michael@0: var p = Proxy.create({
michael@0:   has : function(id) {}
michael@0: });
michael@0: Object.prototype.__proto__ = p;
michael@0: function f() {
michael@0:   if (/a/.exec("a"))
michael@0:     return 1;
michael@0:   return 0;
michael@0: }
michael@0: delete RegExp.prototype.test;
michael@0: f();
michael@0: