michael@0: function f() {
michael@0:     var ret;
michael@0:     for (var i = 0; i < 10; ++i) {
michael@0:         let (local = 3) {
michael@0:             ret = function() { print(local++); }
michael@0:         }
michael@0:     }
michael@0:     return ret;
michael@0: }
michael@0: f()();  // test.js:5: ReferenceError: local is not defined
michael@0: