message: Fix on_error_complete
diff: @@ -24,8 +24,8 @@ public:
  }
  template <class Next, class... Steps>
  - void on_error(Next& next, Steps&... steps) {
  - next.on_error(steps...);
  + void on_complete(Next& next, Steps&... steps) {
  + next.on_complete(steps...);
  }
  template <class Next, class... Steps>
  