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consistentAliasVsNonAliasRecordBehavior.errors.txt
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consistentAliasVsNonAliasRecordBehavior.errors.txt
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tests/cases/compiler/consistentAliasVsNonAliasRecordBehavior.ts(18,5): error TS2741: Property 'a' is missing in type 'Record<string, string>' but required in type 'Record2<"a", string>'.
tests/cases/compiler/consistentAliasVsNonAliasRecordBehavior.ts(22,5): error TS2741: Property 'a' is missing in type 'Record2<string, string>' but required in type 'Record<"a", string>'.
tests/cases/compiler/consistentAliasVsNonAliasRecordBehavior.ts(34,5): error TS2741: Property 'a' is missing in type 'Record<string, T>' but required in type 'Record2<"a", T>'.
tests/cases/compiler/consistentAliasVsNonAliasRecordBehavior.ts(38,5): error TS2741: Property 'a' is missing in type 'Record2<string, T>' but required in type 'Record<"a", T>'.
==== tests/cases/compiler/consistentAliasVsNonAliasRecordBehavior.ts (4 errors) ====
// TODO: FIXME: All the below cases labeled `no error` _should be an error_, and are only prevented from so being
// by incorrect variance-based relationships
// Ref: https://github.com/Microsoft/TypeScript/issues/29698
type Record2<K extends keyof any, T> = {
[P in K]: T;
};
function defaultRecord(x: Record<'a', string>, y: Record<string, string>) {
x = y; // no error, but error expected.
}
function customRecord(x: Record2<'a', string>, y: Record2<string, string>) {
x = y; // no error, but error expected.
}
function mixed1(x: Record2<'a', string>, y: Record<string, string>) {
x = y; // error
~
!!! error TS2741: Property 'a' is missing in type 'Record<string, string>' but required in type 'Record2<"a", string>'.
}
function mixed2(x: Record<'a', string>, y: Record2<string, string>) {
x = y; // error
~
!!! error TS2741: Property 'a' is missing in type 'Record2<string, string>' but required in type 'Record<"a", string>'.
}
function defaultRecord2<T>(x: Record<'a', T>, y: Record<string, T>) {
x = y; // no error, but error expected.
}
function customRecord2<T>(x: Record2<'a', T>, y: Record2<string, T>) {
x = y; // no error, but error expected.
}
function mixed3<T>(x: Record2<'a', T>, y: Record<string, T>) {
x = y; // error
~
!!! error TS2741: Property 'a' is missing in type 'Record<string, T>' but required in type 'Record2<"a", T>'.
}
function mixed4<T>(x: Record<'a', T>, y: Record2<string, T>) {
x = y; // error
~
!!! error TS2741: Property 'a' is missing in type 'Record2<string, T>' but required in type 'Record<"a", T>'.
}