michael@0: function setprop()
michael@0: {
michael@0:   var obj = { a:-1 };
michael@0:   var obj2 = { b:-1, a:-1 };
michael@0:   for (var i = 0; i < 20; i++) {
michael@0:     obj2.b = obj.a = i;
michael@0:   }
michael@0:   return [obj.a, obj2.a, obj2.b].toString();
michael@0: }
michael@0: assertEq(setprop(), "19,-1,19");