Merge branch 'master' into no-dismiss-all-progress-notifications

osu.Android.props

@@ -11,7 +11,7 @@
     <AndroidManifestMerger>manifestmerger.jar</AndroidManifestMerger>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="ppy.osu.Framework.Android" Version="2023.625.0" />
+    <PackageReference Include="ppy.osu.Framework.Android" Version="2023.707.0" />
   </ItemGroup>
   <ItemGroup>
     <AndroidManifestOverlay Include="$(MSBuildThisFileDirectory)osu.Android\Properties\AndroidManifestOverlay.xml" />

osu.Desktop/DiscordRichPresence.cs

@@ -187,7 +187,7 @@ namespace osu.Desktop
                     return edit.BeatmapInfo.ToString() ?? string.Empty;
 
                 case UserActivity.WatchingReplay watching:
-                    return watching.BeatmapInfo.ToString();
+                    return watching.BeatmapInfo?.ToString() ?? string.Empty;
 
                 case UserActivity.InLobby lobby:
                     return privacyMode.Value == DiscordRichPresenceMode.Limited ? string.Empty : lobby.Room.Name.Value;

osu.Desktop/OsuGameDesktop.cs

@@ -147,14 +147,12 @@ namespace osu.Desktop
         {
             base.SetHost(host);
 
-            var desktopWindow = (SDL2DesktopWindow)host.Window;
-
             var iconStream = Assembly.GetExecutingAssembly().GetManifestResourceStream(GetType(), "lazer.ico");
             if (iconStream != null)
-                desktopWindow.SetIconFromStream(iconStream);
+                host.Window.SetIconFromStream(iconStream);
 
-            desktopWindow.CursorState |= CursorState.Hidden;
+            host.Window.CursorState |= CursorState.Hidden;
-            desktopWindow.Title = Name;
+            host.Window.Title = Name;
         }
 
         protected override BatteryInfo CreateBatteryInfo() => new SDL2BatteryInfo();

osu.Game.Rulesets.Catch/Skinning/Legacy/LegacyCatchComboCounter.cs

@@ -4,6 +4,7 @@
 using osu.Framework.Graphics;
 using osu.Game.Graphics.Containers;
 using osu.Game.Rulesets.Catch.UI;
+using osu.Game.Screens.Play;
 using osu.Game.Skinning;
 using osuTK;
 using osuTK.Graphics;
@@ -59,7 +60,7 @@ namespace osu.Game.Rulesets.Catch.Skinning.Legacy
 
             lastDisplayedCombo = combo;
 
-            if (Time.Elapsed < 0)
+            if ((Clock as IGameplayClock)?.IsRewinding == true)
             {
                 // needs more work to make rewind somehow look good.
                 // basically we want the previous increment to play... or turning off RemoveCompletedTransforms (not feasible from a performance angle).

osu.Game.Rulesets.Catch/UI/CatcherArea.cs

@@ -10,6 +10,7 @@ using osu.Game.Rulesets.Catch.Objects.Drawables;
 using osu.Game.Rulesets.Catch.Replays;
 using osu.Game.Rulesets.Judgements;
 using osu.Game.Rulesets.UI;
+using osu.Game.Screens.Play;
 using osuTK;
 
 namespace osu.Game.Rulesets.Catch.UI
@@ -96,7 +97,7 @@ namespace osu.Game.Rulesets.Catch.UI
 
             comboDisplay.X = Catcher.X;
 
-            if (Time.Elapsed <= 0)
+            if ((Clock as IGameplayClock)?.IsRewinding == true)
             {
                 // This is probably a wrong value, but currently the true value is not recorded.
                 // Setting `true` will prevent generation of false-positive after-images (with more false-negatives).

osu.Game.Rulesets.Mania/Objects/Drawables/DrawableHoldNote.cs

@@ -16,6 +16,7 @@ using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Rulesets.UI.Scrolling;
+using osu.Game.Screens.Play;
 using osu.Game.Skinning;
 using osuTK;
 
@@ -298,7 +299,7 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
                 return false;
 
             // do not run any of this logic when rewinding, as it inverts order of presses/releases.
-            if (Time.Elapsed < 0)
+            if ((Clock as IGameplayClock)?.IsRewinding == true)
                 return false;
 
             if (CheckHittable?.Invoke(this, Time.Current) == false)
@@ -337,7 +338,7 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
                 return;
 
             // do not run any of this logic when rewinding, as it inverts order of presses/releases.
-            if (Time.Elapsed < 0)
+            if ((Clock as IGameplayClock)?.IsRewinding == true)
                 return;
 
             Tail.UpdateResult();

osu.Game.Rulesets.Osu/Objects/Drawables/DrawableSliderBall.cs

@@ -14,6 +14,7 @@ using osu.Framework.Input.Events;
 using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.Osu.Skinning.Default;
+using osu.Game.Screens.Play;
 using osu.Game.Skinning;
 using osuTK;
 
@@ -179,16 +180,13 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 
         private Vector2? lastPosition;
 
-        private bool rewinding;
-
         public void UpdateProgress(double completionProgress)
         {
             Position = drawableSlider.HitObject.CurvePositionAt(completionProgress);
 
             var diff = lastPosition.HasValue ? lastPosition.Value - Position : Position - drawableSlider.HitObject.CurvePositionAt(completionProgress + 0.01f);
 
-            if (Clock.ElapsedFrameTime != 0)
+            bool rewinding = (Clock as IGameplayClock)?.IsRewinding == true;
-                rewinding = Clock.ElapsedFrameTime < 0;
 
             // Ensure the value is substantially high enough to allow for Atan2 to get a valid angle.
             if (diff.LengthFast < 0.01f)

osu.Game.Rulesets.Taiko/Difficulty/TaikoPerformanceCalculator.cs

@@ -42,7 +42,7 @@ namespace osu.Game.Rulesets.Taiko.Difficulty
                 effectiveMissCount = Math.Max(1.0, 1000.0 / totalSuccessfulHits) * countMiss;
 
             // TODO: The detection of rulesets is temporary until the leftover old skills have been reworked.
-            bool isConvert = score.BeatmapInfo.Ruleset.OnlineID != 1;
+            bool isConvert = score.BeatmapInfo!.Ruleset.OnlineID != 1;
 
             double multiplier = 1.13;
 

osu.Game.Rulesets.Taiko/Skinning/Legacy/LegacyCirclePiece.cs

@@ -1,6 +1,7 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using System;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
@@ -8,6 +9,7 @@ using osu.Framework.Graphics.Animations;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Primitives;
 using osu.Game.Beatmaps;
+using osu.Game.Beatmaps.ControlPoints;
 using osu.Game.Graphics;
 using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.Taiko.Objects;
@@ -26,11 +28,12 @@ namespace osu.Game.Rulesets.Taiko.Skinning.Legacy
         private Bindable<int> currentCombo { get; } = new BindableInt();
 
         private int animationFrame;
-        private double beatLength;
 
         // required for editor blueprints (not sure why these circle pieces are zero size).
         public override Quad ScreenSpaceDrawQuad => backgroundLayer.ScreenSpaceDrawQuad;
 
+        private TimingControlPoint timingPoint = TimingControlPoint.DEFAULT;
+
         public LegacyCirclePiece()
         {
             RelativeSizeAxes = Axes.Both;
@@ -39,11 +42,8 @@ namespace osu.Game.Rulesets.Taiko.Skinning.Legacy
         [Resolved(canBeNull: true)]
         private GameplayState? gameplayState { get; set; }
 
-        [Resolved(canBeNull: true)]
-        private IBeatSyncProvider? beatSyncProvider { get; set; }
-
         [BackgroundDependencyLoader]
-        private void load(ISkinSource skin, DrawableHitObject drawableHitObject)
+        private void load(ISkinSource skin, DrawableHitObject drawableHitObject, IBeatSyncProvider? beatSyncProvider)
         {
             Drawable? getDrawableFor(string lookup)
             {
@@ -64,6 +64,11 @@ namespace osu.Game.Rulesets.Taiko.Skinning.Legacy
             if (foregroundLayer != null)
                 AddInternal(foregroundLayer);
 
+            drawableHitObject.StartTimeBindable.BindValueChanged(startTime =>
+            {
+                timingPoint = beatSyncProvider?.ControlPoints?.TimingPointAt(startTime.NewValue) ?? TimingControlPoint.DEFAULT;
+            }, true);
+
             // Animations in taiko skins are used in a custom way (>150 combo and animating in time with beat).
             // For now just stop at first frame for sanity.
             foreach (var c in InternalChildren)
@@ -115,14 +120,8 @@ namespace osu.Game.Rulesets.Taiko.Skinning.Legacy
                 return;
             }
 
-            if (beatSyncProvider?.ControlPoints != null)
+            animationFrame = Math.Abs(Time.Current - timingPoint.Time) % ((timingPoint.BeatLength * 2) / multiplier) >= timingPoint.BeatLength / multiplier ? 0 : 1;
-            {
+            animatableForegroundLayer.GotoFrame(animationFrame);
-                beatLength = beatSyncProvider.ControlPoints.TimingPointAt(Time.Current).BeatLength;
-
-                animationFrame = Time.Current % ((beatLength * 2) / multiplier) >= beatLength / multiplier ? 0 : 1;
-
-                animatableForegroundLayer.GotoFrame(animationFrame);
-            }
         }
 
         private Color4 accentColour;

osu.Game.Tests/Beatmaps/WorkingBeatmapManagerTest.cs

@@ -64,7 +64,7 @@ namespace osu.Game.Tests.Beatmaps
         [Test]
         public void TestCachedRetrievalWithFiles() => AddStep("run test", () =>
         {
-            var beatmap = Realm.Run(r => r.Find<BeatmapInfo>(importedSet.Beatmaps.First().ID).Detach());
+            var beatmap = Realm.Run(r => r.Find<BeatmapInfo>(importedSet.Beatmaps.First().ID)!.Detach());
 
