From debeaa181cffd6f458a157f8358d0ab07de77b14 Mon Sep 17 00:00:00 2001
From: Veikko Sariola <veikko.sariola@gmail.com>
Date: Mon, 26 Oct 2020 12:48:33 +0200
Subject: [PATCH] Fix bug in song.go: len(s.Patterns) should have been
 len(s.Tracks).

---
 song/song.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/song/song.go b/song/song.go
index eeb76e6..a44d335 100644
--- a/song/song.go
+++ b/song/song.go
@@ -42,7 +42,7 @@ func (s *Song) Validate() error {
 			return errors.New("Every pattern should have the same length")
 		}
 	}
-	for i := range s.Tracks[:len(s.Patterns)-1] {
+	for i := range s.Tracks[:len(s.Tracks)-1] {
 		if len(s.Tracks[i].Sequence) != len(s.Tracks[i+1].Sequence) {
 			return errors.New("Every track should have the same sequence length")
 		}