[Bug c++/18471] New: [4.0 regression] ICE on invalid template class

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

The following invalid code causes an ICE on mainline:

=============================
typedef int X;
template<X> struct X {};
=============================

bug.cc:2: error: 'template<int <anonymous> > struct X' redeclared as different
kind of symbol
bug.cc:1: error: previous declaration of 'typedef int X'
bug.cc:2: internal compiler error: tree check: expected class 'declaration',
have 'exceptional' (error_mark) in push_template_decl_real, at cp/pt.c:3152
Please submit a full bug report, [etc.]

-- 
           Summary: [4.0 regression] ICE on invalid template class
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Keywords: ice-on-invalid-code, error-recovery, monitored
          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=18471