[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 #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
All of Clang, MSVC and EDG disagree with GCC though, so maybe there's a DR that
we're missing.