michael@0: // Iterator.prototype.next throws if applied to a non-iterator that inherits from an iterator.
michael@0: 
michael@0: load(libdir + "asserts.js");
michael@0: load(libdir + "iteration.js");
michael@0: 
michael@0: var it = [1, 2][std_iterator]();
michael@0: var v = Object.create(it);
michael@0: assertThrowsInstanceOf(function () { Iterator.prototype.next.call(v); }, TypeError);