[Bug c++/58053] New: Bogus "error ... is private ... within this context"

[ppluzhnikov at google dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58053

            Bug ID: 58053
           Summary: Bogus "error ... is private ... within this context"
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ppluzhnikov at google dot com

Test case:

class Foo {
  struct Bar { };
  friend class F;
};

class F
#ifdef BUG
  : public Foo::Bar
#endif
{
  void Fn() { Foo::Bar b; }
};

Using "g++ (GCC) 4.9.0 20130730 (experimental)", the test compiles (clearly
Foo::Bar is accessible to F::Fn()), but fails with -DBUG:

t.cc:2:10: error: ‘struct Foo::Bar’ is private
   struct Bar { };
          ^
t.cc:8:17: error: within this context
   : public Foo::Bar
                 ^