[Bug libstdc++/108974] std::barrier accepts completion function which is not manifestly noexcept

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108974

--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Patch posted that implements the proposed resolution:
https://gcc.gnu.org/pipermail/gcc-patches/2025-January/673200.html