michael@0: // Deleting the .next method makes for-of stop working on arrays.
michael@0: 
michael@0: load(libdir + "asserts.js");
michael@0: load(libdir + "iteration.js");
michael@0: 
michael@0: var iterProto = Object.getPrototypeOf([][std_iterator]());
michael@0: delete iterProto.next;
michael@0: assertThrowsInstanceOf(function () { for (var v of []) ; }, TypeError);