text: // Copyright (c) 2012 Ecma International.  All rights reserved.
  // This code is governed by the BSD license found in the LICENSE file.
  
  /*---
  esid: sec-array.prototype.reduce
  es5id: 15.4.4.21-8-b-iii-1-20
  description: >
      Array.prototype.reduce - element to be retrieved is own accessor
      property without a get function that overrides an inherited
      accessor property on an Array
  ---*/
  
  var testResult = false;
  
  function callbackfn(prevVal, curVal, idx, obj) {
    if (idx === 1) {
      testResult = (prevVal === undefined);
    }
  }
  
  Array.prototype[0] = 0;
  var arr = [, 1, 2];
  Object.defineProperty(arr, "0", {
    set: function() {},
    configurable: true
  });
  
  arr.reduce(callbackfn);
  
  assert(testResult, 'testResult !== true');
  