[Bug c++/110836] [C++20] g++ should report when there is no way to create structure or class

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110836

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Andris Pavenis from comment #0)
> At least warning would be required (preferably enabled by default or -Wall)
> It could even be an error 

No it couldn't.