             Assert.That(beatmap.BeatmapSet?.Files, Has.Count.GreaterThan(0));
 
@@ -90,7 +90,7 @@ namespace osu.Game.Tests.Beatmaps
         [Test]
         public void TestForcedRefetchRetrievalWithFiles() => AddStep("run test", () =>
         {
-            var beatmap = Realm.Run(r => r.Find<BeatmapInfo>(importedSet.Beatmaps.First().ID).Detach());
+            var beatmap = Realm.Run(r => r.Find<BeatmapInfo>(importedSet.Beatmaps.First().ID)!.Detach());
 
             Assert.That(beatmap.BeatmapSet?.Files, Has.Count.GreaterThan(0));
 
@@ -102,7 +102,7 @@ namespace osu.Game.Tests.Beatmaps
         [Test]
         public void TestSavePreservesCollections() => AddStep("run test", () =>
         {
-            var beatmap = Realm.Run(r => r.Find<BeatmapInfo>(importedSet.Beatmaps.First().ID).Detach());
+            var beatmap = Realm.Run(r => r.Find<BeatmapInfo>(importedSet.Beatmaps.First().ID)!.Detach());
 
             var working = beatmaps.GetWorkingBeatmap(beatmap);
 

osu.Game.Tests/Database/BackgroundBeatmapProcessorTests.cs

@@ -42,7 +42,7 @@ namespace osu.Game.Tests.Database
             {
                 return Realm.Run(r =>
                 {
-                    var beatmapSetInfo = r.Find<BeatmapSetInfo>(importedSet.ID);
+                    var beatmapSetInfo = r.Find<BeatmapSetInfo>(importedSet.ID)!;
                     return beatmapSetInfo.Beatmaps.All(b => b.StarRating > 0);
                 });
             });
@@ -51,7 +51,7 @@ namespace osu.Game.Tests.Database
             {
                 Realm.Write(r =>
                 {
-                    var beatmapSetInfo = r.Find<BeatmapSetInfo>(importedSet.ID);
+                    var beatmapSetInfo = r.Find<BeatmapSetInfo>(importedSet.ID)!;
                     foreach (var b in beatmapSetInfo.Beatmaps)
                         b.StarRating = -1;
                 });
@@ -66,7 +66,7 @@ namespace osu.Game.Tests.Database
             {
                 return Realm.Run(r =>
                 {
-                    var beatmapSetInfo = r.Find<BeatmapSetInfo>(importedSet.ID);
+                    var beatmapSetInfo = r.Find<BeatmapSetInfo>(importedSet.ID)!;
                     return beatmapSetInfo.Beatmaps.All(b => b.StarRating > 0);
                 });
             });
@@ -79,7 +79,7 @@ namespace osu.Game.Tests.Database
             {
                 return Realm.Run(r =>
                 {
-                    var beatmapSetInfo = r.Find<BeatmapSetInfo>(importedSet.ID);
+                    var beatmapSetInfo = r.Find<BeatmapSetInfo>(importedSet.ID)!;
                     return beatmapSetInfo.Beatmaps.All(b => b.StarRating > 0);
                 });
             });
@@ -90,7 +90,7 @@ namespace osu.Game.Tests.Database
             {
                 Realm.Write(r =>
                 {
-                    var beatmapSetInfo = r.Find<BeatmapSetInfo>(importedSet.ID);
+                    var beatmapSetInfo = r.Find<BeatmapSetInfo>(importedSet.ID)!;
                     foreach (var b in beatmapSetInfo.Beatmaps)
                         b.StarRating = -1;
                 });
@@ -107,7 +107,7 @@ namespace osu.Game.Tests.Database
             {
                 return Realm.Run(r =>
                 {
-                    var beatmapSetInfo = r.Find<BeatmapSetInfo>(importedSet.ID);
+                    var beatmapSetInfo = r.Find<BeatmapSetInfo>(importedSet.ID)!;
                     return beatmapSetInfo.Beatmaps.All(b => b.StarRating == -1);
                 });
             });
@@ -118,7 +118,7 @@ namespace osu.Game.Tests.Database
             {
                 return Realm.Run(r =>
                 {
-                    var beatmapSetInfo = r.Find<BeatmapSetInfo>(importedSet.ID);
+                    var beatmapSetInfo = r.Find<BeatmapSetInfo>(importedSet.ID)!;
                     return beatmapSetInfo.Beatmaps.All(b => b.StarRating > 0);
                 });
             });

osu.Game.Tests/Database/BeatmapImporterTests.cs

@@ -417,6 +417,60 @@ namespace osu.Game.Tests.Database
             });
         }
 
+        [Test]
+        public void TestImport_Modify_Revert()
+        {
+            RunTestWithRealmAsync(async (realm, storage) =>
+            {
+                var importer = new BeatmapImporter(storage, realm);
+                using var store = new RealmRulesetStore(realm, storage);
+
+                var imported = await LoadOszIntoStore(importer, realm.Realm);
+
+                await createScoreForBeatmap(realm.Realm, imported.Beatmaps.First());
+
+                var score = realm.Run(r => r.All<ScoreInfo>().Single());
+
+                string originalHash = imported.Beatmaps.First().Hash;
+                const string modified_hash = "new_hash";
+
+                Assert.That(imported.Beatmaps.First().Scores.Single(), Is.EqualTo(score));
+
+                Assert.That(score.BeatmapHash, Is.EqualTo(originalHash));
+                Assert.That(score.BeatmapInfo, Is.EqualTo(imported.Beatmaps.First()));
+
+                // imitate making local changes via editor
+                // ReSharper disable once MethodHasAsyncOverload
+                realm.Write(r =>
+                {
+                    BeatmapInfo beatmap = imported.Beatmaps.First();
+                    beatmap.Hash = modified_hash;
+                    beatmap.ResetOnlineInfo();
+                    beatmap.UpdateLocalScores(r);
+                });
+
+                Assert.That(!imported.Beatmaps.First().Scores.Any());
+
+                Assert.That(score.BeatmapInfo, Is.Null);
+                Assert.That(score.BeatmapHash, Is.EqualTo(originalHash));
+
+                // imitate reverting the local changes made above
+                // ReSharper disable once MethodHasAsyncOverload
+                realm.Write(r =>
+                {
+                    BeatmapInfo beatmap = imported.Beatmaps.First();
+                    beatmap.Hash = originalHash;
+                    beatmap.ResetOnlineInfo();
+                    beatmap.UpdateLocalScores(r);
+                });
+
+                Assert.That(imported.Beatmaps.First().Scores.Single(), Is.EqualTo(score));
+
+                Assert.That(score.BeatmapHash, Is.EqualTo(originalHash));
+                Assert.That(score.BeatmapInfo, Is.EqualTo(imported.Beatmaps.First()));
+            });
+        }
+
         [Test]
         public void TestImport_ThenModifyMapWithScore_ThenImport()
         {
@@ -431,19 +485,19 @@ namespace osu.Game.Tests.Database
 
                 await createScoreForBeatmap(realm.Realm, imported.Beatmaps.First());
 
+                Assert.That(imported.Beatmaps.First().Scores.Any());
+
                 // imitate making local changes via editor
                 // ReSharper disable once MethodHasAsyncOverload
-                realm.Write(_ =>
+                realm.Write(r =>
                 {
                     BeatmapInfo beatmap = imported.Beatmaps.First();
                     beatmap.Hash = "new_hash";
                     beatmap.ResetOnlineInfo();
+                    beatmap.UpdateLocalScores(r);
                 });
 
-                // for now, making changes to a beatmap doesn't remove the backlink from the score to the beatmap.
+                Assert.That(!imported.Beatmaps.First().Scores.Any());
-                // the logic of ensuring that scores match the beatmap is upheld via comparing the hash in usages (see: https://github.com/ppy/osu/pull/22539).
-                // TODO: revisit when fixing https://github.com/ppy/osu/issues/24069.
-                Assert.That(imported.Beatmaps.First().Scores.Any());
 
                 var importedSecondTime = await importer.Import(new ImportTask(temp));
 
@@ -461,6 +515,7 @@ namespace osu.Game.Tests.Database
                 Assert.That(importedFirstTimeBeatmap.Hash != importedSecondTimeBeatmap.Hash);
                 Assert.That(!importedFirstTimeBeatmap.Scores.Any());
                 Assert.That(importedSecondTimeBeatmap.Scores.Count() == 1);
+                Assert.That(importedSecondTimeBeatmap.Scores.Single().BeatmapInfo, Is.EqualTo(importedSecondTimeBeatmap));
             });
         }
 

osu.Game.Tests/Database/BeatmapImporterUpdateTests.cs

@@ -323,7 +323,7 @@ namespace osu.Game.Tests.Database
                     var beatmapInfo = s.Beatmaps.First(b => b.File?.Filename != removedFilename);
 
                     scoreTargetBeatmapHash = beatmapInfo.Hash;
-                    s.Realm.Add(new ScoreInfo(beatmapInfo, s.Realm.All<RulesetInfo>().First(), new RealmUser()));
+                    s.Realm!.Add(new ScoreInfo(beatmapInfo, s.Realm.All<RulesetInfo>().First(), new RealmUser()));
                 });
 
                 realm.Run(r => r.Refresh());
@@ -372,7 +372,7 @@ namespace osu.Game.Tests.Database
 
                     scoreTargetBeatmapHash = beatmapInfo.Hash;
 
