diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_5/extensions/catchguard-001.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_5/extensions/catchguard-001.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,47 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * 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/. */
+
+
+test();
+
+function test()
+{
+  enterFunc ("test");
+
+  var EXCEPTION_DATA = "String exception";
+  var e = "foo";
+  var caught = false;
+
+  printStatus ("Basic catchguard test.");
+   
+  try
+  {   
+    throw EXCEPTION_DATA;  
+  }
+  catch (e if true)
+  {
+    caught = true;
+    e = "this change should not propagate outside of this scope";
+  }
+  catch (e if false)
+  {  
+    reportCompare('PASS', 'FAIL', "Catch block (e if false) should not have executed.");
+  }
+  catch (e)
+  {  
+    reportCompare('PASS', 'FAIL', "Catch block (e) should not have executed.");
+  }
+
+  if (!caught)
+    reportCompare('PASS', 'FAIL', "Exception was never caught.");
+   
+  if (e != "foo")
+    reportCompare('PASS', 'FAIL', "Exception data modified inside catch() scope should " +
+		  "not be visible in the function scope (e = '" +
+		  e + "'.)");
+
+  reportCompare('PASS', 'PASS', '');
+  exitFunc ("test");
+}