michael@0: // 'this' in a generator-expression non-strict function produces the expected
michael@0: // object.
michael@0: 
michael@0: Number.prototype.iters = function () {
michael@0:     return [(this for (x of [0])),
michael@0:             (this for (y of [0]))];
michael@0: };
michael@0: 
michael@0: var [a, b] = (3).iters();
michael@0: var three = a.next();
michael@0: assertEq(Object.prototype.toString.call(three), '[object Number]');
michael@0: assertEq(+three, 3);
michael@0: assertEq(b.next(), three);