[Bug libstdc++/106611] std::is_nothrow_copy_constructible returns wrong result

[nikolasklauser at berlin dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106611

--- Comment #2 from Nikolas Klauser <nikolasklauser at berlin dot de> ---
(In reply to Jonathan Wakely from comment #1)
> The noexcept specifier is wrong, but is ignored. The implicitly defined copy
> constructor is noexcept, so the trait gives the right answer.

static_assert(!noexcept(std::declval<const CopyConstructible&>())));

is fine. So one of them must be wrong.