Fix newSidecar function return value

internal/peermgr/swarm.go

@@ -160,6 +160,7 @@ func (swarm *Swarm) Start() error {
 				"node":     remoteID,
 				"address:": address,
 			}).Info("Connect successfully")
+			{
 				//swarm.lock.RLock()
 				//defer swarm.lock.RUnlock()
 				//for _, handler := range swarm.connectHandlers {
@@ -167,6 +168,7 @@ func (swarm *Swarm) Start() error {
 				//		connectHandler(address)
 				//	}(handler, address)
 				//}
+			}
 			wg.Done()
 		}(id, addr)
 	}
@@ -198,7 +200,6 @@ func (swarm *Swarm) handleMessage(s network.Stream, data []byte) {
 	}
 	msgHandlerPort, ok := handler.(MessageHandlerPort)
 	if ok {
-
 		msgHandlerPort(func() port.Port { return swarm.newSidecar(s.RemotePeerID()) }, m)
 		return
 	}
@@ -212,6 +213,7 @@ func (swarm *Swarm) newSidecar(sidecarID string) *sidecar {
 	info, err := swarm.getRemotePeerInfo(sidecarID)
 	if err != nil {
 		swarm.logger.Error(err)
+		return nil
 	}
 	p := newSidecar(sidecarID, info.GetTag(), swarm)
 	return p
@@ -228,9 +230,6 @@ func (swarm *Swarm) handleIBTPX(fn func() port.Port, m *pb.Message) {
 			ps.Receive(m)
 		}
 	} else {
-		//ppt := pt.(*sidecar)
-		//swarm.addRemotePort(ppt)
-		//ppt.Receive(m)
 		swarm.logger.WithFields(logrus.Fields{
 			"remote port": pt.ID(),
 			"func":        "Swarm.handleIBTPX",