diff -r 000000000000 -r 6474c204b198 js/src/tests/ecma_3/Statements/regress-444979.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/ecma_3/Statements/regress-444979.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,43 @@
+/* -*- 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 = 444979;
+var summary = 'switch -0 is same as switch 0';
+var actual = '';
+var expect = '';
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+function test()
+{
+  enterFunc ('test');
+  printBugNumber(BUGNUMBER);
+  printStatus (summary);
+ 
+  expect = 'y==0';
+  actual = '';
+
+  var shortSwitch = 'var y=-0;switch (y){case 0: actual="y==0";  break; default: actual="y!=0";}';
+  eval(shortSwitch);
+
+  reportCompare(expect, actual, summary + ': shortSwitch');
+
+  actual = '';
+
+  var longSwitch = 'var y=-0;var t=0;switch(y){case -1:';
+  for (var i = 0; i < 64000; i++) {
+    longSwitch += ' t++;';
+  }
+  longSwitch += ' break; case 0: actual = "y==0"; break; default: actual = "y!=0";}';
+  eval(longSwitch);
+
+  reportCompare(expect, actual, summary + ': longSwitch');
+
+  exitFunc ('test');
+}