Method of class Comparator

    default <S extends T> Comparator<S> thenComparing(Comparator<? super T> other)

Specifies

Throws:
    NullPointerException - if the argument is null.


This assertion is not satisfied by build 81-lambda.

The following

        ((Comparator<?>)(a, b) -> 0).thenComparing((Comparator)null);

will not throw anything.

The following JCK test will fail due to this issue:
api/java_util/Comparator/DefenderMethods.html#DefenderMethods[thenComparingWithNull]