From 14c72f85fa56387b3932908c616c0de68e3aee36 Mon Sep 17 00:00:00 2001
From: iiSaLMaN <slmanarendo1950@gmail.com>
Date: Tue, 15 Oct 2019 23:40:48 +0300
Subject: [PATCH] Fix incorrect beatmap set info equality check on non-online
 set info

---
 osu.Game/Beatmaps/BeatmapSetInfo.cs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/osu.Game/Beatmaps/BeatmapSetInfo.cs b/osu.Game/Beatmaps/BeatmapSetInfo.cs
index 03bc7c7312..90346a8c8b 100644
--- a/osu.Game/Beatmaps/BeatmapSetInfo.cs
+++ b/osu.Game/Beatmaps/BeatmapSetInfo.cs
@@ -63,6 +63,12 @@ public int? OnlineBeatmapSetID
 
         public bool Protected { get; set; }
 
-        public bool Equals(BeatmapSetInfo other) => OnlineBeatmapSetID == other?.OnlineBeatmapSetID;
+        public bool Equals(BeatmapSetInfo other)
+        {
+            if (!OnlineBeatmapSetID.HasValue || !(other?.OnlineBeatmapSetID.HasValue ?? false))
+                return ReferenceEquals(this, other);
+
+            return OnlineBeatmapSetID == other.OnlineBeatmapSetID;
+        }
     }
 }