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

[redi at gcc dot gnu.org]

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

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think that change to the compiler was OK, but it looks like the accompanying
"simplification" of <type_traits> was the culprit. Thanks for the bisection.