/// 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 ch15/15.4/15.4.4/15.4.4.21/15.4.4.21-9-2.js
 * @description Array.prototype.reduce considers new value of elements in array after it is called
 */


function testcase() { 
 
  function callbackfn(prevVal, curVal, idx, obj)
  {
    arr[3] = -2;
    arr[4] = -1;
    return prevVal + curVal;
  }

  var arr = [1,2,3,4,5];
  if(arr.reduce(callbackfn) === 3)
    return true;  
  
 }
runTestCase(testcase);