[Bug libstdc++/113099] locale without RTTI uses dynamic_cast before gcc 13.2 or has ODR violation since gcc 13.2

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113099

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It's mostly OK to mix code with -frtti and -fno-rtti, but sometimes it bites
you.

The crash with older releases seems like __dynamic_cast should gracefully
handle missing RTTI and just fail, not segfault.

The ODR violation in current releaes is a non-issue. The code has the same
semantics either way.