diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_5/Regress/regress-280769-5.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_5/Regress/regress-280769-5.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,30 @@
+/* -*- 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 = 280769;
+var summary = 'Do not overflow 64K string offset';
+var actual = 'No Crash';
+var expect = 'No Crash';
+
+printBugNumber(BUGNUMBER);
+printStatus (summary);
+
+var N = 100 * 1000;
+
+var prefix = new Array(N).join("a"); // prefix is sequence of N "a"
+
+var suffix = "111";
+
+var re = new RegExp(prefix+"0?"+suffix);  // re is /aaa...aaa0?111/
+
+var str_to_match = prefix+suffix;  // str_to_match is "aaa...aaa111"
+
+var index = str_to_match.search(re);
+
+expect = 0;
+actual = index;
+
+reportCompare(expect, actual, summary);