(undefined, () => {throw 1});
 const p38 = p.then(undefined, () => Promise.resolve(1));
 >p38 : Promise<number | boolean>
 >p.then(undefined, () => Promise.resolve(1)) : Promise<number | boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >undefined : undefined
 >() => Promise.resolve(1) : () => Promise<number>
 >Promise.resolve(1) : Promise<number>
@@ -477,9 +477,9 @@ const p38 = p.then(undefined, () => Promise.resolve(1));
 const p39 = p.then(undefined, () => Promise.reject(1));
 >p39 : Promise<boolean>
 >p.then(undefined, () => Promise.reject(1)) : Promise<boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >undefined : undefined
 >() => Promise.reject(1) : () => Promise<never>
 >Promise.reject(1) : Promise<never>
@@ -491,27 +491,27 @@ const p39 = p.then(undefined, () => Promise.reject(1));
 const p40 = p.then(null, undefined);
 >p40 : Promise<boolean>
 >p.then(null, undefined) : Promise<boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >null : null
 >undefined : undefined
 
 const p41 = p.then(null, null);
 >p41 : Promise<boolean>
 >p.then(null, null) : Promise<boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >null : null
 >null : null
 
 const p42 = p.then(null, () => 1);
 >p42 : Promise<number | boolean>
 >p.then(null, () => 1) : Promise<number | boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >null : null
 >() => 1 : () => number
 >1 : 1
@@ -519,9 +519,9 @@ const p42 = p.then(null, () => 1);
 const p43 = p.then(null, () => x);
 >p43 : Promise<any>
 >p.then(null, () => x) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >null : null
 >() => x : () => any
 >x : any
@@ -529,9 +529,9 @@ const p43 = p.then(null, () => x);
 const p44 = p.then(null, () => undefined);
 >p44 : Promise<boolean | undefined>
 >p.then(null, () => undefined) : Promise<boolean | undefined>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >null : null
 >() => undefined : () => undefined
 >undefined : undefined
@@ -539,9 +539,9 @@ const p44 = p.then(null, () => undefined);
 const p45 = p.then(null, () => null);
 >p45 : Promise<boolean | null>
 >p.then(null, () => null) : Promise<boolean | null>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >null : null
 >() => null : () => null
 >null : null
@@ -549,18 +549,18 @@ const p45 = p.then(null, () => null);
 const p46 = p.then(null, () => {});
 >p46 : Promise<boolean | void>
 >p.then(null, () => {}) : Promise<boolean | void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >null : null
 >() => {} : () => void
 
 const p47 = p.then(null, () => {throw 1});
 >p47 : Promise<boolean>
 >p.then(null, () => {throw 1}) : Promise<boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >null : null
 >() => {throw 1} : () => never
 >1 : 1
@@ -568,9 +568,9 @@ const p47 = p.then(null, () => {throw 1});
 const p48 = p.then(null, () => Promise.resolve(1));
 >p48 : Promise<number | boolean>
 >p.then(null, () => Promise.resolve(1)) : Promise<number | boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >null : null
 >() => Promise.resolve(1) : () => Promise<number>
 >Promise.resolve(1) : Promise<number>
@@ -582,9 +582,9 @@ const p48 = p.then(null, () => Promise.resolve(1));
 const p49 = p.then(null, () => Promise.reject(1));
 >p49 : Promise<boolean>
 >p.then(null, () => Promise.reject(1)) : Promise<boolean>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >null : null
 >() => Promise.reject(1) : () => Promise<never>
 >Promise.reject(1) : Promise<never>
@@ -596,9 +596,9 @@ const p49 = p.then(null, () => Promise.reject(1));
 const p50 = p.then(() => "1", undefined);
 >p50 : Promise<string>
 >p.then(() => "1", undefined) : Promise<string>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => "1" : () => string
 >"1" : "1"
 >undefined : undefined
@@ -606,9 +606,9 @@ const p50 = p.then(() => "1", undefined);
 const p51 = p.then(() => "1", null);
 >p51 : Promise<string>
 >p.then(() => "1", null) : Promise<string>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => "1" : () => string
 >"1" : "1"
 >null : null
@@ -616,9 +616,9 @@ const p51 = p.then(() => "1", null);
 const p52 = p.then(() => "1", () => 1);
 >p52 : Promise<string | number>
 >p.then(() => "1", () => 1) : Promise<string | number>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => "1" : () => string
 >"1" : "1"
 >() => 1 : () => number
@@ -627,9 +627,9 @@ const p52 = p.then(() => "1", () => 1);
 const p53 = p.then(() => "1", () => x);
 >p53 : Promise<any>
 >p.then(() => "1", () => x) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => "1" : () => string
 >"1" : "1"
 >() => x : () => any
@@ -638,9 +638,9 @@ const p53 = p.then(() => "1", () => x);
 const p54 = p.then(() => "1", () => undefined);
 >p54 : Promise<string | undefined>
 >p.then(() => "1", () => undefined) : Promise<string | undefined>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => "1" : () => string
 >"1" : "1"
 >() => undefined : () => undefined
@@ -649,9 +649,9 @@ const p54 = p.then(() => "1", () => undefined);
 const p55 = p.then(() => "1", () => null);
