michael@0: function f(x) {
michael@0:     return x["__proto__"]
michael@0: }
michael@0: var res = 0;
michael@0: for each(a in [{}, null]) {
michael@0:     try {
michael@0:         f(a);
michael@0: 	res += 20;
michael@0:     } catch (e) {
michael@0: 	assertEq(e instanceof TypeError, true);
michael@0: 	assertEq(e.message.indexOf("is null") > 0, true);
michael@0: 	res += 50;
michael@0:     }
michael@0: }
michael@0: assertEq(res, 70);