From 78d14c78d2da38c04350befc8666953397133c2c Mon Sep 17 00:00:00 2001
From: Matt Joiner <anacrolix@gmail.com>
Date: Tue, 19 May 2020 12:44:42 +1000
Subject: [PATCH] Fix panic caused by adding disabled udp trackers

---
 torrent.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/torrent.go b/torrent.go
index 0a8cfe4b..927b25fd 100644
--- a/torrent.go
+++ b/torrent.go
@@ -1386,6 +1386,9 @@ func (t *Torrent) startScrapingTracker(_url string) {
 		go newAnnouncer.Run()
 		return newAnnouncer
 	}()
+	if sl == nil {
+		return
+	}
 	if t.trackerAnnouncers == nil {
 		t.trackerAnnouncers = make(map[string]torrentTrackerAnnouncer)
 	}
-- 
2.51.0