From c04550fe1504833da79d9928298a8d256a50f332 Mon Sep 17 00:00:00 2001
From: jmir1 <43830312+jmir1@users.noreply.github.com>
Date: Sun, 31 Oct 2021 19:25:32 +0100
Subject: [PATCH] Fix crash when updating library whithout manga to update
 (#6181)

(cherry picked from commit 27542bc81d24e08f077af5996dc354bfefac76f5)
---
 .../eu/kanade/tachiyomi/data/library/LibraryUpdateService.kt    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/library/LibraryUpdateService.kt b/app/src/main/java/eu/kanade/tachiyomi/data/library/LibraryUpdateService.kt
index 938ea985a..12059adfa 100755
--- a/app/src/main/java/eu/kanade/tachiyomi/data/library/LibraryUpdateService.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/library/LibraryUpdateService.kt
@@ -347,7 +347,7 @@ class LibraryUpdateService(
             .sortedWith(rankingScheme[selectedScheme])
 
         // Warn when excessively checking a single source
-        val maxUpdatesFromSource = mangaToUpdate.groupBy { it.source }.maxOf { it.value.size }
+        val maxUpdatesFromSource = mangaToUpdate.groupBy { it.source }.maxOfOrNull { it.value.size } ?: 0
         if (maxUpdatesFromSource > MANGA_PER_SOURCE_QUEUE_WARNING_THRESHOLD) {
             toast(R.string.notification_size_warning, Toast.LENGTH_LONG)
         }