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
