Fix https://github.com/matthieugrieger/mumbledj/issues/172: Index out of range error during skip

CHANGELOG.md

@@ -1,6 +1,9 @@
 MumbleDJ Changelog
 ==================
 
+### August 14, 2016 -- `v3.1.2`
+* Fixed an index out of range crash in the queue skipping function.
+
 ### July 11, 2016 -- `v3.1.1`
 * Updated vendored dependencies to hopefully address the following issue: https://github.com/matthieugrieger/mumbledj/issues/169.
 

bot/queue.go

@@ -199,7 +199,7 @@ func (q *Queue) Skip() {
 
 	q.mutex.Lock()
 	// If caching is disabled, delete the track from disk.
-	if !viper.GetBool("cache.enabled") {
+	if q.Length() != 0 && !viper.GetBool("cache.enabled") {
 		DJ.YouTubeDL.Delete(q.Queue[0])
 	}
 

main.go

@@ -32,7 +32,7 @@ func init() {
 	services.DJ = DJ
 	bot.DJ = DJ
 
-	DJ.Version = "v3.1.1"
+	DJ.Version = "v3.1.2"
 
 	logrus.SetLevel(logrus.WarnLevel)
 }