successfulAsList(ImmutableList.of(SettableFuture.create())).cancel(true);

    /*
     * Complex (combined.cancel -> input.cancel -> other.set -> setOneValue),
     * to show that this isn't just about problems with the input future we just
     * cancelled:
     */
    final SettableFuture<String> future1 = SettableFuture.create();
    final SettableFuture<String> future2 = SettableFuture.create();