[Bug c++/27951] New: [4.0/4.1/4.2 regression] ICE with invalid anonymous union

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

The following invalid code snippet triggers an ICE in the C++ frontend since
GCC 4.0.0:

======================================
void foo()
{
    int i;
    union { int i; };
}
======================================

bug.cc: In function 'void foo()':
bug.cc:4: error: redeclaration of 'int i'
bug.cc:3: error: 'int i' previously declared here
bug.cc:4: internal compiler error: tree check: expected tree that contains
'decl minimal' structure, have 'error_mark'  in finish_anon_union, at
cp/decl2.c:1121
Please submit a full bug report, [etc.]

Will post a patch soon.


-- 
           Summary: [4.0/4.1/4.2 regression] ICE with invalid anonymous
                    union
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Keywords: ice-on-invalid-code, error-recovery, 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=27951