michael@0: function f(s) {
michael@0:     var obj = {m: function () { return a; }};
michael@0:     eval(s);
michael@0:     return obj;
michael@0: }
michael@0: var obj = f("var a = 'right';");
michael@0: var a = 'wrong';
michael@0: assertEq(obj.m(), 'right');