JSTests/test262/test/built-ins/Array/prototype/some/15.4.4.17-7-6.js

// 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.some
es5id: 15.4.4.17-7-6
description: >
    Array.prototype.some visits deleted element in array after the
    call when same index is also present in prototype
---*/

  function callbackfn(val, idx, obj)
  {
    delete arr[4];
    if(val < 5)
      return false;
    else
      return true;
  }


  Array.prototype[4] = 5;
  var arr = [1,2,3,4,5];

  var res = arr.some(callbackfn) ;
  delete Array.prototype[4];

assert.sameValue(res, true, 'res');