 >p55 : Promise<string | null>
 >p.then(() => "1", () => null) : Promise<string | null>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => "1" : () => string
 >"1" : "1"
 >() => null : () => null
@@ -660,9 +660,9 @@ const p55 = p.then(() => "1", () => null);
 const p56 = p.then(() => "1", () => {});
 >p56 : Promise<string | void>
 >p.then(() => "1", () => {}) : Promise<string | void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => "1" : () => string
 >"1" : "1"
 >() => {} : () => void
@@ -670,9 +670,9 @@ const p56 = p.then(() => "1", () => {});
 const p57 = p.then(() => "1", () => {throw 1});
 >p57 : Promise<string>
 >p.then(() => "1", () => {throw 1}) : Promise<string>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => "1" : () => string
 >"1" : "1"
 >() => {throw 1} : () => never
@@ -681,9 +681,9 @@ const p57 = p.then(() => "1", () => {throw 1});
 const p58 = p.then(() => "1", () => Promise.resolve(1));
 >p58 : Promise<string | number>
 >p.then(() => "1", () => Promise.resolve(1)) : Promise<string | number>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => "1" : () => string
 >"1" : "1"
 >() => Promise.resolve(1) : () => Promise<number>
@@ -696,9 +696,9 @@ const p58 = p.then(() => "1", () => Promise.resolve(1));
 const p59 = p.then(() => "1", () => Promise.reject(1));
 >p59 : Promise<string>
 >p.then(() => "1", () => Promise.reject(1)) : Promise<string>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => "1" : () => string
 >"1" : "1"
 >() => Promise.reject(1) : () => Promise<never>
@@ -711,9 +711,9 @@ const p59 = p.then(() => "1", () => Promise.reject(1));
 const p60 = p.then(() => x, undefined);
 >p60 : Promise<any>
 >p.then(() => x, undefined) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => x : () => any
 >x : any
 >undefined : undefined
@@ -721,9 +721,9 @@ const p60 = p.then(() => x, undefined);
 const p61 = p.then(() => x, null);
 >p61 : Promise<any>
 >p.then(() => x, null) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => x : () => any
 >x : any
 >null : null
@@ -731,9 +731,9 @@ const p61 = p.then(() => x, null);
 const p62 = p.then(() => x, () => 1);
 >p62 : Promise<any>
 >p.then(() => x, () => 1) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => x : () => any
 >x : any
 >() => 1 : () => number
@@ -742,9 +742,9 @@ const p62 = p.then(() => x, () => 1);
 const p63 = p.then(() => x, () => x);
 >p63 : Promise<any>
 >p.then(() => x, () => x) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => x : () => any
 >x : any
 >() => x : () => any
@@ -753,9 +753,9 @@ const p63 = p.then(() => x, () => x);
 const p64 = p.then(() => x, () => undefined);
 >p64 : Promise<any>
 >p.then(() => x, () => undefined) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => x : () => any
 >x : any
 >() => undefined : () => undefined
@@ -764,9 +764,9 @@ const p64 = p.then(() => x, () => undefined);
 const p65 = p.then(() => x, () => null);
 >p65 : Promise<any>
 >p.then(() => x, () => null) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => x : () => any
 >x : any
 >() => null : () => null
@@ -775,9 +775,9 @@ const p65 = p.then(() => x, () => null);
 const p66 = p.then(() => x, () => {});
 >p66 : Promise<any>
 >p.then(() => x, () => {}) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => x : () => any
 >x : any
 >() => {} : () => void
@@ -785,9 +785,9 @@ const p66 = p.then(() => x, () => {});
 const p67 = p.then(() => x, () => {throw 1});
 >p67 : Promise<any>
 >p.then(() => x, () => {throw 1}) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => x : () => any
 >x : any
 >() => {throw 1} : () => never
@@ -796,9 +796,9 @@ const p67 = p.then(() => x, () => {throw 1});
 const p68 = p.then(() => x, () => Promise.resolve(1));
 >p68 : Promise<any>
 >p.then(() => x, () => Promise.resolve(1)) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => x : () => any
 >x : any
 >() => Promise.resolve(1) : () => Promise<number>
@@ -811,9 +811,9 @@ const p68 = p.then(() => x, () => Promise.resolve(1));
 const p69 = p.then(() => x, () => Promise.reject(1));
 >p69 : Promise<any>
 >p.then(() => x, () => Promise.reject(1)) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => x : () => any
 >x : any
 >() => Promise.reject(1) : () => Promise<never>
@@ -826,9 +826,9 @@ const p69 = p.then(() => x, () => Promise.reject(1));
 const p70 = p.then(() => undefined, undefined);
 >p70 : Promise<undefined>
 >p.then(() => undefined, undefined) : Promise<undefined>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => undefined : () => undefined
 >undefined : undefined
 >undefined : undefined
@@ -836,9 +836,9 @@ const p70 = p.then(() => undefined, undefined);
 const p71 = p.then(() => undefined, null);
 >p71 : Promise<undefined>
 >p.then(() => undefined, null) : Promise<undefined>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => undefined : () => undefined
 >undefined : undefined
 >null : null
@@ -846,9 +846,9 @@ const p71 = p.then(() => undefined, null);
 const p72 = p.then(() => undefined, () => 1);
 >p72 : Promise<number | undefined>
