1 // PR c++/53858
2 // { dg-do compile { target c++11 } }
3 
4 template <typename T>  struct s0 { typedef  T  tdef0; };
5 template <typename T>  struct s1 { typedef  T  tdef1; };
6 template <typename T>  using us1 = typename s1<T>::tdef1;
7 template <typename  T, typename  TT = typename  us1<T>::tdef0>  struct s2 {};
8 
main()9 int main () { return 0; }
10