[Bug c++/115715] gcc seems to incorrectly accept illegal constexpr constructor in virtual inheritance and static template class member

[xry111 at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115715

--- Comment #4 from Xi Ruoyao <xry111 at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #3)
> Confirmed. This is a QoI issue though. We should do more rejections on
> non-dependent types inside templates.

Should we open an enhancement like "reject templates which will be ill-formed
in a way independent to template parameters" and mark all these reports
duplicates of it?  Otherwise it's too easy to construct 1000+ different cases
and filling up the bugzilla.