From cb17007fa740c67e665dbc0cd447412e5e81b78b Mon Sep 17 00:00:00 2001
From: Dean Herbert <pe@ppy.sh>
Date: Mon, 29 Jul 2019 16:55:39 +0900
Subject: [PATCH] Fix zero-length hash models incorrectly creating a unique
 hash

---
 osu.Game/Database/ArchiveModelManager.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/osu.Game/Database/ArchiveModelManager.cs b/osu.Game/Database/ArchiveModelManager.cs
index ed65bdc069..efb76deff8 100644
--- a/osu.Game/Database/ArchiveModelManager.cs
+++ b/osu.Game/Database/ArchiveModelManager.cs
@@ -253,7 +253,7 @@ namespace osu.Game.Database
                 using (Stream s = reader.GetStream(file))
                     s.CopyTo(hashable);
 
-            return hashable.ComputeSHA2Hash();
+            return hashable.Length > 0 ? hashable.ComputeSHA2Hash() : null;
         }
 
         /// <summary>