https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93641
--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:a59aa3026821ac4883198f1858984b6f78612ae6 commit r10-6547-ga59aa3026821ac4883198f1858984b6f78612ae6 Author: Jakub Jelinek <ja...@redhat.com> Date: Mon Feb 10 15:50:17 2020 +0100 c-format: -Wformat-diag fix [PR93641] The last argument to strncasecmp is incorrect, so it matched even when can%' wasn't followed by t. Also, the !ISALPHA (format_chars[1]) test looks pointless, format_chars[1] must be ' if strncasecmp succeeded and so will never be ISALPHA. 2020-02-10 Jakub Jelinek <ja...@redhat.com> PR other/93641 * c-format.c (check_plain): Fix up last argument of strncasecmp. Remove useless extra test. * gcc.dg/format/gcc_diag-11.c (test_cdiag_bad_words): Add two further tests.