Back out 97036ab72558 which inappropriately compared turds to third parties.
1 var o = { 0: 1, 1: 2, 2: 3, length: 3 };
2 Array.prototype.splice.call(o, 0, 1);
6 assertEq(Object.getOwnPropertyDescriptor(o, 2), undefined);
7 assertEq("2" in o, false);