diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_5/Regress/regress-283477.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_5/Regress/regress-283477.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,27 @@
+/* -*- 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 = 283477;
+var summary = 'a.lastIndexOf(b, c) should return -1 when there is no match';
+var actual = '';
+var expect = '';
+var status;
+
+enterFunc ('test');
+printBugNumber(BUGNUMBER);
+printStatus (summary);
+ 
+status = summary + ' ' + inSection(1) + " " + '"".lastIndexOf("hello", 0);';
+expect = -1;
+actual = "".lastIndexOf("hello", 0);
+reportCompare(expect, actual, status);
+
+status = summary + ' ' + inSection(2) + " " + ' "".lastIndexOf("hello");';
+expect = -1;
+actual = "".lastIndexOf("hello");
+reportCompare(expect, actual, status);
+
+exitFunc ('test');