[Bug libstdc++/71579] type_traits miss checks for type completeness in some traits

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71579

--- Comment #24 from Jonathan Wakely <redi at gcc dot gnu.org> ---
See PR 106838 for the __has_virtual_destructor bug.