https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102539
--- Comment #1 from Sergei Trofimovich <slyfox at gcc dot gnu.org> --- Created attachment 51524 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51524&action=edit a.c.c.orig a.c.c.orig is the unreduced preprocessed file with the same warning