https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103726
--- Comment #1 from cqwrteur <unlvsur at live dot com> --- also here is a weird thing i find. coroutine_handle has a template specification of std::hash, but std::hash is in <functional> which is not freestanding. What should standard library do? Should libstdc++ provide it or not?