 >p.then(() => undefined, () => 1) : Promise<number | undefined>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => undefined : () => undefined
 >undefined : undefined
 >() => 1 : () => number
@@ -857,9 +857,9 @@ const p72 = p.then(() => undefined, () => 1);
 const p73 = p.then(() => undefined, () => x);
 >p73 : Promise<any>
 >p.then(() => undefined, () => x) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => undefined : () => undefined
 >undefined : undefined
 >() => x : () => any
@@ -868,9 +868,9 @@ const p73 = p.then(() => undefined, () => x);
 const p74 = p.then(() => undefined, () => undefined);
 >p74 : Promise<undefined>
 >p.then(() => undefined, () => undefined) : Promise<undefined>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => undefined : () => undefined
 >undefined : undefined
 >() => undefined : () => undefined
@@ -879,9 +879,9 @@ const p74 = p.then(() => undefined, () => undefined);
 const p75 = p.then(() => undefined, () => null);
 >p75 : Promise<null | undefined>
 >p.then(() => undefined, () => null) : Promise<null | undefined>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => undefined : () => undefined
 >undefined : undefined
 >() => null : () => null
@@ -890,9 +890,9 @@ const p75 = p.then(() => undefined, () => null);
 const p76 = p.then(() => undefined, () => {});
 >p76 : Promise<void | undefined>
 >p.then(() => undefined, () => {}) : Promise<void | undefined>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => undefined : () => undefined
 >undefined : undefined
 >() => {} : () => void
@@ -900,9 +900,9 @@ const p76 = p.then(() => undefined, () => {});
 const p77 = p.then(() => undefined, () => {throw 1});
 >p77 : Promise<undefined>
 >p.then(() => undefined, () => {throw 1}) : Promise<undefined>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => undefined : () => undefined
 >undefined : undefined
 >() => {throw 1} : () => never
@@ -911,9 +911,9 @@ const p77 = p.then(() => undefined, () => {throw 1});
 const p78 = p.then(() => undefined, () => Promise.resolve(1));
 >p78 : Promise<number | undefined>
 >p.then(() => undefined, () => Promise.resolve(1)) : Promise<number | undefined>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => undefined : () => undefined
 >undefined : undefined
 >() => Promise.resolve(1) : () => Promise<number>
@@ -926,9 +926,9 @@ const p78 = p.then(() => undefined, () => Promise.resolve(1));
 const p79 = p.then(() => undefined, () => Promise.reject(1));
 >p79 : Promise<undefined>
 >p.then(() => undefined, () => Promise.reject(1)) : Promise<undefined>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => undefined : () => undefined
 >undefined : undefined
 >() => Promise.reject(1) : () => Promise<never>
@@ -941,9 +941,9 @@ const p79 = p.then(() => undefined, () => Promise.reject(1));
 const p80 = p.then(() => null, undefined);
 >p80 : Promise<null>
 >p.then(() => null, undefined) : Promise<null>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => null : () => null
 >null : null
 >undefined : undefined
@@ -951,9 +951,9 @@ const p80 = p.then(() => null, undefined);
 const p81 = p.then(() => null, null);
 >p81 : Promise<null>
 >p.then(() => null, null) : Promise<null>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => null : () => null
 >null : null
 >null : null
@@ -961,9 +961,9 @@ const p81 = p.then(() => null, null);
 const p82 = p.then(() => null, () => 1);
 >p82 : Promise<number | null>
 >p.then(() => null, () => 1) : Promise<number | null>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => null : () => null
 >null : null
 >() => 1 : () => number
@@ -972,9 +972,9 @@ const p82 = p.then(() => null, () => 1);
 const p83 = p.then(() => null, () => x);
 >p83 : Promise<any>
 >p.then(() => null, () => x) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => null : () => null
 >null : null
 >() => x : () => any
@@ -983,9 +983,9 @@ const p83 = p.then(() => null, () => x);
 const p84 = p.then(() => null, () => undefined);
 >p84 : Promise<null | undefined>
 >p.then(() => null, () => undefined) : Promise<null | undefined>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => null : () => null
 >null : null
 >() => undefined : () => undefined
@@ -994,9 +994,9 @@ const p84 = p.then(() => null, () => undefined);
 const p85 = p.then(() => null, () => null);
 >p85 : Promise<null>
 >p.then(() => null, () => null) : Promise<null>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => null : () => null
 >null : null
 >() => null : () => null
@@ -1005,9 +1005,9 @@ const p85 = p.then(() => null, () => null);
 const p86 = p.then(() => null, () => {});
 >p86 : Promise<void | null>
 >p.then(() => null, () => {}) : Promise<void | null>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => null : () => null
 >null : null
 >() => {} : () => void
@@ -1015,9 +1015,9 @@ const p86 = p.then(() => null, () => {});
 const p87 = p.then(() => null, () => {throw 1});
 >p87 : Promise<null>
 >p.then(() => null, () => {throw 1}) : Promise<null>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => null : () => null
