[Bug c++/86569] -Wnonnull-compare affects code generation

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86569

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Can you link all the issues you find to a meta-bug (just use the one that says
we want to disable -Wall in stage3?)