// 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.lastindexof description: > Array.prototype.lastIndexOf - deleting property of prototype causes prototype index property not to be visited on an Array-like Object ---*/ var arr = { 2: 2, length: 20 }; Object.defineProperty(arr, "3", { get: function() { delete Object.prototype[1]; return 0; }, configurable: true }); Object.prototype[1] = 1; assert.sameValue(Array.prototype.lastIndexOf.call(arr, 1), -1, 'Array.prototype.lastIndexOf.call(arr, 1)'); reportCompare(0, 0);