michael@0: (function() {
michael@0:     var s = "__proto__";
michael@0:     assertEq(arguments[s], Object.prototype);   
michael@0: })();
michael@0: 
michael@0: Object.defineProperty(Object.prototype, "foo", {
michael@0:     get:function() {
michael@0:         this.bar = 42;
michael@0:         return 41
michael@0:     }
michael@0: });
michael@0: 
michael@0: (function() {
michael@0:     var s = "foo";
michael@0:     assertEq(arguments[s], 41);
michael@0:     s = "bar";
michael@0:     assertEq(arguments[s], 42);
michael@0:     assertEq("bar" in Object.prototype, false);
michael@0: })();