[Bug c++/27805] New: [4.2 regression] ICE with ptr-to-member of incomplete class

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

The following invalid code snippet causes an ICE on mainline:

=====================
struct A;

void foo()
{
    int A::* p;
    A a;
    a.*p;
}
=====================

bug.cc: In function 'void foo()':
bug.cc:6: error: aggregate 'A a' has incomplete type and cannot be defined
bug.cc:7: internal compiler error: tree check: expected class 'type', have
'exceptional' (error_mark) in build_m_component_ref, at cp/typeck2.c:1215
Please submit a full bug report, [etc.]


-- 
           Summary: [4.2 regression] ICE with ptr-to-member of incomplete
                    class
           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=27805