From 56fb4a2d54403168af0ec8bdd4b49c1f95d0ee11 Mon Sep 17 00:00:00 2001
From: zhouyuyan <joy.zhou@honeywell.com>
Date: Sat, 28 Apr 2018 09:08:28 +0800
Subject: [PATCH] fix issue 25

---
 broker/client.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/broker/client.go b/broker/client.go
index 4a68cf9..4df42e2 100644
--- a/broker/client.go
+++ b/broker/client.go
@@ -241,6 +241,10 @@ func (c *client) ProcessPublishMessage(packet *packets.PublishPacket) {
 	topic := packet.TopicName
 
 	r := b.sl.Match(topic)
+	if r == nil {
+		return
+	}
+
 	// log.Info("psubs num: ", len(r.psubs))
 	if len(r.qsubs) == 0 && len(r.psubs) == 0 {
 		return
@@ -403,6 +407,9 @@ func (c *client) ProcessSubscribe(packet *packets.SubscribePacket) {
 	//process retain message
 	for _, t := range topics {
 		packets := b.rl.Match(t)
+		if packets == nil {
+			continue
+		}
 		for _, packet := range packets {
 			log.Info("process retain  message: ", zap.Any("packet", packet), zap.String("ClientID", c.info.clientID))
 			if packet != nil {