[Bug c++/69922] [6 Regression] Bogus -Wnonnull-compare for: ... ? static_cast<T*>(this) : nullptr

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69922

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |diagnostic
   Target Milestone|---                         |6.0
            Summary|Bogus -Wnonnull-compare     |[6 Regression] Bogus
                   |for: ... ?                  |-Wnonnull-compare for: ...
                   |static_cast<T*>(this) :     |? static_cast<T*>(this) :
                   |nullptr                     |nullptr

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Most likely it is due to multiple inheritance which causes GCC internally to
emit a comparison and GCC decides to warn about that comparison when it should
not.