[Bug c++/28114] New: [4.0/4.1/4.2 regression] ICE with struct definition in argument of template function

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

The following invalid testcase causes an ICE since GCC 4.0.0:

===========================================
template<int> void foo(struct {}*);

void bar()
{
  foo<0>(0);
}
===========================================

bug.cc:1: error: template class without a name
bug.cc:1: error: types may not be defined in parameter types
bug.cc:5: error: conflicting declaration 'struct<anonymous>'
bug.cc:5: error: 'struct<anonymous>' has a previous declaration as
'struct<anonymous>'
bug.cc: In function 'void bar()':
bug.cc:5: internal compiler error: tree check: expected tree that contains
'decl minimal' structure, have 'error_mark'  in pushtag, at
cp/name-lookup.c:4865
Please submit a full bug report, [etc.]

Moreover only the second line of the error message makes sense.
The "conflicting declaration" message is completely bogus, and the
first line looks bogus to me, too.


-- 
           Summary: [4.0/4.1/4.2 regression] ICE with struct definition in
                    argument of template function
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Keywords: ice-on-invalid-code, error-recovery, diagnostic,
                    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=28114