michael@0: function testUndefinedPropertyAccess() {
michael@0:     var x = [1,2,3];
michael@0:     var y = {};
michael@0:     var a = { foo: 1 };
michael@0:     y.__proto__ = x;
michael@0:     var z = [x, x, x, y, y, y, y, a, a, a];
michael@0:     var s = "";
michael@0:     for (var i = 0; i < z.length; ++i)
michael@0:         s += z[i].foo;
michael@0:     return s;
michael@0: }
michael@0: assertEq(testUndefinedPropertyAccess(), "undefinedundefinedundefinedundefinedundefinedundefinedundefined111");