[Bug c++/114395] [c++20+] std::is_constructible_v result of const reference incorrect

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114395

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I disagree, A(b) definitely changed meaning. It now initializes A by copying
the base part of b

This is a combination of aggregates being allowed to have base classes and
paren-init doing aggregate-init.