[Bug c++/107211] New: GCC compiles invalid use of non static member function in noexcept operator

[jlame646 at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107211

            Bug ID: 107211
           Summary: GCC compiles invalid use of non static member function
                    in noexcept operator
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jlame646 at gmail dot com
  Target Milestone: ---

The following invalid program is accepted by gcc trunk. Demo:
https://godbolt.org/z/fez5GqKdT

```

struct C
{
    void func() noexcept
    {

    }
    void f() noexcept(noexcept(C::func)) //gcc compiles this
    {
    }
};
```
This has been discussed here:
https://stackoverflow.com/questions/74024368/gcc-compiles-use-of-noexcept-operator-but-clang-and-msvc-rejects-it