The following invalid code snippet triggers an ICE on mainline:
==================================================
template<int> struct A
{
template<typename...> struct B {};
template<typename...T> struct B<int,T*> {};
};
A<0>::B<int> b;
==================================================
bug.cc:5: error: parameter packs not expanded with `...':
bug.cc:5: note: 'T'
bug.cc:5: error: template parameters not used in partial specialization:
bug.cc:5: error: 'T'
bug.cc:8: internal compiler error: tree check: expected tree_vec, have
error_mark in get_innermost_template_args, at cp/pt.c:514
Please submit a full bug report, [etc.]
The testcase didn't crash before 2007-11-03, so it's probably fallout from
http://gcc.gnu.org/ml/gcc-cvs/2007-11/msg00120.html
--
Summary: [4.3 regression] ICE with invalid specialization of
variadic template
Product: gcc
Version: 4.3.0
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=34060
