src/third_party/mozjs-45/js/src/jit-test/tests/basic/bug885648.js

gczeal(4,1);
var iterable = {persistedProp: 17};
iterable.__iterator__ = function() {
    yield ["foo", 2];
    yield ["bar", 3];
};
var it = Iterator(iterable);
assertEq(it.next().toString(), "foo,2");
assertEq(it.next().toString(), "bar,3");