Fix tdz analysis for reassigned captured for bindings (#15278)

packages/babel-plugin-transform-block-scoping/src/validation.ts

@@ -131,9 +131,9 @@ function getTDZReplacement(
   if (skipTDZChecks.has(id)) return;
   skipTDZChecks.add(id);
 
-  const bindingPath = path.scope.getBinding(id.name).path;
+  const bindingPath = path.scope.getBinding(id.name)?.path;
 
-  if (bindingPath.isFunctionDeclaration()) return;
+  if (!bindingPath || bindingPath.isFunctionDeclaration()) return;
 
   const status = getTDZStatus(path, bindingPath);
   if (status === "outside") return;

packages/babel-plugin-transform-block-scoping/test/fixtures/regression/updated-for-binding-with-tdz-enabled/input.js

@@ -0,0 +1,4 @@
+for (let index = 0; index < 10; index++) {
+  index++;
+  () => index;
+}

packages/babel-plugin-transform-block-scoping/test/fixtures/regression/updated-for-binding-with-tdz-enabled/options.json

@@ -0,0 +1,3 @@
+{
+  "plugins": [["transform-block-scoping", { "tdz": true }]]
+}

packages/babel-plugin-transform-block-scoping/test/fixtures/regression/updated-for-binding-with-tdz-enabled/output.js

@@ -0,0 +1,8 @@
+var _loop = function (_index) {
+  _index++;
+  () => _index;
+  index = _index;
+};
+for (var index = 0; index < 10; index++) {
+  _loop(index);
+}