The Tor Browser / file revision

 /// 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.

 /**

  * Refer 11.1.5; 

  *   The production

  *      PropertyNameAndValueList :  PropertyNameAndValueList , PropertyAssignment

  *    4. If previous is not undefined then throw a SyntaxError exception if any of the following conditions are true

  *      a. This production is contained in strict code and IsDataDescriptor(previous) is true and IsDataDescriptor(propId.descriptor) is true

  *

  * @path ch11/11.1/11.1.5/11.1.5_4-4-a-3.js

  * @description Object literal - Duplicate data property name allowed gets last defined value

  */

 function testcase() {

   var o = eval("({foo:0,foo:1});");

   return o.foo===1;

   }

 runTestCase(testcase);