[Bug c++/96077] GCC accepts ill-legal local enum definition

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96077

--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Doesn't even need to be in the ?: operator:

int
main ()
{
  enum { E = (2 } e;
  if (E != 2)
    __builtin_abort ();
}