[Bug c++/105846] [C++2b] constexpr unique_ptr doesn't work with virtual types

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105846

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Created attachment 53084
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53084&action=edit
Second example -std=c++20