[Bug c/93859] missing test for diagnostic: the omitted middle operand will always be true

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93859

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Another strategy would be make -jN check and grep the *.log files for the
diagnostics.