michael@0: load(libdir + "asserts.js");
michael@0: assertThrowsInstanceOf(
michael@0:     function() {
michael@0:         function foo() {}
michael@0:         foo = null;
michael@0:         (function bar(e) {
michael@0:             try {
michael@0:                 (function() { e; });
michael@0:                 throw 1;
michael@0:             } catch (e) {
michael@0:                 foo();
michael@0:             }
michael@0:         })();
michael@0:     },
michael@0:     TypeError);