diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_8/regress/regress-465220.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_8/regress/regress-465220.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,45 @@
+/* -*- 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 = 465220;
+var summary = 'Do not assert: anti-nesting';
+var actual = '';
+var expect = '';
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+function test()
+{
+  enterFunc ('test');
+  printBugNumber(BUGNUMBER);
+  printStatus (summary);
+
+  expect = 'TypeError: can\'t convert o to primitive type';
+
+  jit(true);
+ 
+  try
+  {
+    var o = {toString: function()(i > 2) ? this : "foo"};
+    var s = "";
+    for (var i = 0; i < 5; i++)
+      s += o + o;
+    print(s);
+    actual = 'No Exception';
+  }
+  catch(ex)
+  {
+    actual = 'TypeError: can\'t convert o to primitive type';
+  }
+  jit(false);
+
+  reportCompare(expect, actual, summary);
+
+  exitFunc ('test');
+}