[Bug c++/34751] New: [4.3 regression] ICE with pointer to member and variadic templates

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

The following (IMHO valid) code snippet triggers an ICE on mainline:

================================================================
struct A {};

template<int, typename T = A, int T::*...p = 0 > struct B {};

B<0> b;
================================================================

bug.cc:5: internal compiler error: tree check: accessed elt 2 of tree_vec with
1 elts in tsubst, at cp/pt.c:8934
Please submit a full bug report, [etc.]

A similar testcase just segfaults:

================================================================
struct A {};

template<typename T = A, int T::*...p = 0 > struct B {};

B<> b;
================================================================

bug.cc:5: internal compiler error: Segmentation fault
Please submit a full bug report, [etc.]

The ICE appeared between 2007-10-13 and 2007-11-13.


-- 
           Summary: [4.3 regression] ICE with pointer to member and variadic
                    templates
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-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=34751