[Bug c++/60842] New: In-class initializer causes a strange error

[kariya_mitsuru at hotmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60842

            Bug ID: 60842
           Summary: In-class initializer causes a strange error
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: kariya_mitsuru at hotmail dot com

The sample code below causes a strange error.

=========================== source code ===========================
namespace N {
    class I {};
}

template <typename, typename>
class J {};

class S {
    J<int, N::I> j = J<int, N::I>{};
};

int main() {}
=========================== source code ===========================

========================== error messages ==========================
prog.cc:9:32: error: invalid use of '::'
     J<int, N::I> j = J<int, N::I>{};
                                ^
prog.cc:9:32: error: expected ';' at end of member declaration
prog.cc:9:33: error: expected unqualified-id before '>' token
     J<int, N::I> j = J<int, N::I>{};
                                 ^
prog.cc:9:24: error: wrong number of template arguments (1, should be 2)
     J<int, N::I> j = J<int, N::I>{};
                        ^
prog.cc:6:7: error: provided for 'template<class, class> class J'
 class J {};
       ^
========================== error messages ==========================

I think that the sample code should be compiled successfully.

cf. http://melpon.org/wandbox/permlink/h96WGv3EW3DOyHnB