[Bug c++/87729] Please include -Woverloaded-virtual in -Wall

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87729

--- Comment #14 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Stephan Bergmann from comment #12)
> This still starts to produces spurious warnings for diamond inheritance:

Fixed, thanks.