https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84953
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I disagree, it is a well documented behavior and user gets exactly what he
asked for. There is no questionable or problematic behavior with those
options. It is not any different from strchr ("abcd", 'e') and many other
functions that can be determined at compile time to return NULL.