-                    s.Realm.Add(new ScoreInfo(beatmapInfo, s.Realm.All<RulesetInfo>().First(), new RealmUser()));
+                    s.Realm!.Add(new ScoreInfo(beatmapInfo, s.Realm.All<RulesetInfo>().First(), new RealmUser()));
                 });
 
                 // locally modify beatmap
@@ -383,14 +383,14 @@ namespace osu.Game.Tests.Database
 
                     beatmapInfo.Hash = new_beatmap_hash;
                     beatmapInfo.ResetOnlineInfo();
+                    beatmapInfo.UpdateLocalScores(s.Realm!);
                 });
 
                 realm.Run(r => r.Refresh());
 
-                // for now, making changes to a beatmap doesn't remove the backlink from the score to the beatmap.
+                // making changes to a beatmap doesn't remove the score from realm, but should disassociate the beatmap.
-                // the logic of ensuring that scores match the beatmap is upheld via comparing the hash in usages (https://github.com/ppy/osu/pull/22539).
-                // TODO: revisit when fixing https://github.com/ppy/osu/issues/24069.
                 checkCount<ScoreInfo>(realm, 1);
+                Assert.That(realm.Run(r => r.All<ScoreInfo>().First().BeatmapInfo), Is.Null);
 
                 // reimport the original beatmap before local modifications
                 var importAfterUpdate = await importer.ImportAsUpdate(new ProgressNotification(), new ImportTask(pathOnlineCopy), importBeforeUpdate.Value);
@@ -435,7 +435,7 @@ namespace osu.Game.Tests.Database
                 {
                     var beatmapInfo = s.Beatmaps.Last();
                     scoreTargetFilename = beatmapInfo.File?.Filename;
-                    s.Realm.Add(new ScoreInfo(beatmapInfo, s.Realm.All<RulesetInfo>().First(), new RealmUser()));
+                    s.Realm!.Add(new ScoreInfo(beatmapInfo, s.Realm.All<RulesetInfo>().First(), new RealmUser()));
                 });
 
                 realm.Run(r => r.Refresh());
@@ -528,7 +528,7 @@ namespace osu.Game.Tests.Database
 
                 importBeforeUpdate.PerformWrite(s =>
                 {
-                    var beatmapCollection = s.Realm.Add(new BeatmapCollection("test collection"));
+                    var beatmapCollection = s.Realm!.Add(new BeatmapCollection("test collection"));
                     beatmapsToAddToCollection = s.Beatmaps.Count - (allOriginalBeatmapsInCollection ? 0 : 1);
 
                     for (int i = 0; i < beatmapsToAddToCollection; i++)
@@ -543,7 +543,7 @@ namespace osu.Game.Tests.Database
 
                 importAfterUpdate.PerformRead(updated =>
                 {
-                    updated.Realm.Refresh();
+                    updated.Realm!.Refresh();
 
                     string[] hashes = updated.Realm.All<BeatmapCollection>().Single().BeatmapMD5Hashes.ToArray();
 
@@ -593,7 +593,7 @@ namespace osu.Game.Tests.Database
 
                 importBeforeUpdate.PerformWrite(s =>
                 {
-                    var beatmapCollection = s.Realm.Add(new BeatmapCollection("test collection"));
+                    var beatmapCollection = s.Realm!.Add(new BeatmapCollection("test collection"));
                     originalHash = s.Beatmaps.Single(b => b.DifficultyName == "Hard").MD5Hash;
 
                     beatmapCollection.BeatmapMD5Hashes.Add(originalHash);
@@ -607,7 +607,7 @@ namespace osu.Game.Tests.Database
 
                 importAfterUpdate.PerformRead(updated =>
                 {
-                    updated.Realm.Refresh();
+                    updated.Realm!.Refresh();
 
                     string[] hashes = updated.Realm.All<BeatmapCollection>().Single().BeatmapMD5Hashes.ToArray();
                     string updatedHash = updated.Beatmaps.Single(b => b.DifficultyName == "Hard").MD5Hash;

osu.Game.Tests/Database/GeneralUsageTests.cs

@@ -128,7 +128,7 @@ namespace osu.Game.Tests.Database
 
                 realm.RegisterCustomSubscription(r =>
                 {
-                    var subscription = r.All<BeatmapInfo>().QueryAsyncWithNotifications((_, _, _) =>
+                    var subscription = r.All<BeatmapInfo>().QueryAsyncWithNotifications((_, _) =>
                     {
                         realm.Run(_ =>
                         {

osu.Game.Tests/Database/RealmLiveTests.cs

@@ -355,7 +355,7 @@ namespace osu.Game.Tests.Database
                     return null;
                 });
 
-                void gotChange(IRealmCollection<BeatmapInfo> sender, ChangeSet changes, Exception error)
+                void gotChange(IRealmCollection<BeatmapInfo> sender, ChangeSet? changes)
                 {
                     changesTriggered++;
                 }

osu.Game.Tests/Database/RealmSubscriptionRegistrationTests.cs

@@ -1,7 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading;
@@ -54,7 +53,7 @@ namespace osu.Game.Tests.Database
                 registration.Dispose();
             });
 
-            void onChanged(IRealmCollection<BeatmapSetInfo> sender, ChangeSet? changes, Exception error)
+            void onChanged(IRealmCollection<BeatmapSetInfo> sender, ChangeSet? changes)
             {
                 lastChanges = changes;
 
@@ -92,7 +91,7 @@ namespace osu.Game.Tests.Database
                 registration.Dispose();
             });
 
-            void onChanged(IRealmCollection<BeatmapSetInfo> sender, ChangeSet? changes, Exception error) => lastChanges = changes;
+            void onChanged(IRealmCollection<BeatmapSetInfo> sender, ChangeSet? changes) => lastChanges = changes;
         }
 
         [Test]
@@ -185,7 +184,7 @@ namespace osu.Game.Tests.Database
                 }
             });
 
-            void onChanged(IRealmCollection<BeatmapSetInfo> sender, ChangeSet? changes, Exception error)
+            void onChanged(IRealmCollection<BeatmapSetInfo> sender, ChangeSet? changes)
             {
                 if (changes == null)
                     resolvedItems = sender;

osu.Game.Tests/Database/RulesetStoreTests.cs

@@ -76,12 +76,12 @@ namespace osu.Game.Tests.Database
                     Available = true,
                 }));
 
-                Assert.That(realm.Run(r => r.Find<RulesetInfo>(rulesetShortName).Available), Is.True);
+                Assert.That(realm.Run(r => r.Find<RulesetInfo>(rulesetShortName)!.Available), Is.True);
 
                 // Availability is updated on construction of a RealmRulesetStore
                 var _ = new RealmRulesetStore(realm, storage);
 
-                Assert.That(realm.Run(r => r.Find<RulesetInfo>(rulesetShortName).Available), Is.False);
+                Assert.That(realm.Run(r => r.Find<RulesetInfo>(rulesetShortName)!.Available), Is.False);
             });
         }
 
@@ -101,18 +101,18 @@ namespace osu.Game.Tests.Database
                     Available = true,
                 }));
 
-                Assert.That(realm.Run(r => r.Find<RulesetInfo>(rulesetShortName).Available), Is.True);
+                Assert.That(realm.Run(r => r.Find<RulesetInfo>(rulesetShortName)!.Available), Is.True);
 
                 // Availability is updated on construction of a RealmRulesetStore
                 var _ = new RealmRulesetStore(realm, storage);
 
-                Assert.That(realm.Run(r => r.Find<RulesetInfo>(rulesetShortName).Available), Is.False);
+                Assert.That(realm.Run(r => r.Find<RulesetInfo>(rulesetShortName)!.Available), Is.False);
 
                 // Simulate the ruleset getting updated
                 LoadTestRuleset.Version = Ruleset.CURRENT_RULESET_API_VERSION;
                 var __ = new RealmRulesetStore(realm, storage);
 
-                Assert.That(realm.Run(r => r.Find<RulesetInfo>(rulesetShortName).Available), Is.True);
+                Assert.That(realm.Run(r => r.Find<RulesetInfo>(rulesetShortName)!.Available), Is.True);
             });
         }
 

osu.Game.Tests/Database/TestRealmKeyBindingStore.cs

@@ -104,7 +104,7 @@ namespace osu.Game.Tests.Database
 
                 realm.Run(innerRealm =>
                 {
-                    var binding = innerRealm.ResolveReference(tsr);
+                    var binding = innerRealm.ResolveReference(tsr)!;
                     innerRealm.Write(() => binding.KeyCombination = new KeyCombination(InputKey.BackSpace));
                 });
 

osu.Game.Tests/Models/DisplayStringTest.cs

@@ -87,10 +87,10 @@ namespace osu.Game.Tests.Models
             var mock = new Mock<IScoreInfo>();
 
             mock.Setup(m => m.User).Returns(new APIUser { Username = "user" }); // TODO: temporary.
-            mock.Setup(m => m.Beatmap.Metadata.Artist).Returns("artist");
+            mock.Setup(m => m.Beatmap!.Metadata.Artist).Returns("artist");
-            mock.Setup(m => m.Beatmap.Metadata.Title).Returns("title");
+            mock.Setup(m => m.Beatmap!.Metadata.Title).Returns("title");
-            mock.Setup(m => m.Beatmap.Metadata.Author.Username).Returns("author");
+            mock.Setup(m => m.Beatmap!.Metadata.Author.Username).Returns("author");
-            mock.Setup(m => m.Beatmap.DifficultyName).Returns("difficulty");
+            mock.Setup(m => m.Beatmap!.DifficultyName).Returns("difficulty");
 