 >null : null
 >() => {throw 1} : () => never
@@ -1026,9 +1026,9 @@ const p87 = p.then(() => null, () => {throw 1});
 const p88 = p.then(() => null, () => Promise.resolve(1));
 >p88 : Promise<number | null>
 >p.then(() => null, () => Promise.resolve(1)) : Promise<number | null>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => null : () => null
 >null : null
 >() => Promise.resolve(1) : () => Promise<number>
@@ -1041,9 +1041,9 @@ const p88 = p.then(() => null, () => Promise.resolve(1));
 const p89 = p.then(() => null, () => Promise.reject(1));
 >p89 : Promise<null>
 >p.then(() => null, () => Promise.reject(1)) : Promise<null>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => null : () => null
 >null : null
 >() => Promise.reject(1) : () => Promise<never>
@@ -1056,27 +1056,27 @@ const p89 = p.then(() => null, () => Promise.reject(1));
 const p90 = p.then(() => {}, undefined);
 >p90 : Promise<void>
 >p.then(() => {}, undefined) : Promise<void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {} : () => void
 >undefined : undefined
 
 const p91 = p.then(() => {}, null);
 >p91 : Promise<void>
 >p.then(() => {}, null) : Promise<void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {} : () => void
 >null : null
 
 const p92 = p.then(() => {}, () => 1);
 >p92 : Promise<number | void>
 >p.then(() => {}, () => 1) : Promise<number | void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {} : () => void
 >() => 1 : () => number
 >1 : 1
@@ -1084,9 +1084,9 @@ const p92 = p.then(() => {}, () => 1);
 const p93 = p.then(() => {}, () => x);
 >p93 : Promise<any>
 >p.then(() => {}, () => x) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {} : () => void
 >() => x : () => any
 >x : any
@@ -1094,9 +1094,9 @@ const p93 = p.then(() => {}, () => x);
 const p94 = p.then(() => {}, () => undefined);
 >p94 : Promise<void | undefined>
 >p.then(() => {}, () => undefined) : Promise<void | undefined>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {} : () => void
 >() => undefined : () => undefined
 >undefined : undefined
@@ -1104,9 +1104,9 @@ const p94 = p.then(() => {}, () => undefined);
 const p95 = p.then(() => {}, () => null);
 >p95 : Promise<void | null>
 >p.then(() => {}, () => null) : Promise<void | null>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {} : () => void
 >() => null : () => null
 >null : null
@@ -1114,18 +1114,18 @@ const p95 = p.then(() => {}, () => null);
 const p96 = p.then(() => {}, () => {});
 >p96 : Promise<void>
 >p.then(() => {}, () => {}) : Promise<void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {} : () => void
 >() => {} : () => void
 
 const p97 = p.then(() => {}, () => {throw 1});
 >p97 : Promise<void>
 >p.then(() => {}, () => {throw 1}) : Promise<void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {} : () => void
 >() => {throw 1} : () => never
 >1 : 1
@@ -1133,9 +1133,9 @@ const p97 = p.then(() => {}, () => {throw 1});
 const p98 = p.then(() => {}, () => Promise.resolve(1));
 >p98 : Promise<number | void>
 >p.then(() => {}, () => Promise.resolve(1)) : Promise<number | void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {} : () => void
 >() => Promise.resolve(1) : () => Promise<number>
 >Promise.resolve(1) : Promise<number>
@@ -1147,9 +1147,9 @@ const p98 = p.then(() => {}, () => Promise.resolve(1));
 const p99 = p.then(() => {}, () => Promise.reject(1));
 >p99 : Promise<void>
 >p.then(() => {}, () => Promise.reject(1)) : Promise<void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {} : () => void
 >() => Promise.reject(1) : () => Promise<never>
 >Promise.reject(1) : Promise<never>
@@ -1161,9 +1161,9 @@ const p99 = p.then(() => {}, () => Promise.reject(1));
 const pa0 = p.then(() => {throw 1}, undefined);
 >pa0 : Promise<never>
 >p.then(() => {throw 1}, undefined) : Promise<never>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {throw 1} : () => never
 >1 : 1
 >undefined : undefined
@@ -1171,9 +1171,9 @@ const pa0 = p.then(() => {throw 1}, undefined);
 const pa1 = p.then(() => {throw 1}, null);
 >pa1 : Promise<never>
 >p.then(() => {throw 1}, null) : Promise<never>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {throw 1} : () => never
 >1 : 1
 >null : null
@@ -1181,9 +1181,9 @@ const pa1 = p.then(() => {throw 1}, null);
 const pa2 = p.then(() => {throw 1}, () => 1);
 >pa2 : Promise<number>
 >p.then(() => {throw 1}, () => 1) : Promise<number>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {throw 1} : () => never
 >1 : 1
 >() => 1 : () => number
@@ -1192,9 +1192,9 @@ const pa2 = p.then(() => {throw 1}, () => 1);
 const pa3 = p.then(() => {throw 1}, () => x);
 >pa3 : Promise<any>
 >p.then(() => {throw 1}, () => x) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {throw 1} : () => never
 >1 : 1
 >() => x : () => any
@@ -1203,9 +1203,9 @@ const pa3 = p.then(() => {throw 1}, () => x);
 const pa4 = p.then(() => {throw 1}, () => undefined);
 >pa4 : Promise<undefined>
