michael@0: 
michael@0: // Don't use NativeIterator cache for objects with dense elements.
michael@0: 
michael@0: function bar(a) {
michael@0:   var n = 0;
michael@0:   for (var b in a) { n++; }
michael@0:   return n;
michael@0: }
michael@0: 
michael@0: function foo() {
michael@0:   var x = {a:0,b:1};
michael@0:   var y = {a:0,b:1};
michael@0:   y[0] = 2;
michael@0:   y[1] = 3;
michael@0:   for (var i = 0; i < 10; i++) {
michael@0:     assertEq(bar(x), 2);
michael@0:     assertEq(bar(y), 4);
michael@0:   }
michael@0: }
michael@0: foo();