message: Update threaded_queue.h
diff: @@ -36,8 +36,7 @@ private:
  }
  template <size_t... Is> void unlock_impl(std::index_sequence<Is...>) {
  - (void)std::initializer_list<int>{
  - (std::get<Is>(tuple_)->mutex_.unlock(), 0)...};
  + (std::get<Is>(tuple_)->mutex_.unlock(), ...);
  }
  std::tuple<Queue...> tuple_;
  