michael@0: var actual = '';
michael@0: 
michael@0: var a = [0, 1];
michael@0: a.x = 10;
michael@0: delete a.x;
michael@0: for (var i in a) {
michael@0:     appendToActual(i);
michael@0:     a.pop();
michael@0: }
michael@0: 
michael@0: assertEq(actual, "0,");