From 6778ca11c94a81d51b75d07bde3dea68ada49948 Mon Sep 17 00:00:00 2001
From: Sungmin Chris Yang <ysm0622@gmail.com>
Date: Thu, 18 Feb 2021 02:08:14 +0900
Subject: [PATCH] fix: sometimes subtitlesTrack_.cues is null (#1073)

---
 src/vtt-segment-loader.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/vtt-segment-loader.js b/src/vtt-segment-loader.js
index 5097999bd..d1db6c440 100644
--- a/src/vtt-segment-loader.js
+++ b/src/vtt-segment-loader.js
@@ -54,7 +54,7 @@ export default class VTTSegmentLoader extends SegmentLoader {
    *         TimeRange object representing the current buffered ranges
    */
   buffered_() {
-    if (!this.subtitlesTrack_ || !this.subtitlesTrack_.cues.length) {
+    if (!this.subtitlesTrack_ || !this.subtitlesTrack_.cues || !this.subtitlesTrack_.cues.length) {
       return videojs.createTimeRanges();
     }