fix for tinode#583

sayi21cn · Dec 17, 2020 · ffac631 · ffac631
1 parent 1ab545c
commit ffac631
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/server/topic.go b/server/topic.go
@@ -1482,7 +1482,7 @@ func (t *Topic) thisUserSub(h *Hub, sess *Session, pkt *ClientComMessage, asUid
 		t.notifySubChange(asUid, asUid, asChan, oldWant, oldGiven, userData.modeWant, userData.modeGiven, sess.sid)
 	}
 
-	if pkt.Sub.Newsub || oldWant != userData.modeWant || oldGiven != userData.modeGiven {
+	if (pkt.Sub != nil && pkt.Sub.Newsub) || oldWant != userData.modeWant || oldGiven != userData.modeGiven {
 		modeChanged = &MsgAccessMode{
 			Want:  userData.modeWant.String(),
 			Given: userData.modeGiven.String(),