[Bug c++/66919] New: [5 Regression] C++14 ICE during error reporting

["jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66919

            Bug ID: 66919
           Summary: [5 Regression] C++14 ICE during error reporting
           Product: gcc
           Version: 5.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jakub at gcc dot gnu.org
                CC: jason at gcc dot gnu.org, paolo at gcc dot gnu.org
  Target Milestone: ---

template <int>
struct A {
  template <typename F, typename R, typename T>
    static auto run (F fn, R, T) { auto r =  fn (); }
};
template <typename F, typename T>
auto foo (F fn, T)
{
  A <0>::run (fn, 0, 0);
}
struct B;
struct C {
  typedef B D;
};
struct E {
  virtual void bar (const int &);
};
template <typename C>
struct F : E {
  typedef typename C::D::G G;
  void bar (const G &);
  typename C::D::H I;
};
struct J { struct K {}; };
template <typename T>
void
F<T>::bar (const G &)
{
  auto s = I;
  typedef decltype (s) L;
  auto u =[&](L) { auto t = foo (J::K (), 0); };
}
struct B {
  typedef int G;
  typedef int H;
};
struct M : F <C> {
  M () {}
};

ICEs with -std=c++1y starting with r211188 and it got fixed (or went latent) on
the trunk with r222150.