template <typename T>
struct A;
template <typename T>
struct C;
template <typename T>
struct B
{
  typedef C<T> type;
};
template <typename T>
struct C
{
  C()
  {
    /* clang-format off */
    static_cast<void>(sizeof(typename B< A<T> >::type));
    /* clang-format on */
  }
};
C<void> start;