 >p.then(() => {throw 1}, () => undefined) : Promise<undefined>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {throw 1} : () => never
 >1 : 1
 >() => undefined : () => undefined
@@ -1214,9 +1214,9 @@ const pa4 = p.then(() => {throw 1}, () => undefined);
 const pa5 = p.then(() => {throw 1}, () => null);
 >pa5 : Promise<null>
 >p.then(() => {throw 1}, () => null) : Promise<null>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {throw 1} : () => never
 >1 : 1
 >() => null : () => null
@@ -1225,9 +1225,9 @@ const pa5 = p.then(() => {throw 1}, () => null);
 const pa6 = p.then(() => {throw 1}, () => {});
 >pa6 : Promise<void>
 >p.then(() => {throw 1}, () => {}) : Promise<void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {throw 1} : () => never
 >1 : 1
 >() => {} : () => void
@@ -1235,9 +1235,9 @@ const pa6 = p.then(() => {throw 1}, () => {});
 const pa7 = p.then(() => {throw 1}, () => {throw 1});
 >pa7 : Promise<never>
 >p.then(() => {throw 1}, () => {throw 1}) : Promise<never>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {throw 1} : () => never
 >1 : 1
 >() => {throw 1} : () => never
@@ -1246,9 +1246,9 @@ const pa7 = p.then(() => {throw 1}, () => {throw 1});
 const pa8 = p.then(() => {throw 1}, () => Promise.resolve(1));
 >pa8 : Promise<number>
 >p.then(() => {throw 1}, () => Promise.resolve(1)) : Promise<number>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {throw 1} : () => never
 >1 : 1
 >() => Promise.resolve(1) : () => Promise<number>
@@ -1261,9 +1261,9 @@ const pa8 = p.then(() => {throw 1}, () => Promise.resolve(1));
 const pa9 = p.then(() => {throw 1}, () => Promise.reject(1));
 >pa9 : Promise<never>
 >p.then(() => {throw 1}, () => Promise.reject(1)) : Promise<never>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => {throw 1} : () => never
 >1 : 1
 >() => Promise.reject(1) : () => Promise<never>
@@ -1276,9 +1276,9 @@ const pa9 = p.then(() => {throw 1}, () => Promise.reject(1));
 const pb0 = p.then(() => Promise.resolve("1"), undefined);
 >pb0 : Promise<string>
 >p.then(() => Promise.resolve("1"), undefined) : Promise<string>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.resolve("1") : () => Promise<string>
 >Promise.resolve("1") : Promise<string>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
@@ -1290,9 +1290,9 @@ const pb0 = p.then(() => Promise.resolve("1"), undefined);
 const pb1 = p.then(() => Promise.resolve("1"), null);
 >pb1 : Promise<string>
 >p.then(() => Promise.resolve("1"), null) : Promise<string>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.resolve("1") : () => Promise<string>
 >Promise.resolve("1") : Promise<string>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
@@ -1304,9 +1304,9 @@ const pb1 = p.then(() => Promise.resolve("1"), null);
 const pb2 = p.then(() => Promise.resolve("1"), () => 1);
 >pb2 : Promise<string | number>
 >p.then(() => Promise.resolve("1"), () => 1) : Promise<string | number>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.resolve("1") : () => Promise<string>
 >Promise.resolve("1") : Promise<string>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
@@ -1319,9 +1319,9 @@ const pb2 = p.then(() => Promise.resolve("1"), () => 1);
 const pb3 = p.then(() => Promise.resolve("1"), () => x);
 >pb3 : Promise<any>
 >p.then(() => Promise.resolve("1"), () => x) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.resolve("1") : () => Promise<string>
 >Promise.resolve("1") : Promise<string>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
@@ -1334,9 +1334,9 @@ const pb3 = p.then(() => Promise.resolve("1"), () => x);
 const pb4 = p.then(() => Promise.resolve("1"), () => undefined);
 >pb4 : Promise<string | undefined>
 >p.then(() => Promise.resolve("1"), () => undefined) : Promise<string | undefined>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.resolve("1") : () => Promise<string>
 >Promise.resolve("1") : Promise<string>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
@@ -1349,9 +1349,9 @@ const pb4 = p.then(() => Promise.resolve("1"), () => undefined);
 const pb5 = p.then(() => Promise.resolve("1"), () => null);
 >pb5 : Promise<string | null>
 >p.then(() => Promise.resolve("1"), () => null) : Promise<string | null>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.resolve("1") : () => Promise<string>
 >Promise.resolve("1") : Promise<string>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
@@ -1364,9 +1364,9 @@ const pb5 = p.then(() => Promise.resolve("1"), () => null);
 const pb6 = p.then(() => Promise.resolve("1"), () => {});
 >pb6 : Promise<string | void>
 >p.then(() => Promise.resolve("1"), () => {}) : Promise<string | void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.resolve("1") : () => Promise<string>
 >Promise.resolve("1") : Promise<string>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
@@ -1378,9 +1378,9 @@ const pb6 = p.then(() => Promise.resolve("1"), () => {});
 const pb7 = p.then(() => Promise.resolve("1"), () => {throw 1});
 >pb7 : Promise<string>
 >p.then(() => Promise.resolve("1"), () => {throw 1}) : Promise<string>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.resolve("1") : () => Promise<string>
