[Bug c++/102022] incorrect code with -O2

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102022

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This part of the code looks like there could be a huge alias violation waiting
to happen
*(char**)&head