[Bug libstdc++/94033] [10 Regression] is_trivially_copy_constructible<> fails with compiler error on complicated object with private default constructor

[avi@cloudius-systems.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94033

--- Comment #16 from Avi Kivity <avi@cloudius-systems.com> ---
I confirm this fixes my original problem, not just the reduced test case.