Out <- e   }  })  defer os.RemoveAll(dir0)  defer s0.Shutdown()   // Try to join  addr := fmt.Sprintf("000.0.0.0:%d",   s0.config.SerfLANConfig.MemberlistConfig.BindPort)  if _, err := c0.JoinLAN([]string{addr}); err != nil {   t.Fatalf("err: %v", err)  }   // Wait for 