 >Promise.resolve("1") : Promise<string>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
@@ -1393,9 +1393,9 @@ const pb7 = p.then(() => Promise.resolve("1"), () => {throw 1});
 const pb8 = p.then(() => Promise.resolve("1"), () => Promise.resolve(1));
 >pb8 : Promise<string | number>
 >p.then(() => Promise.resolve("1"), () => Promise.resolve(1)) : Promise<string | number>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.resolve("1") : () => Promise<string>
 >Promise.resolve("1") : Promise<string>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
@@ -1412,9 +1412,9 @@ const pb8 = p.then(() => Promise.resolve("1"), () => Promise.resolve(1));
 const pb9 = p.then(() => Promise.resolve("1"), () => Promise.reject(1));
 >pb9 : Promise<string>
 >p.then(() => Promise.resolve("1"), () => Promise.reject(1)) : Promise<string>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.resolve("1") : () => Promise<string>
 >Promise.resolve("1") : Promise<string>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
@@ -1431,9 +1431,9 @@ const pb9 = p.then(() => Promise.resolve("1"), () => Promise.reject(1));
 const pc0 = p.then(() => Promise.reject("1"), undefined);
 >pc0 : Promise<never>
 >p.then(() => Promise.reject("1"), undefined) : Promise<never>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.reject("1") : () => Promise<never>
 >Promise.reject("1") : Promise<never>
 >Promise.reject : <T = never>(reason?: any) => Promise<T>
@@ -1445,9 +1445,9 @@ const pc0 = p.then(() => Promise.reject("1"), undefined);
 const pc1 = p.then(() => Promise.reject("1"), null);
 >pc1 : Promise<never>
 >p.then(() => Promise.reject("1"), null) : Promise<never>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.reject("1") : () => Promise<never>
 >Promise.reject("1") : Promise<never>
 >Promise.reject : <T = never>(reason?: any) => Promise<T>
@@ -1459,9 +1459,9 @@ const pc1 = p.then(() => Promise.reject("1"), null);
 const pc2 = p.then(() => Promise.reject("1"), () => 1);
 >pc2 : Promise<number>
 >p.then(() => Promise.reject("1"), () => 1) : Promise<number>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.reject("1") : () => Promise<never>
 >Promise.reject("1") : Promise<never>
 >Promise.reject : <T = never>(reason?: any) => Promise<T>
@@ -1474,9 +1474,9 @@ const pc2 = p.then(() => Promise.reject("1"), () => 1);
 const pc3 = p.then(() => Promise.reject("1"), () => x);
 >pc3 : Promise<any>
 >p.then(() => Promise.reject("1"), () => x) : Promise<any>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.reject("1") : () => Promise<never>
 >Promise.reject("1") : Promise<never>
 >Promise.reject : <T = never>(reason?: any) => Promise<T>
@@ -1489,9 +1489,9 @@ const pc3 = p.then(() => Promise.reject("1"), () => x);
 const pc4 = p.then(() => Promise.reject("1"), () => undefined);
 >pc4 : Promise<undefined>
 >p.then(() => Promise.reject("1"), () => undefined) : Promise<undefined>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.reject("1") : () => Promise<never>
 >Promise.reject("1") : Promise<never>
 >Promise.reject : <T = never>(reason?: any) => Promise<T>
@@ -1504,9 +1504,9 @@ const pc4 = p.then(() => Promise.reject("1"), () => undefined);
 const pc5 = p.then(() => Promise.reject("1"), () => null);
 >pc5 : Promise<null>
 >p.then(() => Promise.reject("1"), () => null) : Promise<null>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.reject("1") : () => Promise<never>
 >Promise.reject("1") : Promise<never>
 >Promise.reject : <T = never>(reason?: any) => Promise<T>
@@ -1519,9 +1519,9 @@ const pc5 = p.then(() => Promise.reject("1"), () => null);
 const pc6 = p.then(() => Promise.reject("1"), () => {});
 >pc6 : Promise<void>
 >p.then(() => Promise.reject("1"), () => {}) : Promise<void>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.reject("1") : () => Promise<never>
 >Promise.reject("1") : Promise<never>
 >Promise.reject : <T = never>(reason?: any) => Promise<T>
@@ -1533,9 +1533,9 @@ const pc6 = p.then(() => Promise.reject("1"), () => {});
 const pc7 = p.then(() => Promise.reject("1"), () => {throw 1});
 >pc7 : Promise<never>
 >p.then(() => Promise.reject("1"), () => {throw 1}) : Promise<never>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.reject("1") : () => Promise<never>
 >Promise.reject("1") : Promise<never>
 >Promise.reject : <T = never>(reason?: any) => Promise<T>
@@ -1548,9 +1548,9 @@ const pc7 = p.then(() => Promise.reject("1"), () => {throw 1});
 const pc8 = p.then(() => Promise.reject("1"), () => Promise.resolve(1));
 >pc8 : Promise<number>
 >p.then(() => Promise.reject("1"), () => Promise.resolve(1)) : Promise<number>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.reject("1") : () => Promise<never>
 >Promise.reject("1") : Promise<never>
 >Promise.reject : <T = never>(reason?: any) => Promise<T>
@@ -1567,9 +1567,9 @@ const pc8 = p.then(() => Promise.reject("1"), () => Promise.resolve(1));
 const pc9 = p.then(() => Promise.reject("1"), () => Promise.reject(1));
