[Bug libstdc++/91067] [9/10 Regression] Clang compiler can't link executable if std::filesystem::directory_iterator is encountered

[ostash at ostash dot kiev.ua]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91067

--- Comment #11 from Viktor Ostashevskyi <ostash at ostash dot kiev.ua> ---
I assume that problem comes from explicit instantiation:

extern template class __shared_ptr<filesystem::_Dir>;

which was added in c8fb3443911413cc88f316305fc6b7bf4861ccaa.

It prevent Clang in emitting "C2" version of constructors on its own.