[Bug c++/70513] [4.9/5/6 Regression] ICE on invalid C++ code on x86_64-linux-gnu: Segmentation fault

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70513

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
No, I misunderstood, that would make us accept the code.  But at least I have
simpler testcase:

struct S
{
  enum E : int;
  enum S::E : int { foo } e;
};