[Bug c++/77368] New: Private static member visible to templated subclass

["albin.olsson at volvocars dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77368

            Bug ID: 77368
           Summary: Private static member visible to templated subclass
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: albin.olsson at volvocars dot com
  Target Milestone: ---

The following code is accepted by g++, but only if B is a templated class:

struct A
{
private:
    static const int private_of_A = 5;
};

template <typename T>
struct B : public A
{
    int get()
    {
        return private_of_A;
    }
};

int main()
{
    B<int> b;
    return b.get();
}


This problem exists for all version of gcc I tested, which are:
x86-64 gcc 4.8.4
x86-64 gcc 6.2 (g++ ('Compiler) 6.2.0)
ARM64 gcc 4.8 (aarch64-linux-gnu-g++ (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.1)
5.4.0 20160609)
The two latter ones via https://gcc.godbolt.org/#