[Bug c++/35112] New: [4.1/4.2/4.3 regression] ICE and broken diagnostic with ambiguous class name

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

The following invalid testcase triggers a broken error message
('tree_list' not supported by dump_decl) and an ICE since GCC 4.1.0:

============================
namespace X { struct A; }
namespace Y { struct A; }
namespace Z { struct A; }

using namespace X;
using namespace Y;
using namespace Z;

A* p;
============================

bug.cc:9: error: reference to 'A' is ambiguous
#'tree_list' not supported by dump_decl#<declaration error>
tree check: expected tree that contains 'decl minimal' structure, have
'tree_list' in location_of, at cp/error.c:2211
Please submit a full bug report, [etc.]


-- 
           Summary: [4.1/4.2/4.3 regression] ICE and broken diagnostic with
                    ambiguous class name
           Product: gcc
           Version: 4.3.0
            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=35112