[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 #12 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Is the engine a C++ application, or C, or something else?