Multiple Zipped Observers never complete #1812

    Observable merged1 = Observable.zip(Observable.range(0, 1026), Observable.range(0, 1026),
            (o, e) -> new int[]{o, e});
    Observable merged2 = Observable.<int[], Integer, int[]>zip(merged1, Observable.range(0, 1026),
            (o, e) -> new int[]{o[0], o[1], e}).serialize();
    merged2.subscribe(
            (o) -> System.out.println(o),
            e -> {},
            () -> {
                System.out.println("This never prints");
            }
    );