diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_7/regress/regress-414553.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_7/regress/regress-414553.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,22 @@
+/* -*- 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 = 414553;
+printBugNumber(BUGNUMBER);
+printStatus(summary);
+
+var expected = '1,2,3,4';
+var actual = let (a = 1, [b,c] = [2,3], d = 4) ( String([a,b,c,d]) );
+
+reportCompare(expected, actual, 'destructuring assignment in let');
+
+function f() {
+  let (a = 1, [b,c] = [2,3], d = 4) {
+    return String([a,b,c,d]);
+  }
+}
+
+reportCompare(expected, f(), 'destructuring assignment in let inside func');