[Bug ada/47666] New: [4.6 Regression] ICE in dfs_walk_once

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47666

           Summary: [4.6 Regression] ICE in dfs_walk_once
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: ada
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: jakub@gcc.gnu.org


template <typename T>
struct A
{
  int a;
};
template <typename T>
struct B : public A <T>
{
};
class D : public B <D *>
{
  virtual D & operator= (const D &);
};
class E : virtual public D
{
};
class F : public E
{
  virtual void foo ();
};

ICEs in dfs_walk_once, starting in between r161566 and r161597.