[Bug libstdc++/82366] std::regex constructor called from shared library throws std::bad_cast

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82366

--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
My best guess for what's happening in the original report is that the shared
library is being loaded into a running process which uses an older version of
libstdc++, and so the locale facets needed by the shared library were never
created at startup. When std::regex tried to use those facets, it fails to find
it.

But without a way to reproduce the problem, this will never get resolved.