diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_7/expressions/destructuring-scope.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_7/expressions/destructuring-scope.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,63 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 'none';
+var summary = 'Test destructuring assignments for differing scopes';
+var actual = '';
+var expect = '';
+
+printBugNumber(BUGNUMBER);
+printStatus (summary);
+
+function f() {
+  var x = 3;
+  if (x > 0) {
+    let {a:x} = {a:7};
+    if (x != 7) 
+      throw "fail";
+  }
+  if (x != 3) 
+    throw "fail";
+}
+
+function g() {
+  for (var [a,b] in {x:7}) {
+    if (a != "x" || b != 7) 
+      throw "fail";
+  }
+
+  {
+    for (let [a,b] in {y:8}) {
+      if (a != "y" || b != 8) 
+        throw "fail";
+    }
+  }
+
+  if (a != "x" || b != 7) 
+    throw "fail";
+}
+
+f();
+g();
+
+if (typeof a != "undefined" || typeof b != "undefined" || typeof x != "undefined")
+  throw "fail";
+
+function h() {
+  for ([a,b] in {z:9}) {
+    if (a != "z" || b != 9) 
+      throw "fail";
+  }
+}
+
+h();
+
+if (a != "z" || b != 9) 
+  throw "fail";
+
+
+reportCompare(expect, actual, summary);
+