[Bug c++/26572] New: Invalid local class definition not diagnosed

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

The following invalid code snippet is accepted since at least GCC 2.95.3:

==================================
template<int> void foo()
{
  struct A;
  struct B : A {};
}

template void foo<0>();
==================================

As A is incomplete, the definition of the local class B should trigger
an error. This could already be diagnosed during definition of the
template function, but is not even diagnosed at instantiation time.

It is only diagnosed (at instantiation time) when B is used inside
the function (for example in a variable declaration "B b;").


-- 
           Summary: Invalid local class definition not diagnosed
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Keywords: accepts-invalid, monitored
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: reichelt at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26572