From 84daba377150e3ea7c29bdfe72f103f3f29ddeb4 Mon Sep 17 00:00:00 2001
From: tzugen <tzugen@riseup.net>
Date: Thu, 10 Nov 2022 11:44:08 +0100
Subject: [PATCH] Fix one crash

---
 .../kotlin/org/moire/ultrasonic/service/DownloadService.kt    | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/ultrasonic/src/main/kotlin/org/moire/ultrasonic/service/DownloadService.kt b/ultrasonic/src/main/kotlin/org/moire/ultrasonic/service/DownloadService.kt
index d714720f..8899f382 100644
--- a/ultrasonic/src/main/kotlin/org/moire/ultrasonic/service/DownloadService.kt
+++ b/ultrasonic/src/main/kotlin/org/moire/ultrasonic/service/DownloadService.kt
@@ -136,7 +136,9 @@ class DownloadService : Service(), KoinComponent {
 
         // Fill up active List with waiting tasks
         while (activelyDownloading.size < Settings.parallelDownloads && downloadQueue.size > 0) {
-            val track = downloadQueue.remove()
+            // Use poll() instead of remove() which throws an Exception if there is no element.
+            val track: DownloadableTrack = downloadQueue.poll() ?: continue
+
             val downloadTask = DownloadTask(track, scope!!, ::downloadStateChangedCallback)
             activelyDownloading[track] = downloadTask
             FileUtil.createDirectoryForParent(track.pinnedFile)