[Bug c++/107211] [12/13/14/15 Regression] GCC compiles invalid use of non static member function in noexcept operator

[luigighiron at gmail dot com via Gcc-bugs]

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

--- Comment #5 from Halalaluyafail3 <luigighiron at gmail dot com> ---
This also applies to non member functions, for example:

void f(int),f(float);
noexcept(f);

using T=int;
noexcept(0 .~T);

Are both accepted and are similarly invalid.