[Bug c++/78001] [7 Regression] ncurses build error

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78001

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
So I think GCC is correct here.  A is a non-dependent base so it can be looked
at definition time.  m_fn1 is not a const qualified either.

Does other compiler reject:
class A {
protected:
  void m_fn1();
};
struct B : A {
  void m_fn2() const { m_fn1(); }
};


How about:
class A {
protected:
  void m_fn1();
};
template <class> struct B : A {
  void m_fn2() const { m_fn1(); }
};

B<int> a;
void f(void) { a.m_fn2(); }