fix for https://github.com/Bytom/vapor/pull/374#discussion_r318683697

diff --git a/toolbar/precog/monitor/monitor.go b/toolbar/precog/monitor/monitor.go
index 581bb20..498dcc6 100644 (file)
--- a/toolbar/precog/monitor/monitor.go
+++ b/toolbar/precog/monitor/monitor.go
@@ -121,12 +121,11 @@ func (m *monitor) makeSwitch() error {
 
        // no need for lanDiscv, but passing &mdns.LANDiscover{} will cause NilPointer
        lanDiscv := mdns.NewLANDiscover(mdns.NewProtocol(), int(l.ExternalAddress().Port))
-       sw, err := p2p.NewSwitch(m.nodeCfg, discv, lanDiscv, l, m.privKey, listenAddr, m.cfg.NetworkID)
+       m.sw, err = p2p.NewSwitch(m.nodeCfg, discv, lanDiscv, l, m.privKey, listenAddr, m.cfg.NetworkID)
        if err != nil {
                return err
        }
 
-       m.sw = sw
        return nil
 }