https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109570
--- Comment #6 from Xi Ruoyao <xry111 at gcc dot gnu.org> --- (In reply to Christophe Lyon from comment #5) > Not sure how to update/fix the testcases though? > Since they get the declaration of fclose from stdio.h, we'd need to make > dg-error conditional to the glibc version in use, which seems unpractical. > > Should we instead remove #include <stdio.h> and provide suitable > declarations in the testcase? I guess we need to change return ferror (f) || fclose (f) != 0; to return !f || ferror (f) || fclose (f) != 0; Because "failing to check if the file is opened successfully" is definitely a bug, and these tests are intended not to raise warnings for a bug-free program. BTW ferror(f) segfaults as well when f is NULL, so IMO we should mark it nonnull in Glibc as well.
