1 // { dg-do compile { target c++11 } }
2 template<typename...> struct list {};
3 
4 template<typename Sequence, typename Head>
5 struct push_front;
6 
7 template<typename... Elements, typename Head>
8 struct push_front<list<Elements...>, Head> {
9   typedef list<Head, Elements> type; // { dg-error "parameter packs not expanded" }
10 };
11 
12 // { dg-message "Elements" "note" { target *-*-* } 9 }
13