diff -r 000000000000 -r 6474c204b198 js/src/tests/test262/ch13/13.1/13.1-1-1.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/test262/ch13/13.1/13.1-1-1.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,21 @@
+/// Copyright (c) 2012 Ecma International.  All rights reserved. 
+/// Ecma International makes this code available under the terms and conditions set
+/// forth on http://hg.ecmascript.org/tests/test262/raw-file/tip/LICENSE (the 
+/// "Use Terms").   Any redistribution of this code must retain the above 
+/// copyright and this notice and otherwise comply with the Use Terms.
+/**
+ * @path ch13/13.1/13.1-1-1.js
+ * @description Duplicate identifier allowed in non-strict function declaration parameter list
+ */
+
+
+function testcase()
+{
+  try 
+  {
+    eval('function foo(a,a){}');
+    return true;
+  }
+  catch (e) { return false }
+  }
+runTestCase(testcase);