https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116657
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> --- Are you sure you're using the main format? I didn't backport r15-1663-g0ca8d56f208571 to gcc-14 yet, so it doesn't support the vanguard format. But that means gcc-14 fails with 2024a too, it's nothing to do with the 2024b update.