             Assert.That(mock.Object.GetDisplayString(), Is.EqualTo("user playing artist - title (author) [difficulty]"));
         }

osu.Game.Tests/Visual/Gameplay/TestSceneClicksPerSecondCalculator.cs

@@ -125,6 +125,7 @@ namespace osu.Game.Tests.Visual.Gameplay
 
             public IEnumerable<double> NonGameplayAdjustments => throw new NotImplementedException();
             public IBindable<bool> IsPaused => throw new NotImplementedException();
+            public bool IsRewinding => false;
         }
     }
 }

osu.Game.Tests/Visual/Gameplay/TestSceneGameplaySampleTriggerSource.cs

@@ -107,7 +107,7 @@ namespace osu.Game.Tests.Visual.Gameplay
         {
             base.SetUpSteps();
 
-            AddStep("Add trigger source", () => Player.GameplayClockContainer.Add(sampleTriggerSource = new TestGameplaySampleTriggerSource(Player.DrawableRuleset.Playfield.HitObjectContainer)));
+            AddStep("Add trigger source", () => Player.DrawableRuleset.FrameStableComponents.Add(sampleTriggerSource = new TestGameplaySampleTriggerSource(Player.DrawableRuleset.Playfield.HitObjectContainer)));
         }
 
         [Test]
@@ -153,6 +153,14 @@ namespace osu.Game.Tests.Visual.Gameplay
             waitForAliveObjectIndex(2);
             checkValidObjectIndex(2);
 
+            // test rewinding
+            seekBeforeIndex(1);
+            waitForAliveObjectIndex(1);
+            checkValidObjectIndex(1);
+
+            seekBeforeIndex(1, 400);
+            checkValidObjectIndex(0);
+
             seekBeforeIndex(3);
             waitForAliveObjectIndex(3);
             checkValidObjectIndex(3);

osu.Game.Tests/Visual/Gameplay/TestScenePlayerLocalScoreImport.cs

@@ -131,7 +131,7 @@ namespace osu.Game.Tests.Visual.Gameplay
             AddAssert("results screen score has matching", () => (Player.GetChildScreen() as ResultsScreen)?.Score.Mods.First(), () => Is.EqualTo(playerMods.First()));
 
             AddUntilStep("score in database", () => Realm.Run(r => r.Find<ScoreInfo>(Player.Score.ScoreInfo.ID) != null));
-            AddUntilStep("databased score has correct mods", () => Realm.Run(r => r.Find<ScoreInfo>(Player.Score.ScoreInfo.ID)).Mods.First(), () => Is.EqualTo(playerMods.First()));
+            AddUntilStep("databased score has correct mods", () => Realm.Run(r => r.Find<ScoreInfo>(Player.Score.ScoreInfo.ID))!.Mods.First(), () => Is.EqualTo(playerMods.First()));
         }
 
         [Test]

osu.Game.Tests/Visual/Ranking/TestSceneContractedPanelMiddleContent.cs

@@ -33,7 +33,7 @@ namespace osu.Game.Tests.Visual.Ranking
             AddStep("show excess mods score", () =>
             {
                 var score = TestResources.CreateTestScoreInfo();
-                score.Mods = score.BeatmapInfo.Ruleset.CreateInstance().CreateAllMods().ToArray();
+                score.Mods = score.BeatmapInfo!.Ruleset.CreateInstance().CreateAllMods().ToArray();
                 showPanel(CreateWorkingBeatmap(CreateBeatmap(new OsuRuleset().RulesetInfo)), score);
             });
         }

osu.Game.Tests/Visual/Ranking/TestSceneExpandedPanelMiddleContent.cs

@@ -48,7 +48,7 @@ namespace osu.Game.Tests.Visual.Ranking
                 var author = new RealmUser { Username = "mapper_name" };
 
                 var score = TestResources.CreateTestScoreInfo(createTestBeatmap(author));
-                score.Mods = score.BeatmapInfo.Ruleset.CreateInstance().CreateAllMods().ToArray();
+                score.Mods = score.BeatmapInfo!.Ruleset.CreateInstance().CreateAllMods().ToArray();
 
                 showPanel(score);
             });

osu.Game.Tests/Visual/Ranking/TestSceneResultsScreen.cs

@@ -405,7 +405,7 @@ namespace osu.Game.Tests.Visual.Ranking
             public UnrankedSoloResultsScreen(ScoreInfo score)
                 : base(score, true)
             {
-                Score.BeatmapInfo.OnlineID = 0;
+                Score.BeatmapInfo!.OnlineID = 0;
                 Score.BeatmapInfo.Status = BeatmapOnlineStatus.Pending;
             }
 

osu.Game.Tests/Visual/SongSelect/TestScenePlaySongSelect.cs

@@ -163,7 +163,7 @@ namespace osu.Game.Tests.Visual.SongSelect
                 InputManager.Key(Key.Enter);
             });
 
-            AddUntilStep("wait for not current", () => !songSelect!.IsCurrentScreen());
+            waitForDismissed();
             AddAssert("ensure selection changed", () => selected != Beatmap.Value);
         }
 
@@ -186,7 +186,7 @@ namespace osu.Game.Tests.Visual.SongSelect
                 InputManager.Key(Key.Down);
             });
 
-            AddUntilStep("wait for not current", () => !songSelect!.IsCurrentScreen());
+            waitForDismissed();
             AddAssert("ensure selection didn't change", () => selected == Beatmap.Value);
         }
 
@@ -215,7 +215,7 @@ namespace osu.Game.Tests.Visual.SongSelect
                 InputManager.Key(Key.Enter);
             });
 
-            AddUntilStep("wait for not current", () => !songSelect!.IsCurrentScreen());
+            waitForDismissed();
             AddAssert("ensure selection changed", () => selected != Beatmap.Value);
         }
 
@@ -244,7 +244,7 @@ namespace osu.Game.Tests.Visual.SongSelect
                 InputManager.ReleaseButton(MouseButton.Left);
             });
 
-            AddUntilStep("wait for not current", () => !songSelect!.IsCurrentScreen());
+            waitForDismissed();
             AddAssert("ensure selection didn't change", () => selected == Beatmap.Value);
         }
 
@@ -257,7 +257,7 @@ namespace osu.Game.Tests.Visual.SongSelect
             createSongSelect();
 
             AddStep("push child screen", () => Stack.Push(new TestSceneOsuScreenStack.TestScreen("test child")));
-            AddUntilStep("wait for not current", () => !songSelect!.IsCurrentScreen());
+            waitForDismissed();
 
             AddStep("return", () => songSelect!.MakeCurrent());
             AddUntilStep("wait for current", () => songSelect!.IsCurrentScreen());
@@ -275,7 +275,7 @@ namespace osu.Game.Tests.Visual.SongSelect
             createSongSelect();
 
             AddStep("push child screen", () => Stack.Push(new TestSceneOsuScreenStack.TestScreen("test child")));
-            AddUntilStep("wait for not current", () => !songSelect!.IsCurrentScreen());
+            waitForDismissed();
 
             AddStep("change convert setting", () => config.SetValue(OsuSetting.ShowConvertedBeatmaps, true));
 
@@ -292,7 +292,7 @@ namespace osu.Game.Tests.Visual.SongSelect
             createSongSelect();
 
             AddStep("push child screen", () => Stack.Push(new TestSceneOsuScreenStack.TestScreen("test child")));
-            AddUntilStep("wait for not current", () => !songSelect!.IsCurrentScreen());
+            waitForDismissed();
 
             AddStep("update beatmap", () =>
             {
@@ -1011,7 +1011,7 @@ namespace osu.Game.Tests.Visual.SongSelect
                 });
             });
 
-            AddUntilStep("wait for results screen presented", () => !songSelect!.IsCurrentScreen());
+            waitForDismissed();
 
             AddAssert("check beatmap is correct for score", () => Beatmap.Value.BeatmapInfo.MatchesOnlineID(getPresentBeatmap()));
             AddAssert("check ruleset is correct for score", () => Ruleset.Value.OnlineID == 0);
@@ -1040,7 +1040,7 @@ namespace osu.Game.Tests.Visual.SongSelect
                 songSelect!.PresentScore(TestResources.CreateTestScoreInfo(getPresentBeatmap()));
             });
 
-            AddUntilStep("wait for results screen presented", () => !songSelect!.IsCurrentScreen());
+            waitForDismissed();
 
             AddAssert("check beatmap is correct for score", () => Beatmap.Value.BeatmapInfo.MatchesOnlineID(getPresentBeatmap()));
             AddAssert("check ruleset is correct for score", () => Ruleset.Value.OnlineID == 0);
@@ -1161,6 +1161,8 @@ namespace osu.Game.Tests.Visual.SongSelect
                 rulesets.Dispose();
         }
 
