[Bug libstdc++/99846] [11 regression] std::variant comparison operator error for recursive type

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99846

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Actually that's not true, that commit *is* on the gcc-10 branch. I'll bisect.