https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108295
--- Comment #5 from Daniel Lundin <daniel.lundin.mail at gmail dot com> --- (In reply to Andrew Pinski from comment #4) > Try -pedantic-errors. Yes I already did and then the error appears. But that would imply that this is a non-standard GNU extension and not an upcoming standard C23 feature, which still doesn't seem correct. If the intention was to add this as a GNU extension until formal release of C23, then the use of such GNU extensions will behave inconsistently between gcc <10.4 and gcc >11.0 when using the same compiler options. And I don't think that's documented anywhere either.