+        private void waitForDismissed() => AddUntilStep("wait for not current", () => !songSelect.AsNonNull().IsCurrentScreen());
+
         private partial class TestSongSelect : PlaySongSelect
         {
             public Action? StartRequested;

osu.Game.Tests/Visual/UserInterface/TestSceneModPresetColumn.cs

@@ -73,7 +73,7 @@ namespace osu.Game.Tests.Visual.UserInterface
 
                     var testPresets = createTestPresets();
                     foreach (var preset in testPresets)
-                        preset.Ruleset = realm.Find<RulesetInfo>(preset.Ruleset.ShortName);
+                        preset.Ruleset = realm.Find<RulesetInfo>(preset.Ruleset.ShortName)!;
 
                     realm.Add(testPresets);
                 });
@@ -103,7 +103,7 @@ namespace osu.Game.Tests.Visual.UserInterface
                     new ManiaModNightcore(),
                     new ManiaModHardRock()
                 },
-                Ruleset = r.Find<RulesetInfo>("mania")
+                Ruleset = r.Find<RulesetInfo>("mania")!
             })));
             AddUntilStep("2 panels visible", () => this.ChildrenOfType<ModPresetPanel>().Count() == 2);
 
@@ -115,7 +115,7 @@ namespace osu.Game.Tests.Visual.UserInterface
                     new OsuModHidden(),
                     new OsuModHardRock()
                 },
-                Ruleset = r.Find<RulesetInfo>("osu")
+                Ruleset = r.Find<RulesetInfo>("osu")!
             })));
             AddUntilStep("2 panels visible", () => this.ChildrenOfType<ModPresetPanel>().Count() == 2);
 

osu.Game.Tests/Visual/UserInterface/TestSceneModSelectOverlay.cs

@@ -60,7 +60,7 @@ namespace osu.Game.Tests.Visual.UserInterface
                     {
                         Name = "AR0",
                         Description = "Too... many... circles...",
-                        Ruleset = r.Find<RulesetInfo>(OsuRuleset.SHORT_NAME),
+                        Ruleset = r.Find<RulesetInfo>(OsuRuleset.SHORT_NAME)!,
                         Mods = new[]
                         {
                             new OsuModDifficultyAdjust
@@ -73,7 +73,7 @@ namespace osu.Game.Tests.Visual.UserInterface
                     {
                         Name = "Half Time 0.5x",
                         Description = "Very slow",
-                        Ruleset = r.Find<RulesetInfo>(OsuRuleset.SHORT_NAME),
+                        Ruleset = r.Find<RulesetInfo>(OsuRuleset.SHORT_NAME)!,
                         Mods = new[]
                         {
                             new OsuModHalfTime

osu.Game/BackgroundBeatmapProcessor.cs

@@ -102,7 +102,7 @@ namespace osu.Game
                             }
                         }
 
-                        r.Find<RulesetInfo>(ruleset.ShortName).LastAppliedDifficultyVersion = currentVersion;
+                        r.Find<RulesetInfo>(ruleset.ShortName)!.LastAppliedDifficultyVersion = currentVersion;
                     });
 
                     Logger.Log($"Finished resetting {countReset} beatmap sets for {ruleset.Name}");
@@ -163,8 +163,12 @@ namespace osu.Game
             {
                 foreach (var score in r.All<ScoreInfo>())
                 {
-                    if (score.Statistics.Sum(kvp => kvp.Value) > 0 && score.MaximumStatistics.Sum(kvp => kvp.Value) == 0)
+                    if (score.BeatmapInfo != null
+                        && score.Statistics.Sum(kvp => kvp.Value) > 0
+                        && score.MaximumStatistics.Sum(kvp => kvp.Value) == 0)
+                    {
                         scoreIds.Add(score.ID);
+                    }
                 }
             });
 
@@ -184,7 +188,7 @@ namespace osu.Game
                     // ReSharper disable once MethodHasAsyncOverload
                     realmAccess.Write(r =>
                     {
-                        r.Find<ScoreInfo>(id).MaximumStatisticsJson = JsonConvert.SerializeObject(score.MaximumStatistics);
+                        r.Find<ScoreInfo>(id)!.MaximumStatisticsJson = JsonConvert.SerializeObject(score.MaximumStatistics);
                     });
 
                     Logger.Log($"Populated maximum statistics for score {id}");
@@ -204,7 +208,9 @@ namespace osu.Game
         {
             Logger.Log("Querying for scores that need total score conversion...");
 
-            HashSet<Guid> scoreIds = realmAccess.Run(r => new HashSet<Guid>(r.All<ScoreInfo>().Where(s => s.TotalScoreVersion == 30000002).AsEnumerable().Select(s => s.ID)));
+            HashSet<Guid> scoreIds = realmAccess.Run(r => new HashSet<Guid>(r.All<ScoreInfo>()
+                                                                             .Where(s => s.BeatmapInfo != null && s.TotalScoreVersion == 30000002)
+                                                                             .AsEnumerable().Select(s => s.ID)));
 
             Logger.Log($"Found {scoreIds.Count} scores which require total score conversion.");
 
@@ -237,7 +243,7 @@ namespace osu.Game
                     // ReSharper disable once MethodHasAsyncOverload
                     realmAccess.Write(r =>
                     {
-                        ScoreInfo s = r.Find<ScoreInfo>(id);
+                        ScoreInfo s = r.Find<ScoreInfo>(id)!;
                         s.TotalScore = newTotalScore;
                         s.TotalScoreVersion = LegacyScoreEncoder.LATEST_VERSION;
                     });

osu.Game/Beatmaps/BeatmapImporter.cs

@@ -20,7 +20,6 @@ using osu.Game.IO;
 using osu.Game.IO.Archives;
 using osu.Game.Overlays.Notifications;
 using osu.Game.Rulesets;
-using osu.Game.Scoring;
 using Realms;
 
 namespace osu.Game.Beatmaps
@@ -69,7 +68,7 @@ namespace osu.Game.Beatmaps
 
                 Logger.Log($"Beatmap \"{updated}\" update completed successfully", LoggingTarget.Database);
 
-                original = realm.Find<BeatmapSetInfo>(original.ID);
+                original = realm!.Find<BeatmapSetInfo>(original.ID)!;
 
                 // Generally the import process will do this for us if the OnlineIDs match,
                 // but that isn't a guarantee (ie. if the .osu file doesn't have OnlineIDs populated).
@@ -210,8 +209,7 @@ namespace osu.Game.Beatmaps
             // Let's reattach any matching scores that exist in the database, based on hash.
             foreach (BeatmapInfo beatmap in model.Beatmaps)
             {
-                foreach (var score in realm.All<ScoreInfo>().Where(score => score.BeatmapHash == beatmap.Hash))
+                beatmap.UpdateLocalScores(realm);
-                    score.BeatmapInfo = beatmap;
             }
 
             ProcessBeatmap?.Invoke(model, parameters.Batch ? MetadataLookupScope.LocalCacheFirst : MetadataLookupScope.OnlineFirst);

osu.Game/Beatmaps/BeatmapInfo.cs

@@ -234,6 +234,22 @@ namespace osu.Game.Beatmaps
             }
         }
 
+        /// <summary>
+        /// Local scores are retained separate from a beatmap's lifetime, matched via <see cref="ScoreInfo.BeatmapHash"/>.
+        /// Therefore we need to detach / reattach scores when a beatmap is edited or imported.
+        /// </summary>
+        /// <param name="realm">A realm instance in an active write transaction.</param>
+        public void UpdateLocalScores(Realm realm)
+        {
+            // first disassociate any scores which are already attached and no longer valid.
+            foreach (var score in Scores)
+                score.BeatmapInfo = null;
+
+            // then attach any scores which match the new hash.
+            foreach (var score in realm.All<ScoreInfo>().Where(s => s.BeatmapHash == Hash))
+                score.BeatmapInfo = this;
+        }
+
         IBeatmapMetadataInfo IBeatmapInfo.Metadata => Metadata;
         IBeatmapSetInfo? IBeatmapInfo.BeatmapSet => BeatmapSet;
         IRulesetInfo IBeatmapInfo.Ruleset => Ruleset;

osu.Game/Beatmaps/BeatmapManager.cs

@@ -208,7 +208,7 @@ namespace osu.Game.Beatmaps
                 using (var transaction = r.BeginWrite())
                 {
                     if (!beatmapInfo.IsManaged)
-                        beatmapInfo = r.Find<BeatmapInfo>(beatmapInfo.ID);
+                        beatmapInfo = r.Find<BeatmapInfo>(beatmapInfo.ID)!;
 
                     beatmapInfo.Hidden = true;
                     transaction.Commit();
@@ -227,7 +227,7 @@ namespace osu.Game.Beatmaps
                 using (var transaction = r.BeginWrite())
                 {
                     if (!beatmapInfo.IsManaged)
-                        beatmapInfo = r.Find<BeatmapInfo>(beatmapInfo.ID);
+                        beatmapInfo = r.Find<BeatmapInfo>(beatmapInfo.ID)!;
 
                     beatmapInfo.Hidden = false;
                     transaction.Commit();
@@ -330,7 +330,7 @@ namespace osu.Game.Beatmaps
             Realm.Write(r =>
             {
                 if (!beatmapInfo.IsManaged)
-                    beatmapInfo = r.Find<BeatmapInfo>(beatmapInfo.ID);
+                    beatmapInfo = r.Find<BeatmapInfo>(beatmapInfo.ID)!;
 
