[Bug c++/92973] [10 Regression] Silently accepting defaulted comparison operators in C++11 .. 17

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92973

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 47517
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47517&action=edit
gcc10-pr92973.patch

Untested fix.