From 7b0fad6461342948385a75166d68df24b175d18c Mon Sep 17 00:00:00 2001
From: Dean Herbert <pe@ppy.sh>
Date: Thu, 16 Jun 2022 23:29:33 +0900
Subject: [PATCH] Null disposal token after use

---
 osu.Game/Database/EFToRealmMigrator.cs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/osu.Game/Database/EFToRealmMigrator.cs b/osu.Game/Database/EFToRealmMigrator.cs
index d2f52fa635..aa25c76943 100644
--- a/osu.Game/Database/EFToRealmMigrator.cs
+++ b/osu.Game/Database/EFToRealmMigrator.cs
@@ -133,6 +133,8 @@ namespace osu.Game.Database
             Task.Factory.StartNew(() =>
             {
                 realm.CreateBackup(Path.Combine(backup_folder, $"client.{backupSuffix}.realm"), realmBlockOperations);
+                realmBlockOperations = null;
+
                 efContextFactory.CreateBackup(Path.Combine(backup_folder, $"client.{backupSuffix}.db"));
 
                 using (var ef = efContextFactory.Get())
@@ -218,7 +220,7 @@ namespace osu.Game.Database
                 // If we were to not do this, the migration would run another time the next time the user starts the game.
                 deletePreRealmData();
 
-                realmBlockOperations.Dispose();
+                realmBlockOperations?.Dispose();
 
                 migrationCompleted.SetResult(true);
                 efContextFactory.SetMigrationCompletion();