                 Debug.Assert(beatmapInfo.BeatmapSet != null);
                 Debug.Assert(beatmapInfo.File != null);
@@ -460,13 +460,16 @@ namespace osu.Game.Beatmaps
 
                 Realm.Write(r =>
                 {
-                    var liveBeatmapSet = r.Find<BeatmapSetInfo>(setInfo.ID);
+                    var liveBeatmapSet = r.Find<BeatmapSetInfo>(setInfo.ID)!;
 
                     setInfo.CopyChangesToRealm(liveBeatmapSet);
 
                     if (transferCollections)
                         beatmapInfo.TransferCollectionReferences(r, oldMd5Hash);
 
+                    liveBeatmapSet.Beatmaps.Single(b => b.ID == beatmapInfo.ID)
+                                  .UpdateLocalScores(r);
+
                     // do not look up metadata.
                     // this is a locally-modified set now, so looking up metadata is busy work at best and harmful at worst.
                     ProcessBeatmap?.Invoke(liveBeatmapSet, MetadataLookupScope.None);

osu.Game/Beatmaps/BeatmapUpdater.cs

@@ -52,7 +52,7 @@ namespace osu.Game.Beatmaps
         /// </summary>
         /// <param name="beatmapSet">The managed beatmap set to update. A transaction will be opened to apply changes.</param>
         /// <param name="lookupScope">The preferred scope to use for metadata lookup.</param>
-        public void Process(BeatmapSetInfo beatmapSet, MetadataLookupScope lookupScope = MetadataLookupScope.LocalCacheFirst) => beatmapSet.Realm.Write(r =>
+        public void Process(BeatmapSetInfo beatmapSet, MetadataLookupScope lookupScope = MetadataLookupScope.LocalCacheFirst) => beatmapSet.Realm!.Write(_ =>
         {
             // Before we use below, we want to invalidate.
             workingBeatmapCache.Invalidate(beatmapSet);

osu.Game/Beatmaps/FramedBeatmapClock.cs

@@ -64,6 +64,8 @@ namespace osu.Game.Beatmaps
         [Resolved]
         private IBindable<WorkingBeatmap> beatmap { get; set; } = null!;
 
+        public bool IsRewinding { get; private set; }
+
         public bool IsCoupled
         {
             get => decoupledClock.IsCoupled;
@@ -133,6 +135,9 @@ namespace osu.Game.Beatmaps
             }
             else
                 finalClockSource.ProcessFrame();
+
+            if (Clock.ElapsedFrameTime != 0)
+                IsRewinding = Clock.ElapsedFrameTime < 0;
         }
 
         public double TotalAppliedOffset

osu.Game/Collections/CollectionDropdown.cs

@@ -59,7 +59,7 @@ namespace osu.Game.Collections
             Current.BindValueChanged(selectionChanged);
         }
 
-        private void collectionsChanged(IRealmCollection<BeatmapCollection> collections, ChangeSet? changes, Exception error)
+        private void collectionsChanged(IRealmCollection<BeatmapCollection> collections, ChangeSet? changes)
         {
             var selectedItem = SelectedItem?.Value?.Collection;
 

osu.Game/Collections/DrawableCollectionList.cs

@@ -41,7 +41,7 @@ namespace osu.Game.Collections
             realmSubscription = realm.RegisterForNotifications(r => r.All<BeatmapCollection>().OrderBy(c => c.Name), collectionsChanged);
         }
 
-        private void collectionsChanged(IRealmCollection<BeatmapCollection> collections, ChangeSet? changes, Exception error)
+        private void collectionsChanged(IRealmCollection<BeatmapCollection> collections, ChangeSet? changes)
         {
             Items.Clear();
             Items.AddRange(collections.AsEnumerable().Select(c => c.ToLive(realm)));

osu.Game/Collections/DrawableCollectionListItem.cs

@@ -197,7 +197,7 @@ namespace osu.Game.Collections
                 return true;
             }
 
-            private void deleteCollection() => collection.PerformWrite(c => c.Realm.Remove(c));
+            private void deleteCollection() => collection.PerformWrite(c => c.Realm!.Remove(c));
         }
     }
 }

osu.Game/Database/EmptyRealmSet.cs

@@ -19,8 +19,8 @@ namespace osu.Game.Database
         IEnumerator IEnumerable.GetEnumerator() => emptySet.GetEnumerator();
         public int Count => emptySet.Count;
         public T this[int index] => emptySet[index];
-        public int IndexOf(object item) => emptySet.IndexOf((T)item);
+        public int IndexOf(object? item) => item == null ? -1 : emptySet.IndexOf((T)item);
-        public bool Contains(object item) => emptySet.Contains((T)item);
+        public bool Contains(object? item) => item != null && emptySet.Contains((T)item);
 
         public event NotifyCollectionChangedEventHandler? CollectionChanged
         {

osu.Game/Database/ModelManager.cs

@@ -34,13 +34,13 @@ namespace osu.Game.Database
         }
 
         public void DeleteFile(TModel item, RealmNamedFileUsage file) =>
-            performFileOperation(item, managed => DeleteFile(managed, managed.Files.First(f => f.Filename == file.Filename), managed.Realm));
+            performFileOperation(item, managed => DeleteFile(managed, managed.Files.First(f => f.Filename == file.Filename), managed.Realm!));
 
         public void ReplaceFile(TModel item, RealmNamedFileUsage file, Stream contents) =>
-            performFileOperation(item, managed => ReplaceFile(file, contents, managed.Realm));
+            performFileOperation(item, managed => ReplaceFile(file, contents, managed.Realm!));
 
         public void AddFile(TModel item, Stream contents, string filename) =>
-            performFileOperation(item, managed => AddFile(managed, contents, filename, managed.Realm));
+            performFileOperation(item, managed => AddFile(managed, contents, filename, managed.Realm!));
 
         private void performFileOperation(TModel item, Action<TModel> operation)
         {
@@ -178,13 +178,14 @@ namespace osu.Game.Database
             // (ie. if an async import finished very recently).
             return Realm.Write(realm =>
             {
-                if (!item.IsManaged)
+                TModel? processableItem = item;
-                    item = realm.Find<TModel>(item.ID);
+                if (!processableItem.IsManaged)
+                    processableItem = realm.Find<TModel>(item.ID);
 
-                if (item?.DeletePending != false)
+                if (processableItem?.DeletePending != false)
                     return false;
 
-                item.DeletePending = true;
+                processableItem.DeletePending = true;
                 return true;
             });
         }
@@ -195,13 +196,14 @@ namespace osu.Game.Database
             // (ie. if an async import finished very recently).
             Realm.Write(realm =>
             {
-                if (!item.IsManaged)
+                TModel? processableItem = item;
-                    item = realm.Find<TModel>(item.ID);
+                if (!processableItem.IsManaged)
+                    processableItem = realm.Find<TModel>(item.ID);
 
-                if (item?.DeletePending != true)
+                if (processableItem?.DeletePending != true)
                     return;
 
-                item.DeletePending = false;
+                processableItem.DeletePending = false;
             });
         }
 

osu.Game/Database/RealmAccess.cs

@@ -535,7 +535,7 @@ namespace osu.Game.Database
             lock (notificationsResetMap)
             {
                 // Store an action which is used when blocking to ensure consumers don't use results of a stale changeset firing.
-                notificationsResetMap.Add(action, () => callback(new EmptyRealmSet<T>(), null, null));
+                notificationsResetMap.Add(action, () => callback(new EmptyRealmSet<T>(), null));
             }
 
             return RegisterCustomSubscription(action);
@@ -755,10 +755,10 @@ namespace osu.Game.Database
 
                         for (int i = 0; i < itemCount; i++)
                         {
-                            dynamic? oldItem = oldItems.ElementAt(i);
+                            dynamic oldItem = oldItems.ElementAt(i);
-                            dynamic? newItem = newItems.ElementAt(i);
+                            dynamic newItem = newItems.ElementAt(i);
 
-                            long? nullableOnlineID = oldItem?.OnlineID;
+                            long? nullableOnlineID = oldItem.OnlineID;
                             newItem.OnlineID = (int)(nullableOnlineID ?? -1);
                         }
                     }
@@ -795,7 +795,7 @@ namespace osu.Game.Database
 
                     for (int i = 0; i < metadataCount; i++)
                     {
-                        dynamic? oldItem = oldMetadata.ElementAt(i);
+                        dynamic oldItem = oldMetadata.ElementAt(i);
                         var newItem = newMetadata.ElementAt(i);
 
                         string username = oldItem.Author;
@@ -818,7 +818,7 @@ namespace osu.Game.Database
 
                     for (int i = 0; i < newSettings.Count; i++)
                     {
-                        dynamic? oldItem = oldSettings.ElementAt(i);
+                        dynamic oldItem = oldSettings.ElementAt(i);
                         var newItem = newSettings.ElementAt(i);
 
                         long rulesetId = oldItem.RulesetID;
@@ -843,7 +843,7 @@ namespace osu.Game.Database
 
                     for (int i = 0; i < newKeyBindings.Count; i++)
                     {
-                        dynamic? oldItem = oldKeyBindings.ElementAt(i);
+                        dynamic oldItem = oldKeyBindings.ElementAt(i);
                         var newItem = newKeyBindings.ElementAt(i);
 
