[Bug libstdc++/90266] missing or broken check for vector::size() exceeding max_size()

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90266

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think I fixed this in r263789 for PR 78448 and then changed the return value
of max_size() in r265021 for PR 87544.