michael@0: var wm = new WeakMap;
michael@0: var A = [];
michael@0: for (var i = 0; i < 1024; ++i) {
michael@0:     var key = {i:i};
michael@0:     wm.set(key, i);
michael@0:     A.push(key);
michael@0: }
michael@0: gc();
michael@0: for (var i in A) {
michael@0:     var key = A[i];
michael@0:     assertEq(wm.has(key), true);
michael@0: }