[Bug c++/33837] New: [4.1/4.2/4.3 regresssion] ICE with invalid use of decltype

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

The following invalid code snippet triggers an ICE on mainline:

===============================
void foo()
{
  __decltype A::foo();
}
===============================

bug.cc: In function 'void foo()':
bug.cc:3: error: 'A' was not declared in this scope
bug.cc:3: internal compiler error: tree check: expected class 'type', have
'exceptional' (error_mark) in build_reference_type_for_mode, at tree.c:5463
Please submit a full bug report, [etc.]

The problem appeared between 2007-07-16 and 2007-08-15, presumably with
the introduction of decltype:

2007-07-27  Douglas Gregor  <doug.gregor@gmail.com>

        * typeck.c (structural_comptypes): Compare DECLTYPE_TYPE nodes.
        * cp-tree.def (DECLTYPE_TYPE): New.
        * error.c (dump_type): Dump DECLTYPE_TYPE nodes.
        ...


-- 
           Summary: [4.1/4.2/4.3 regresssion] ICE with invalid use of
                    decltype
           Product: gcc
           Version: 4.3.0
            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=33837