https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110523
--- Comment #6 from David Binderman <dcb314 at hotmail dot com> ---
The only C++ related commit in that range is:
commit db38b285ba61c5b888adc0d117177bfd774c1153
Author: Patrick Palka <ppa...@redhat.com>
Date: Fri Jun 30 15:05:22 2023 -0400
c++: fix up caching of level lowered ttps
