[Bug c++/65061] New: [4.8/4.9/5 Regression] Issue with using declaration and member class template

[paolo.carlini at oracle dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65061

            Bug ID: 65061
           Summary: [4.8/4.9/5 Regression] Issue with using declaration
                    and member class template
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: paolo.carlini at oracle dot com

Noticed while working on c++/60894. Between 4.6 and 4.7 we started rejecting
the below:

struct B
{
  template<typename T>
  struct S {};
};

struct D : B
{
  using B::S;

  template<typename T>
  void doIt(/*struct*/ S<T>&);
};