https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116218
--- Comment #1 from Sam James <sjames at gcc dot gnu.org> ---
All versions I tried fail, although the diagnostic improved between 11 and 12:
11:
```
In file included from /usr/include/stdio.h:970,
from
/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/system.h:46,
from
/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/gengtype.cc:26:
In function 'int printf(const char*, ...)',
inlined from 'void dump_fileloc(int, fileloc)' at
/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/gengtype.cc:4836:10,
inlined from 'void dump_pair(int, pair_p)' at
/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/gengtype.cc:4960:16,
inlined from 'void dump_type_u_s(int, type_p)' at
/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/gengtype.cc:4856:17,
inlined from 'void dump_type(int, type_p)' at
/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/gcc/gengtype.cc:4938:21:
/usr/include/bits/stdio2.h:118:23: warning: '%s' directive argument is null
[-Wformat-overflow=]
118 | return __printf_chk (__USE_FORTIFY_LEVEL - 1, __fmt, __va_arg_pack
());
|
~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
```
