[Bug c++/106223] difference in behaviour between no optimization and -O for specialization of std::forward

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106223

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I really think this is undefined behavior and specialization of std::forward is
not allowed.