                         if (oldItem.RulesetID == null)
@@ -897,7 +897,7 @@ namespace osu.Game.Database
                     var scores = migration.NewRealm.All<ScoreInfo>();
 
                     foreach (var score in scores)
-                        score.BeatmapHash = score.BeatmapInfo.Hash;
+                        score.BeatmapHash = score.BeatmapInfo?.Hash ?? string.Empty;
 
                     break;
                 }

osu.Game/Database/RealmLive.cs

@@ -4,6 +4,7 @@
 using System;
 using System.Diagnostics;
 using osu.Framework.Development;
+using osu.Framework.Extensions.ObjectExtensions;
 using osu.Framework.Statistics;
 using Realms;
 
@@ -104,7 +105,7 @@ namespace osu.Game.Database
 
             PerformRead(t =>
             {
-                using (var transaction = t.Realm.BeginWrite())
+                using (var transaction = t.Realm!.BeginWrite())
                 {
                     perform(t);
                     transaction.Commit();
@@ -133,7 +134,7 @@ namespace osu.Game.Database
         {
             Debug.Assert(ThreadSafety.IsUpdateThread);
 
-            if (dataIsFromUpdateThread && !data.Realm.IsClosed)
+            if (dataIsFromUpdateThread && !data.Realm.AsNonNull().IsClosed)
             {
                 RealmLiveStatistics.USAGE_UPDATE_IMMEDIATE.Value++;
                 return;
@@ -154,7 +155,7 @@ namespace osu.Game.Database
                 // To ensure that behaviour matches what we'd expect (the object *is* available), force
                 // a refresh to bring in any off-thread changes immediately.
                 realm.Refresh();
-                found = realm.Find<T>(ID);
+                found = realm.Find<T>(ID)!;
             }
 
             return found;

osu.Game/Database/RealmObjectExtensions.cs

@@ -43,7 +43,7 @@ namespace osu.Game.Database
              .ForMember(s => s.BeatmapSet, cc => cc.Ignore())
              .AfterMap((s, d) =>
              {
-                 d.Ruleset = d.Realm.Find<RulesetInfo>(s.Ruleset.ShortName);
+                 d.Ruleset = d.Realm!.Find<RulesetInfo>(s.Ruleset.ShortName)!;
                  copyChangesToRealm(s.Difficulty, d.Difficulty);
                  copyChangesToRealm(s.Metadata, d.Metadata);
              });
@@ -57,7 +57,7 @@ namespace osu.Game.Database
                      // Importantly, search all of realm for the beatmap (not just the set's beatmaps).
                      // It may have gotten detached, and if that's the case let's use this opportunity to fix
                      // things up.
-                     var existingBeatmap = d.Realm.Find<BeatmapInfo>(beatmap.ID);
+                     var existingBeatmap = d.Realm!.Find<BeatmapInfo>(beatmap.ID);
 
                      if (existingBeatmap != null)
                      {
@@ -77,7 +77,7 @@ namespace osu.Game.Database
                          {
                              ID = beatmap.ID,
                              BeatmapSet = d,
-                             Ruleset = d.Realm.Find<RulesetInfo>(beatmap.Ruleset.ShortName)
+                             Ruleset = d.Realm.Find<RulesetInfo>(beatmap.Ruleset.ShortName)!
                          };
 
                          d.Beatmaps.Add(newBeatmap);
@@ -282,12 +282,10 @@ namespace osu.Game.Database
         /// <returns>
         /// A subscription token. It must be kept alive for as long as you want to receive change notifications.
         /// To stop receiving notifications, call <see cref="M:System.IDisposable.Dispose" />.
-        ///
-        /// May be null in the case the provided collection is not managed.
         /// </returns>
         /// <seealso cref="M:Realms.CollectionExtensions.SubscribeForNotifications``1(System.Collections.Generic.IList{``0},Realms.NotificationCallbackDelegate{``0})" />
         /// <seealso cref="M:Realms.CollectionExtensions.SubscribeForNotifications``1(System.Linq.IQueryable{``0},Realms.NotificationCallbackDelegate{``0})" />
-        public static IDisposable? QueryAsyncWithNotifications<T>(this IRealmCollection<T> collection, NotificationCallbackDelegate<T> callback)
+        public static IDisposable QueryAsyncWithNotifications<T>(this IRealmCollection<T> collection, NotificationCallbackDelegate<T> callback)
             where T : RealmObjectBase
         {
             if (!RealmAccess.CurrentThreadSubscriptionsAllowed)

osu.Game/Input/Bindings/DatabasedKeyBindingContainer.cs

@@ -51,7 +51,7 @@ namespace osu.Game.Input.Bindings
 
         protected override void LoadComplete()
         {
-            realmSubscription = realm.RegisterForNotifications(queryRealmKeyBindings, (sender, _, _) =>
+            realmSubscription = realm.RegisterForNotifications(queryRealmKeyBindings, (sender, _) =>
             {
                 // The first fire of this is a bit redundant as this is being called in base.LoadComplete,
                 // but this is safest in case the subscription is restored after a context recycle.

osu.Game/Online/BeatmapDownloadTracker.cs

@@ -40,7 +40,7 @@ namespace osu.Game.Online
             // Used to interact with manager classes that don't support interface types. Will eventually be replaced.
             var beatmapSetInfo = new BeatmapSetInfo { OnlineID = TrackedItem.OnlineID };
 
-            realmSubscription = realm.RegisterForNotifications(r => r.All<BeatmapSetInfo>().Where(s => s.OnlineID == TrackedItem.OnlineID && !s.DeletePending), (items, _, _) =>
+            realmSubscription = realm.RegisterForNotifications(r => r.All<BeatmapSetInfo>().Where(s => s.OnlineID == TrackedItem.OnlineID && !s.DeletePending), (items, _) =>
             {
                 if (items.Any())
                     Schedule(() => UpdateState(DownloadState.LocallyAvailable));

osu.Game/Online/Chat/MessageNotifier.cs

@@ -171,6 +171,8 @@ namespace osu.Game.Online.Chat
 
         public abstract partial class HighlightMessageNotification : SimpleNotification
         {
+            public override string PopInSampleName => "UI/notification-mention";
+
             protected HighlightMessageNotification(Message message, Channel channel)
             {
                 this.message = message;

osu.Game/Online/Rooms/OnlinePlayBeatmapAvailabilityTracker.cs

@@ -107,7 +107,7 @@ namespace osu.Game.Online.Rooms
 
             // handles changes to hash that didn't occur from the import process (ie. a user editing the beatmap in the editor, somehow).
             realmSubscription?.Dispose();
-            realmSubscription = realm.RegisterForNotifications(_ => filteredBeatmaps(), (_, changes, _) =>
+            realmSubscription = realm.RegisterForNotifications(_ => filteredBeatmaps(), (_, changes) =>
             {
                 if (changes == null)
                     return;

osu.Game/Online/ScoreDownloadTracker.cs

@@ -48,7 +48,7 @@ namespace osu.Game.Online
             realmSubscription = realm.RegisterForNotifications(r => r.All<ScoreInfo>().Where(s =>
                 ((s.OnlineID > 0 && s.OnlineID == TrackedItem.OnlineID)
                  || (!string.IsNullOrEmpty(s.Hash) && s.Hash == TrackedItem.Hash))
-                && !s.DeletePending), (items, _, _) =>
+                && !s.DeletePending), (items, _) =>
             {
                 if (items.Any())
                     Schedule(() => UpdateState(DownloadState.LocallyAvailable));

osu.Game/Online/Spectator/SpectatorClient.cs

@@ -185,7 +185,7 @@ namespace osu.Game.Online.Spectator
                 IsPlaying = true;
 
                 // transfer state at point of beginning play
-                currentState.BeatmapID = score.ScoreInfo.BeatmapInfo.OnlineID;
+                currentState.BeatmapID = score.ScoreInfo.BeatmapInfo!.OnlineID;
                 currentState.RulesetID = score.ScoreInfo.RulesetID;
                 currentState.Mods = score.ScoreInfo.Mods.Select(m => new APIMod(m)).ToArray();
                 currentState.State = SpectatedUserState.Playing;

osu.Game/OsuGame.cs

@@ -289,9 +289,9 @@ namespace osu.Game
         {
             base.SetHost(host);
 
-            if (host.Window is SDL2Window sdlWindow)
+            if (host.Window != null)
             {
-                sdlWindow.DragDrop += path =>
+                host.Window.DragDrop += path =>
                 {
                     // on macOS/iOS, URL associations are handled via SDL_DROPFILE events.
                     if (path.StartsWith(OSU_PROTOCOL, StringComparison.Ordinal))

osu.Game/Overlays/BeatmapSet/Scores/ScoreTable.cs

@@ -163,7 +163,7 @@ namespace osu.Game.Overlays.BeatmapSet.Scores
                 },
                 username,
 #pragma warning disable 618
-                new StatisticText(score.MaxCombo, score.BeatmapInfo.MaxCombo, @"0\x"),
+                new StatisticText(score.MaxCombo, score.BeatmapInfo!.MaxCombo, @"0\x"),
 #pragma warning restore 618
             };
 

osu.Game/Overlays/BeatmapSet/Scores/TopScoreStatisticsSection.cs

@@ -123,7 +123,7 @@ namespace osu.Game.Overlays.BeatmapSet.Scores
                 accuracyColumn.Text = value.DisplayAccuracy;
                 maxComboColumn.Text = value.MaxCombo.ToLocalisableString(@"0\x");
 