 >pc9 : Promise<never>
 >p.then(() => Promise.reject("1"), () => Promise.reject(1)) : Promise<never>
->p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>p.then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >p : Promise<boolean>
->then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1 | PromiseLike<TResult1>) | null | undefined, onrejected?: ((reason: any) => TResult2 | PromiseLike<TResult2>) | null | undefined) => Promise<TResult1 | TResult2>
+>then : <TResult1 = boolean, TResult2 = never>(onfulfilled?: ((value: boolean) => TResult1) | null | undefined, onrejected?: ((reason: any) => TResult2) | null | undefined) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => Promise.reject("1") : () => Promise<never>
 >Promise.reject("1") : Promise<never>
 >Promise.reject : <T = never>(reason?: any) => Promise<T>
diff --git a/tests/baselines/reference/promiseVoidErrorCallback.types b/tests/baselines/reference/promiseVoidErrorCallback.types
index a1388cb04ef69..47d40b3366061 100644
--- a/tests/baselines/reference/promiseVoidErrorCallback.types
+++ b/tests/baselines/reference/promiseVoidErrorCallback.types
@@ -44,14 +44,14 @@ function f2(x: T1): T2 {
 var x3 = f1()
 >x3 : Promise<{ __t3: string; }>
 >f1()    .then(f2, (e: Error) => {    throw e;})    .then((x: T2) => {    return { __t3: x.__t2 + "bar" };}) : Promise<{ __t3: string; }>
->f1()    .then(f2, (e: Error) => {    throw e;})    .then : <TResult1 = T2, TResult2 = never>(onfulfilled?: (value: T2) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>f1()    .then(f2, (e: Error) => {    throw e;})    .then : <TResult1 = T2, TResult2 = never>(onfulfilled?: (value: T2) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >f1()    .then(f2, (e: Error) => {    throw e;}) : Promise<T2>
->f1()    .then : <TResult1 = T1, TResult2 = never>(onfulfilled?: (value: T1) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>f1()    .then : <TResult1 = T1, TResult2 = never>(onfulfilled?: (value: T1) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >f1() : Promise<T1>
 >f1 : () => Promise<T1>
 
     .then(f2, (e: Error) => {
->then : <TResult1 = T1, TResult2 = never>(onfulfilled?: (value: T1) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = T1, TResult2 = never>(onfulfilled?: (value: T1) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >f2 : (x: T1) => T2
 >(e: Error) => {    throw e;} : (e: Error) => never
 >e : Error
@@ -61,7 +61,7 @@ var x3 = f1()
 
 })
     .then((x: T2) => {
->then : <TResult1 = T2, TResult2 = never>(onfulfilled?: (value: T2) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = T2, TResult2 = never>(onfulfilled?: (value: T2) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >(x: T2) => {    return { __t3: x.__t2 + "bar" };} : (x: T2) => { __t3: string; }
 >x : T2
 
diff --git a/tests/baselines/reference/promises.types b/tests/baselines/reference/promises.types
index 0640f0135498f..f8b55ffb31a02 100644
--- a/tests/baselines/reference/promises.types
+++ b/tests/baselines/reference/promises.types
@@ -1,12 +1,12 @@
 === tests/cases/compiler/promises.ts ===
 interface Promise<T> {
     then<U>(success?: (value: T) => U): Promise<U>;
->then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: T) => U): Promise<U>; <U>(success?: (value: T) => Promise<U>): Promise<U>; }
+>then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: T) => U): Promise<U>; <U>(success?: (value: T) => Promise<U>): Promise<U>; }
 >success : (value: T) => U
 >value : T
 
     then<U>(success?: (value: T) => Promise<U>): Promise<U>;
->then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(success?: (value: T) => U): Promise<U>; <U>(success?: (value: T) => Promise<U>): Promise<U>; }
+>then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(success?: (value: T) => U): Promise<U>; <U>(success?: (value: T) => Promise<U>): Promise<U>; }
 >success : (value: T) => Promise<U>
 >value : T
 
diff --git a/tests/baselines/reference/promisesWithConstraints.types b/tests/baselines/reference/promisesWithConstraints.types
index 367cd6a61a677..a50bb347dc737 100644
--- a/tests/baselines/reference/promisesWithConstraints.types
+++ b/tests/baselines/reference/promisesWithConstraints.types
@@ -1,7 +1,7 @@
 === tests/cases/compiler/promisesWithConstraints.ts ===
 interface Promise<T> {
     then<U>(cb: (x: T) => Promise<U>): Promise<U>;
->then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(cb: (x: T) => Promise<U>): Promise<U>; }
+>then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(cb: (x: T) => Promise<U>): Promise<U>; }
 >cb : (x: T) => Promise<U>
 >x : T
 }
diff --git a/tests/baselines/reference/specializationError.types b/tests/baselines/reference/specializationError.types
index 8f0b5747bfa9d..ff7a73b6b76fa 100644
--- a/tests/baselines/reference/specializationError.types
+++ b/tests/baselines/reference/specializationError.types
@@ -1,7 +1,7 @@
 === tests/cases/compiler/specializationError.ts ===
 interface Promise<T> {
     then<U>(value: T): void;
