[Bug c++/108974] New: std::barrier except completion function which is not manifestly noexcept

[oliver.rosten at googlemail dot com via Gcc-bugs]

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

            Bug ID: 108974
           Summary: std::barrier except completion function which is not
                    manifestly noexcept
           Product: gcc
           Version: 12.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: oliver.rosten at googlemail dot com
  Target Milestone: ---

std::barrier<std::function<void()>> b{1, [](){}};

is accepted by gcc (and clang).

However, it fails on MSVC - as I think it should - since std::function's call
operator isn't manifestly noexcept.

https://godbolt.org/z/7vfoa1qhn