Both spliterator's methods

 - forEachRemaining()
 - tryAdvance()

specify
 
 "throws NullPointerException if the specified action is null"

This doesn't happen for a spliterator produced as below:

        Stream.builder().build().spliterator().forEachRemaining((Consumer)null);
        Stream.builder().build().spliterator().tryAdvance((Consumer)null);


The following test JCK will fail due to this issue

api/java_util/stream/Stream/Builder.html#Builder[checkSpliterator]