From 065fbc0428b31755dbb97d684ccb31759b805ea1 Mon Sep 17 00:00:00 2001
From: itsmattkc <itsmattkc@gmail.com>
Date: Tue, 19 Nov 2019 22:14:43 +0900
Subject: [PATCH] return nullptr if a TrackReference references a track that
 doesn't exist

Fixes assert trying to access an array location that doesn't exist.
---
 app/node/output/timeline/tracklist.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/app/node/output/timeline/tracklist.cpp b/app/node/output/timeline/tracklist.cpp
index b31be3cf2..51e0d06fa 100644
--- a/app/node/output/timeline/tracklist.cpp
+++ b/app/node/output/timeline/tracklist.cpp
@@ -108,6 +108,10 @@ const QVector<TrackOutput *> &TrackList::Tracks()
 
 TrackOutput *TrackList::TrackAt(int index)
 {
+  if (index < 0 || index >= track_cache_.size()) {
+    return nullptr;
+  }
+
   return track_cache_.at(index);
 }