The following code snippet triggers an ICE on mainline: =========================================== struct A {};
template<typename... T> struct B : T... { B() : T()... {} }; B<A> b; =========================================== bug.cc: In constructor 'B<T>::B() [with T = A]': bug.cc:8: instantiated from here bug.cc:5: internal compiler error: tree check: expected tree_list, have void_type in tsubst_initializer_list, at cp/pt.c:14981 Please submit a full bug report, [etc.] I guess, the code is invalid, but I'm not sure. -- Summary: [4.3 regression] ICE derived classes and variadic templates Product: gcc Version: 4.3.0 Status: UNCONFIRMED Keywords: ice-on-invalid-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=34050