[Bug libstdc++/121890] Several algorithms do not use iterator's difference_type for arithmetic

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121890

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
updated patch:
https://gcc.gnu.org/pipermail/gcc-patches/2025-September/695191.html