The following invalid code snippet triggers an ICE on mainline:
=======================================================
template<typename...> struct A;
template<typename T, typename... U> struct A<T, U>
{
template<typename> struct B;
template<typename X> struct B<X*> {};
};
=======================================================
bug.cc:3: error: parameter packs not expanded with `...':
bug.cc:3: note: 'U'
bug.cc:7: internal compiler error: tree check: expected class 'type', have
'exceptional' (error_mark) in template_class_depth, at cp/pt.c:312
Please submit a full bug report, [etc.]
The bug appeared between 2007-10-13 and 2007-11-13.
--
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=34606
