diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_8/regress/regress-477234.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_8/regress/regress-477234.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,50 @@
+/* -*- 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 = 477234;
+var summary = 'Do not assert: v != JSVAL_ERROR_COOKIE';
+var actual = '';
+var expect = '';
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+function test()
+{
+  enterFunc ('test');
+  printBugNumber(BUGNUMBER);
+  printStatus (summary);
+
+  jit(true);
+ 
+  for (iters = 0; iters < 11500; ++iters) {
+    for each (let x in ['', '', '']){}
+    eval("Object.defineProperty(__proto__, 'x', " +
+         "{" +
+         "  enumerable: true, configurable: true," +
+         "  get: function(){}" +
+         "});");
+    var a = uneval;
+    delete uneval;
+    uneval = a;
+    var b = toSource;
+    delete toSource;
+    toSource = b;
+    var c = toString;
+    delete toString;
+    toString = c;
+  }
+
+  jit(true);
+
+  delete __proto__.x;
+
+  reportCompare(expect, actual, summary);
+
+  exitFunc ('test');
+}