From 29ced9642d63df956f07904011b19e4b272091d4 Mon Sep 17 00:00:00 2001
From: jobobby04 <jobobby04@users.noreply.github.com>
Date: Sat, 25 Jun 2022 11:09:41 -0400
Subject: [PATCH] Fix downloader crash related to UnmeteredSource (#7365)

Fix crash when starting a download with chaqpters from a UnmeteredSource

(cherry picked from commit 470a5764417ccd63a274ccea0e483a12ec1adbda)
---
 .../main/java/eu/kanade/tachiyomi/data/download/Downloader.kt  | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/download/Downloader.kt b/app/src/main/java/eu/kanade/tachiyomi/data/download/Downloader.kt
index e2f84f646..732a1c2bc 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/download/Downloader.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/download/Downloader.kt
@@ -278,7 +278,8 @@ class Downloader(
                 val maxDownloadsFromSource = queue
                     .groupBy { it.source }
                     .filterKeys { it !is UnmeteredSource }
-                    .maxOf { it.value.size }
+                    .maxOfOrNull { it.value.size }
+                    ?: 0
                 if (
                     queuedDownloads > DOWNLOADS_QUEUED_WARNING_THRESHOLD ||
                     maxDownloadsFromSource > CHAPTERS_PER_SOURCE_QUEUE_WARNING_THRESHOLD