https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109765
--- Comment #6 from Sam James <sjames at gcc dot gnu.org> --- Report is at https://marc.info/?l=gmp-bugs&m=168367093126416&w=2. I ended up sending it a few times because I've had mail delivery problems before and I didn't realise the list was moderated even for subscribers. Oops.