[Bug c++/92067] __is_constructible(incomplete_type) should make the program ill-formed

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92067

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jason Merrill from comment #4)
> Do other standard library implementations depend on the compiler to diagnose
> this?

I don't think they enforce it at all (it's IFNDR).