diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_8_1/jit/regress-489682.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_8_1/jit/regress-489682.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,33 @@
+/* -*- 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 = 489682;
+var summary = 'TM: wrong number with nested type-unstable loops';
+var actual = '';
+var expect = '';
+
+printBugNumber(BUGNUMBER);
+printStatus (summary);
+
+jit(true);
+
+var v = 0;
+
+for each (var a in [0, {}, {}, {}]) {
+  print(v);
+  v = v >>> 0;
+  for each (var b in [{}, {}, new String(''), 42, new String(''), {}, 42]) 
+           {
+           }
+         }
+print(v);
+
+jit(false);
+
+expect = '0';
+actual = v + '';
+
+reportCompare(expect, actual, summary);