[Bug c++/81359] [7/8 Regression] bogus error: constructor required before non-static data member for ‘Foo::Bar::test’ has been parsed

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81359

Jason Merrill <jason at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |jason at gcc dot gnu.org

--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Reduced:

template<typename _Tp, typename = decltype(_Tp())>
static int test(int);

template<typename>
static void test(...);

template <class T, class = decltype(test<T>(0))>
struct A { };

struct B
{
  struct C {
    int i = 0;
  };
  A<C> a;
};