The following invalid code snippet triggers an ICE on mainline:
=====================================================================
template<typename...> struct A;
template<typename...T> struct A<T*>
{
void foo();
};
template<typename...T> void A<T*>::foo() {}
=====================================================================
bug.cc:3: error: parameter packs not expanded with `...':
bug.cc:3: note: 'T'
bug.cc:3: error: template parameters not used in partial specialization:
bug.cc:3: error: 'T'
bug.cc:8: internal compiler error: same canonical type node for different types
<typeprefixerror>* and T*
Please submit a full bug report, [etc.]
--
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=34055
