text: // Copyright (c) 2012 Ecma International.  All rights reserved.
  // This code is governed by the BSD license found in the LICENSE file.
  
  /*---
  es5id: 15.4.4.15-8-a-6
  description: >
      Array.prototype.lastIndexOf -  deleted properties of step 5 are
      visible here on an Array
  ---*/
  
          var arr = [];
          arr[10] = "10";
          arr.length = 20;
  
          var fromIndex = {
              valueOf: function () {
                  delete arr[10];
                  return 11;
              }
          };
  
  assert.sameValue(arr.lastIndexOf("10", fromIndex), -1, 'arr.lastIndexOf("10", fromIndex)');
  