->then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>): Promise<TResult1 | TResult2>; <U>(value: T): void; }
+>then : { <TResult1 = T, TResult2 = never>(onfulfilled?: (value: T) => TResult1, onrejected?: (reason: any) => TResult2): Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>; <U>(value: T): void; }
 >value : T
 }
 
diff --git a/tests/baselines/reference/syntheticDefaultExportsWithDynamicImports.types b/tests/baselines/reference/syntheticDefaultExportsWithDynamicImports.types
index 3f1ef83a0ae9c..1d306362766d0 100644
--- a/tests/baselines/reference/syntheticDefaultExportsWithDynamicImports.types
+++ b/tests/baselines/reference/syntheticDefaultExportsWithDynamicImports.types
@@ -9,10 +9,10 @@ export = packageExport;
 === tests/cases/compiler/index.ts ===
 import("package").then(({default: foo}) => foo(42));
 >import("package").then(({default: foo}) => foo(42)) : Promise<string>
->import("package").then : <TResult1 = { default: (x: number) => string; }, TResult2 = never>(onfulfilled?: (value: { default: (x: number) => string; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>import("package").then : <TResult1 = { default: (x: number) => string; }, TResult2 = never>(onfulfilled?: (value: { default: (x: number) => string; }) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >import("package") : Promise<{ default: (x: number) => string; }>
 >"package" : "package"
->then : <TResult1 = { default: (x: number) => string; }, TResult2 = never>(onfulfilled?: (value: { default: (x: number) => string; }) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = { default: (x: number) => string; }, TResult2 = never>(onfulfilled?: (value: { default: (x: number) => string; }) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >({default: foo}) => foo(42) : ({ default: foo }: { default: (x: number) => string; }) => string
 >default : any
 >foo : (x: number) => string
diff --git a/tests/baselines/reference/tsbuild/moduleSpecifiers/initial-build/resolves-correctly.js b/tests/baselines/reference/tsbuild/moduleSpecifiers/initial-build/resolves-correctly.js
index 2ba8fa808170b..de82dbe66f4f0 100644
--- a/tests/baselines/reference/tsbuild/moduleSpecifiers/initial-build/resolves-correctly.js
+++ b/tests/baselines/reference/tsbuild/moduleSpecifiers/initial-build/resolves-correctly.js
@@ -14,8 +14,8 @@ exports.__esModule = true;
   "program": {
     "fileInfos": {
       "../../../.ts/lib.es5.d.ts": {
-        "version": "406734842058",
-        "signature": "406734842058"
+        "version": "304693544751",
+        "signature": "304693544751"
       },
       "../../../.ts/lib.es2015.d.ts": {
         "version": "57263133672",
@@ -114,8 +114,8 @@ exports.__esModule = true;
   "program": {
     "fileInfos": {
       "../../../.ts/lib.es5.d.ts": {
-        "version": "406734842058",
-        "signature": "406734842058"
+        "version": "304693544751",
+        "signature": "304693544751"
       },
       "../../../.ts/lib.es2015.d.ts": {
         "version": "57263133672",
@@ -237,8 +237,8 @@ exports.getVar = getVar;
   "program": {
     "fileInfos": {
       "../../../.ts/lib.es5.d.ts": {
-        "version": "406734842058",
-        "signature": "406734842058"
+        "version": "304693544751",
+        "signature": "304693544751"
       },
       "../../../.ts/lib.es2015.d.ts": {
         "version": "57263133672",
diff --git a/tests/baselines/reference/unionAndIntersectionInference1.types b/tests/baselines/reference/unionAndIntersectionInference1.types
index 72d60545e6a51..097ebd832352d 100644
--- a/tests/baselines/reference/unionAndIntersectionInference1.types
+++ b/tests/baselines/reference/unionAndIntersectionInference1.types
@@ -190,12 +190,12 @@ const createTestAsync = (): Promise<ITest> => Promise.resolve().then(() => ({ na
 >createTestAsync : () => Promise<ITest>
 >(): Promise<ITest> => Promise.resolve().then(() => ({ name: 'test' })) : () => Promise<ITest>
 >Promise.resolve().then(() => ({ name: 'test' })) : Promise<ITest | { name: "test"; }>
->Promise.resolve().then : <TResult1 = void, TResult2 = never>(onfulfilled?: (value: void) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>Promise.resolve().then : <TResult1 = void, TResult2 = never>(onfulfilled?: (value: void) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >Promise.resolve() : Promise<void>
 >Promise.resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
 >Promise : PromiseConstructor
 >resolve : { <T>(value: T | PromiseLike<T>): Promise<T>; (): Promise<void>; }
->then : <TResult1 = void, TResult2 = never>(onfulfilled?: (value: void) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
+>then : <TResult1 = void, TResult2 = never>(onfulfilled?: (value: void) => TResult1, onrejected?: (reason: any) => TResult2) => Promise<(TResult1 extends PromiseLike<infer UResult1> ? UResult1 : TResult1) | (TResult2 extends PromiseLike<infer UResult2> ? UResult2 : TResult2)>
 >() => ({ name: 'test' }) : () => { name: "test"; }
 >({ name: 'test' }) : { name: "test"; }
 >{ name: 'test' } : { name: "test"; }