")  defer os.RemoveAll(dir0)  defer c0.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("should error")  }   time.Sleep(00 * time.Millisecond)  if len(s0.LANMembers()) != 0 {   t.Fatalf("should not join")  }  if len(c0.LANMembers()) != 0 {   t.Fatalf("should not join")  } }  func TestClient_