[Bug c/79959] -Wimplicit-fallthrough doesn't recognize some more complex exit cases

[egallager at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79959

--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #3)
> (In reply to Marek Polacek from comment #2)
> > Should be possible to fix this.  Mine.
> 
> For gcc 9?

...er, 10 now, I guess?