http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48851
--- Comment #8 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-05-04 11:04:28 UTC --- (In reply to comment #7) > 0 is a valid null pointer constant in C. If you want to use NULL as a > sentinel > you must always cast it. I'm sure that is something nobody does. Thus 0 is an extremely stupid NULL pointer definition.