[Bug c/77955] -Wimplicit-fallthrough=1 issue

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77955

--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
It'll be hard to "fix" the first testcase:
<https://gcc.gnu.org/ml/gcc-patches/2016-10/msg00841.html>.