1 files changed, 46 insertions, 0 deletions
diff --git a/js/src/tests/test262/annexB/language/function-code/block-decl-func-skip-early-err-for-in.js b/js/src/tests/test262/annexB/language/function-code/block-decl-func-skip-early-err-for-in.js
new file mode 100644
index 0000000000..aed0866402
--- /dev/null
+++ b/js/src/tests/test262/annexB/language/function-code/block-decl-func-skip-early-err-for-in.js
@@ -0,0 +1,46 @@
+// This file was procedurally generated from the following sources:
+// - src/annex-b-fns/func-skip-early-err-for-in.case
+// - src/annex-b-fns/func/block.template
+/*---
+description: Extension not observed when creation of variable binding would produce an early error (for-of statement) (Block statement in function scope containing a function declaration)
+esid: sec-web-compat-functiondeclarationinstantiation
+flags: [generated, noStrict]
+info: |
+    B.3.3.1 Changes to FunctionDeclarationInstantiation
+
+    [...]
+    ii. If replacing the FunctionDeclaration f with a VariableStatement that
+        has F as a BindingIdentifier would not produce any Early Errors for
+        func and F is not an element of BoundNames of argumentsList, then
+    [...]
+---*/
+
+(function() {
+  assert.throws(ReferenceError, function() {
+    f;
+  }, 'An initialized binding is not created prior to evaluation');
+  assert.sameValue(
+    typeof f,
+    'undefined',
+    'An uninitialized binding is not created prior to evaluation'
+  );
+
+  for (let f in { key: 0 }) {
+
+  {
+    function f() {  }
+  }
+
+  }
+
+  assert.throws(ReferenceError, function() {
+    f;
+  }, 'An initialized binding is not created following evaluation');
+  assert.sameValue(
+    typeof f,
+    'undefined',
+    'An uninitialized binding is not created following evaluation'
+  );
+}());
+
+reportCompare(0, 0);