The following invalid code snippet triggers an ICE on mainline:
===========================================================
template<template<int> class ...T> struct A : T<0> {};
===========================================================
bug.cc:1: error: parameter packs not expanded with `...':
bug.cc:1: note: 'template<int <anonymous> > class T'
bug.cc:1: internal compiler error: tree check: expected template_type_parm or
template_template_parm or bound_template_template_parm, have error_mark in
current_template_args, at cp/pt.c:3186
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 template-template parameters
and inheritance
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=34061
