diff --git a/server/robotserver/coroutine.cc b/server/robotserver/coroutine.cc
index 25d70737..d510fd99 100644
--- a/server/robotserver/coroutine.cc
+++ b/server/robotserver/coroutine.cc
@@ -30,6 +30,11 @@ Coroutine::Coroutine(std::function<void(Coroutine*)> cb)
              CallEnter(sink);
              cb_(this);
              CallExit(sink);
+             for (auto notifyer : notifyers_) {
+                 if (!notifyer.expired()) {
+                     //notifyer.lock()->
+                 }
+             }
          });
 }