[Bug c++/19502] New: duplicate diagnostic for invalid template constant parameter

["reichelt at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

Since gcc 3.3.3 the compiler issues a duplicate diagnostic for the
following invalid code snippet (before we got an ICE):

=========================================
template<typename T> struct A
{
    template<T> struct B;
};

A<void> a;
=========================================

bug.cc: In instantiation of 'A<void>':
bug.cc:6:   instantiated from here
bug.cc:3: error: 'void' is not a valid type for a template constant parameter
bug.cc:3: error: 'void' is not a valid type for a template constant parameter

-- 
           Summary: duplicate diagnostic for invalid template constant
                    parameter
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Keywords: diagnostic
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: reichelt at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19502