[Bug c++/99637] bit_cast doesn't work with padding bits and it should

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99637

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #5)
> (In reply to Jonathan Wakely from comment #4)
> > So the result cannot be created.
> 
> Not during constant evaluation, anyway.

And outside of constant evaluation with undefined behavior with the exception
of bit_cast to unsigned char / std::byte?