Back out 97036ab72558 which inappropriately compared turds to third parties.
1 // Array.keys() and .entries() on an empty array produce empty iterators
4 var ki = arr.keys(), ei = arr.entries();
5 var p = Object.getPrototypeOf(ki);
6 assertEq(Object.getPrototypeOf(ei), p);
10 for (let [k, v] of ei)