[Bug c++/87665] [8/9 Regression] gcc HEAD (svn: 265340) breaks elements on resize

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87665

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Confirmed that -fcheck-null fixes the miscompilation.