[Bug c++/104594] narrowing of -1 to unsigned char not detected with requires concepts

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104594

Jason Merrill <jason at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://gcc.gnu.org/bugzill
                   |                            |a/show_bug.cgi?id=99795

--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> ---
This looks like the same issue as PR99795, to which I attached a partial patch.
 Feel free to use whatever of that looks useful to you.