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

[a...@cloudius-systems.com]

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

--- Comment #3 from Avi Kivity <a...@cloudius-systems.com> ---
Created attachment 47993
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47993&action=edit
reduced test case

Reduced test case, build with g++ -std=gnu++17 -c database

works on gcc 9.2.1, fails on gcc 10.