diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_5/Regress/regress-418540.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_5/Regress/regress-418540.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,62 @@
+// |reftest| skip-if(xulRuntime.OS=="WINNT"&&isDebugBuild) slow
+/* -*- 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 = 418540;
+var summary = 'Do not assert: OBJ_IS_NATIVE(obj)';
+var actual = 'No Crash';
+var expect = 'No Crash';
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+function test()
+{
+  enterFunc ('test');
+  printBugNumber(BUGNUMBER);
+  printStatus (summary);
+
+  if (typeof window == 'undefined')
+  {
+    expect = actual = 'Browser test only - skipped';
+    reportCompare(expect, actual, summary);
+  }
+  else
+  {
+    gDelayTestDriverEnd = true;
+    window.onload = boom;
+  }
+
+  exitFunc ('test');
+}
+
+function boom()
+{
+  var p;
+  var b = document.createElement("body");
+  var v = document.createElement("div");
+  b.getAttribute("id")
+  v.getAttribute("id")
+  for (p in v) { }
+  for (p in b) { }
+  b.__proto__ = [];
+  try { aC(v, null); } catch(e) { }
+  try { aC(b, null); } catch(e) { }
+
+  setTimeout(check, 1000);
+}
+
+function aC(r, n) { r.appendChild(n); }
+
+function check()
+{
+  expect = actual = 'No Crash';
+  gDelayTestDriverEnd = false;
+  reportCompare(expect, actual, summary);
+  jsTestDriverEnd();
+}