diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_5/extensions/regress-443569.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_5/extensions/regress-443569.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,41 @@
+/* -*- 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 = 443569;
+var summary = 'Do not assert: OBJ_IS_NATIVE(obj)';
+var actual = 'No Crash';
+var expect = 'No Crash';
+
+
+printBugNumber(BUGNUMBER);
+printStatus (summary);
+
+if (typeof window != 'undefined')
+{
+  // delay test driver end
+  gDelayTestDriverEnd = true;
+
+  window.addEventListener("load", boom, false);
+}
+else
+{
+  reportCompare(expect, actual, summary);
+}
+
+function boom()
+{
+  var r = RegExp.prototype;
+  r["-1"] = 0;
+  Array.prototype.__proto__ = r;
+  []["-1"];
+
+  reportCompare(expect, actual, summary);
+
+  gDelayTestDriverEnd = false;
+  jsTestDriverEnd();
+}
+
+