[Bug c++/26938] New: [4.0/4.1/4.2 regression] ICE with wrong number of template parameters

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

The following invalid testcase causes an ICE since GCC 3.1:

========================================
template<int, int = 0> struct A;

template<int> struct A
{
  A();
};

A<0> a;
========================================

bug.cc:1: error: previous declaration 'template<int <anonymous>, int
<anonymous> > struct A'
bug.cc:3: error: used 2 template parameter(s) instead of 1
bug.cc: In constructor 'A<<anonymous>, <anonymous> >::A() [with int <anonymous>
= 0]':
bug.cc:8:   instantiated from here
bug.cc:5: internal compiler error: tree check: accessed elt 2 of tree_vec with
1 elts in tsubst, at cp/pt.c:7080
Please submit a full bug report, [etc.]


-- 
           Summary: [4.0/4.1/4.2 regression] ICE with wrong number of
                    template parameters
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Keywords: ice-on-invalid-code, 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=26938