The following invalid code snippet triggers an ICE on mainline:
==================================================================
template<typename...> struct A;
template<typename...T, typename...U> struct A<A<T...,U...> > {};
A<A<int,int> > b;
==================================================================
bug.cc:5: internal compiler error: in unify, at cp/pt.c:13178
Please submit a full bug report, [etc.]
The testcase was derived from Chris Fairles' testcase from comment #1
in PR 32128.
--
Summary: [4.3 regression] ICE with invalid specialization of
variadic template
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=34069
