[Bug libstdc++/103891] clang-13 fails to compile libstdc++'s std::variant<std::vector<int>>: error: attempt to use a deleted function

[slyfox at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103891

--- Comment #8 from Sergei Trofimovich <slyfox at gcc dot gnu.org> ---
That allowed me to build mold-1.0.0 with clang-13 + libstdc++. Thank you!