[Bug c++/118383] [c++-14,17,20] Constexpr default copy-assign operator of derived class with virtual base seems should not be allowed before C++23

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118383

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #1)
> Confirmed. Looks like it was introduced in GCC 6 when constexpr operator=
> was added for C++14.

That is r6-7277-gb47d1d904d5397 .