[Bug c++/93103] Generic function syntax does not check return concept

[mateusz.pusz at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93103

--- Comment #2 from Mateusz Pusz <mateusz.pusz at gmail dot com> ---
It might be a regression because I remember it working fine. Now it fails
again. Check here: https://godbolt.org/z/-K39X7.