[Bug c++/18731] New: [3.3/3.4/4.0 regression] ICE on invalid template declaration

[reichelt at gcc dot gnu dot org]

The following invalid code snippet causes an ICE since gcc 3.3
(it also crashes gcc 2.95.x, 3.0.x, but doesn't crash gcc 3.1.x, 3.2.x):

=======================================
template<typename T> struct T::A {};
=======================================

Mainline issues the following error message:

bug.cc:5: internal compiler error: in is_ancestor, at cp/name-lookup.c:2185
Please submit a full bug report, [etc.]

-- 
           Summary: [3.3/3.4/4.0 regression] ICE on invalid template
                    declaration
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Keywords: ice-on-invalid-code, monitored
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: reichelt at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18731