diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_5/extensions/regress-452168.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_5/extensions/regress-452168.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,44 @@
+// |reftest| skip-if(Android)
+/* -*- 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 = 452168;
+var summary = 'Do not crash with gczeal 2, JIT: @ avmplus::List or @ nanojit::LirBuffer::validate';
+var actual = 'No Crash';
+var expect = 'No Crash';
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+function test()
+{
+  enterFunc ('test');
+  printBugNumber(BUGNUMBER);
+  printStatus (summary);
+
+  if (typeof gczeal == 'undefined')
+  {
+      expect = actual = 'Test requires gczeal, skipped.';
+  }
+  else
+  {
+    // Enumerate the global once before we turn on gczeal, so we're not
+    // trying to do all the enumerate hook object creation with a gc on
+    // every object, because that makes tests time out.
+    for (z in this);
+    jit(true);
+    gczeal(2);
+
+    var a, b; gczeal(2); (function() { for (var p in this) { } })();
+
+    gczeal(0);
+    jit(false);
+  }
+  reportCompare(expect, actual, summary);
+
+  exitFunc ('test');
+}