diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_5/extensions/regress-44009.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_5/extensions/regress-44009.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,52 @@
+/* -*- 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/. */
+
+/*
+ * Date: 26 Feb 2001
+ * See http://bugzilla.mozilla.org/show_bug.cgi?id=44009
+ *
+ * SUMMARY:  Testing that we don't crash on obj.toSource()
+ */
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 44009;
+var summary = "Testing that we don't crash on obj.toSource()";
+var obj1 = {};
+var sToSource = '';
+var self = this;  //capture a reference to the global JS object -
+
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+
+function test()
+{
+  enterFunc ('test');
+  printBugNumber(BUGNUMBER);
+  printStatus (summary);
+
+  var obj2 = {};
+
+  // test various objects and scopes -
+  testThis(self);
+  testThis(this);
+  testThis(obj1);
+  testThis(obj2);
+
+  reportCompare('No Crash', 'No Crash', '');
+
+  exitFunc ('test');
+}
+
+
+// We're just testing that we don't crash by doing this -
+function testThis(obj)
+{
+  sToSource = obj.toSource();
+  obj.prop = obj;
+  sToSource = obj.toSource();
+}