[Bug c/122773] [16 Regression] ice in collect_fallthrough_labels, at gimplify.cc:2694

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122773

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Reduced -Wimplicit-fallthrough -O1 -ftrivial-auto-var-init=zero:
void *l;
int
foo ()
{
  switch (0)
    {
      while (0)
        ;
      goto *l;
    }
}