https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118733
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |INVALID
Status|UNCONFIRMED |RESOLVED
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is a race condition of having it existed and not existing from a different
thread. So yes this is undefined behavior.
