[Bug c++/18652] New: [4.0 regression] ICE on invalid redeclaration

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

Mainline crashes on the following invalid code snippet:

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

bug.cc:6: error: 'template<int <anonymous> > struct A' redeclared as different
kind of symbol
bug.cc:5: error: previous declaration of 'int A'
bug.cc:6: 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.]

The release branches are not affected.

According to Phils's regression hunter the regression was introduced in
February:
: Search converges between 2004-02-01-trunk (#445) and 2004-03-01-trunk (#446).

-- 
           Summary: [4.0 regression] ICE on invalid redeclaration
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Keywords: ice-on-invalid-code, error-recovery, monitored
          Severity: minor
          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=18652