diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_5/Regress/regress-280769-3.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_5/Regress/regress-280769-3.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,45 @@
+/* -*- 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 crash on overflow of 64K boundary in number of classes in regexp';
+var actual = 'No Crash';
+var expect = 'No Crash';
+
+printBugNumber(BUGNUMBER);
+printStatus (summary);
+
+var N = 100 * 1000;
+
+status = summary + ' ' + inSection(3) + ' (new RegExp("[0][1]...[99999]").exec("") ';
+
+var a = new Array(N);
+
+for (var i = 0; i != N; ++i) {
+  a[i] = i;
+}
+
+var str = '['+a.join('][')+']'; // str is [0][1][2]...[<PRINTED N-1>]
+
+try
+{
+  var re = new RegExp(str);
+}
+catch(e)
+{
+  printStatus('Exception creating RegExp: ' + e);
+}
+
+try
+{
+  re.exec('');
+}
+catch(e)
+{
+  printStatus('Exception executing RegExp: ' + e);
+}
+
+reportCompare(expect, actual, status);