[Bug c++/92951] extern variable declaration doesn't behave properly for me

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92951

--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
NOTE yes there is a missing -Wshadow warning, I will file it in a second.