[Bug c++/51586] New: [4.7 Regression] ICE with invalid union

[reichelt at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51586

             Bug #: 51586
           Summary: [4.7 Regression] ICE with invalid union
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: reich...@gcc.gnu.org


The following invalid code snippet triggers an ICE on trunk:

=======================
union U
{
  union U { int i; };
};
=======================

bug.cc:3:9: error: 'U::U' has the same name as the class in which it is
declared
bug.cc:3:9: error: 'union' tag used in naming '<type error>' [-fpermissive]
bug.cc:3:9: internal compiler error: tree check: expected class 'type', have
'exceptional' (error_mark) in cp_parser_check_class_key, at cp/parser.c:22627
Please submit a full bug report, [etc.]