From a0bd18e7089d80b9257502d2350842b598f6548c Mon Sep 17 00:00:00 2001
From: Sneh Khatri <khatris2014@gmail.com>
Date: Thu, 6 Jan 2022 22:10:44 +0530
Subject: [PATCH] Fix: typescript declare global conflict with TSModuleBlock
 declaration

---
 .../namespace/declare-global-nested-namespace/input.ts         | 3 +++
 .../namespace/declare-global-nested-namespace/output.mjs       | 1 +
 packages/babel-traverse/src/scope/index.ts                     | 3 +++
 3 files changed, 7 insertions(+)
 create mode 100644 packages/babel-plugin-transform-typescript/test/fixtures/namespace/declare-global-nested-namespace/input.ts
 create mode 100644 packages/babel-plugin-transform-typescript/test/fixtures/namespace/declare-global-nested-namespace/output.mjs

diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/namespace/declare-global-nested-namespace/input.ts b/packages/babel-plugin-transform-typescript/test/fixtures/namespace/declare-global-nested-namespace/input.ts
new file mode 100644
index 000000000000..13f0c52527b4
--- /dev/null
+++ b/packages/babel-plugin-transform-typescript/test/fixtures/namespace/declare-global-nested-namespace/input.ts
@@ -0,0 +1,3 @@
+declare global { namespace globalThis { var i18n: any; } }
+
+export class i18n {}
\ No newline at end of file
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/namespace/declare-global-nested-namespace/output.mjs b/packages/babel-plugin-transform-typescript/test/fixtures/namespace/declare-global-nested-namespace/output.mjs
new file mode 100644
index 000000000000..2112258a3b74
--- /dev/null
+++ b/packages/babel-plugin-transform-typescript/test/fixtures/namespace/declare-global-nested-namespace/output.mjs
@@ -0,0 +1 @@
+export class i18n {}
diff --git a/packages/babel-traverse/src/scope/index.ts b/packages/babel-traverse/src/scope/index.ts
index e2eb17d8f724..100a7df6fa22 100644
--- a/packages/babel-traverse/src/scope/index.ts
+++ b/packages/babel-traverse/src/scope/index.ts
@@ -745,6 +745,9 @@ export default class Scope {
     path: NodePath,
     bindingPath: NodePath = path,
   ) {
+    if (path.isVariableDeclarator() && path.scope.path.isTSModuleBlock()) {
+      return;
+    }
     if (!kind) throw new ReferenceError("no `kind`");
 
     if (path.isVariableDeclaration()) {