[Bug debug/94277] [9/10 Regression] error: undef.c: ‘-fcompare-debug’ failure (length) since r9-6413-g1db01ff96aa5ce5c

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94277

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Actually even older.  Anyway, this is another case where -w affects
-fcompare-debug.