-                ppColumn.Alpha = value.BeatmapInfo.Status.GrantsPerformancePoints() ? 1 : 0;
+                ppColumn.Alpha = value.BeatmapInfo!.Status.GrantsPerformancePoints() ? 1 : 0;
 
                 if (value.PP is double pp)
                     ppColumn.Text = pp.ToLocalisableString(@"N0");

osu.Game/Overlays/Dialog/PopupDialog.cs

@@ -225,7 +225,12 @@ namespace osu.Game.Overlays.Dialog
         /// <summary>
         /// Programmatically clicks the first button of the provided type.
         /// </summary>
-        public void PerformAction<T>() where T : PopupDialogButton => Buttons.OfType<T>().First().TriggerClick();
+        public void PerformAction<T>() where T : PopupDialogButton
+        {
+            // Buttons are regularly added in BDL or LoadComplete, so let's schedule to ensure
+            // they are ready to be pressed.
+            Schedule(() => Buttons.OfType<T>().First().TriggerClick());
+        }
 
         protected override bool OnKeyDown(KeyDownEvent e)
         {

osu.Game/Overlays/FirstRunSetup/ScreenBeatmaps.cs

@@ -123,7 +123,7 @@ namespace osu.Game.Overlays.FirstRunSetup
             beatmapSubscription?.Dispose();
         }
 
-        private void beatmapsChanged(IRealmCollection<BeatmapSetInfo> sender, ChangeSet? changes, Exception error) => Schedule(() =>
+        private void beatmapsChanged(IRealmCollection<BeatmapSetInfo> sender, ChangeSet? changes) => Schedule(() =>
         {
             currentlyLoadedBeatmaps.Text = FirstRunSetupBeatmapScreenStrings.CurrentlyLoadedBeatmaps(sender.Count);
 

osu.Game/Overlays/Mods/AddPresetPopover.cs

@@ -102,7 +102,7 @@ namespace osu.Game.Overlays.Mods
                 Name = nameTextBox.Current.Value,
                 Description = descriptionTextBox.Current.Value,
                 Mods = selectedMods.Value.ToArray(),
-                Ruleset = r.Find<RulesetInfo>(ruleset.Value.ShortName)
+                Ruleset = r.Find<RulesetInfo>(ruleset.Value.ShortName)!
             }));
 
             this.HidePopover();

osu.Game/Overlays/Mods/ModPresetColumn.cs

@@ -61,7 +61,7 @@ namespace osu.Game.Overlays.Mods
         private Task? latestLoadTask;
         internal bool ItemsLoaded => latestLoadTask?.IsCompleted == true;
 
-        private void asyncLoadPanels(IRealmCollection<ModPreset> presets, ChangeSet changes, Exception error)
+        private void asyncLoadPanels(IRealmCollection<ModPreset> presets, ChangeSet? changes)
         {
             cancellationTokenSource?.Cancel();
 

osu.Game/Overlays/Music/PlaylistOverlay.cs

@@ -109,7 +109,7 @@ namespace osu.Game.Overlays.Music
             beatmap.BindValueChanged(working => list.SelectedSet.Value = working.NewValue.BeatmapSetInfo.ToLive(realm), true);
         }
 
-        private void beatmapsChanged(IRealmCollection<BeatmapSetInfo> sender, ChangeSet changes, Exception error)
+        private void beatmapsChanged(IRealmCollection<BeatmapSetInfo> sender, ChangeSet changes)
         {
             if (changes == null)
             {

osu.Game/Overlays/NotificationOverlay.cs

@@ -169,7 +169,7 @@ namespace osu.Game.Overlays
 
             Logger.Log($"⚠️ {notification.Text}");
 
-            notification.Closed += notificationClosed;
+            notification.Closed += () => notificationClosed(notification);
 
             if (notification is IHasCompletionTarget hasCompletionTarget)
                 hasCompletionTarget.CompletionTarget = Post;
@@ -229,17 +229,20 @@ namespace osu.Game.Overlays
             mainContent.FadeEdgeEffectTo(0, WaveContainer.DISAPPEAR_DURATION, Easing.In);
         }
 
-        private void notificationClosed() => Schedule(() =>
+        private void notificationClosed(Notification notification) => Schedule(() =>
         {
             updateCounts();
 
             // this debounce is currently shared between popin/popout sounds, which means one could potentially not play when the user is expecting it.
             // popout is constant across all notification types, and should therefore be handled using playback concurrency instead, but seems broken at the moment.
-            playDebouncedSample("UI/overlay-pop-out");
+            playDebouncedSample(notification.PopOutSampleName);
         });
 
         private void playDebouncedSample(string sampleName)
         {
+            if (string.IsNullOrEmpty(sampleName))
+                return;
+
             if (lastSamplePlayback == null || Time.Current - lastSamplePlayback > OsuGameBase.SAMPLE_DEBOUNCE_TIME)
             {
                 audio.Samples.Get(sampleName)?.Play();

osu.Game/Overlays/Notifications/Notification.cs

@@ -50,7 +50,8 @@ namespace osu.Game.Overlays.Notifications
         /// </summary>
         public virtual bool DisplayOnTop => true;
 
-        public virtual string PopInSampleName => "UI/notification-pop-in";
+        public virtual string PopInSampleName => "UI/notification-default";
+        public virtual string PopOutSampleName => "UI/overlay-pop-out";
 
         protected NotificationLight Light;
 

osu.Game/Overlays/Notifications/ProgressCompletionNotification.cs

@@ -10,6 +10,8 @@ namespace osu.Game.Overlays.Notifications
 {
     public partial class ProgressCompletionNotification : SimpleNotification
     {
+        public override string PopInSampleName => "UI/notification-done";
+
         public ProgressCompletionNotification()
         {
             Icon = FontAwesome.Solid.Check;

osu.Game/Overlays/Notifications/ProgressNotification.cs

@@ -4,6 +4,8 @@
 using System;
 using System.Threading;
 using osu.Framework.Allocation;
+using osu.Framework.Audio;
+using osu.Framework.Audio.Sample;
 using osu.Framework.Extensions.Color4Extensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Colour;
@@ -32,6 +34,8 @@ namespace osu.Game.Overlays.Notifications
 
         protected override bool AllowFlingDismiss => false;
 
+        public override string PopOutSampleName => State is ProgressNotificationState.Cancelled ? base.PopOutSampleName : "";
+
         /// <summary>
         /// The function to post completion notifications back to.
         /// </summary>
@@ -127,6 +131,7 @@ namespace osu.Game.Overlays.Notifications
                     cancellationTokenSource.Cancel();
 
                     IconContent.FadeColour(ColourInfo.GradientVertical(Color4.Gray, Color4.Gray.Lighten(0.5f)), colour_fade_duration);
+                    cancelSample?.Play();
                     loadingSpinner.Hide();
 
                     var icon = new SpriteIcon
@@ -195,6 +200,8 @@ namespace osu.Game.Overlays.Notifications
 
         private LoadingSpinner loadingSpinner = null!;
 
+        private Sample? cancelSample;
+
         private readonly TextFlowContainer textDrawable;
 
         public ProgressNotification()
@@ -222,7 +229,7 @@ namespace osu.Game.Overlays.Notifications
         }
 
         [BackgroundDependencyLoader]
-        private void load(OsuColour colours)
+        private void load(OsuColour colours, AudioManager audioManager)
         {
             colourQueued = colours.YellowDark;
             colourActive = colours.Blue;
@@ -241,6 +248,8 @@ namespace osu.Game.Overlays.Notifications
                     Size = new Vector2(loading_spinner_size),
                 }
             });
+
+            cancelSample = audioManager.Samples.Get(@"UI/notification-cancel");
         }
 
         public override void Close(bool runFlingAnimation)

osu.Game/Overlays/Notifications/SimpleErrorNotification.cs

@@ -7,7 +7,7 @@ namespace osu.Game.Overlays.Notifications
 {
     public partial class SimpleErrorNotification : SimpleNotification
     {
-        public override string PopInSampleName => "UI/error-notification-pop-in";
+        public override string PopInSampleName => "UI/notification-error";
 
         public SimpleErrorNotification()
         {

osu.Game/Overlays/Settings/Sections/Input/KeyBindingRow.cs

@@ -440,7 +440,7 @@ namespace osu.Game.Overlays.Settings.Sections.Input
         }
 
         private void updateStoreFromButton(KeyButton button) =>
-            realm.WriteAsync(r => r.Find<RealmKeyBinding>(button.KeyBinding.ID).KeyCombinationString = button.KeyBinding.KeyCombinationString);
+            realm.WriteAsync(r => r.Find<RealmKeyBinding>(button.KeyBinding.ID)!.KeyCombinationString = button.KeyBinding.KeyCombinationString);
 
         private void updateIsDefaultValue()
         {

osu.Game/Overlays/Settings/Sections/SkinSection.cs

@@ -92,7 +92,7 @@ namespace osu.Game.Overlays.Settings.Sections
             });
         }
 
-        private void skinsChanged(IRealmCollection<SkinInfo> sender, ChangeSet changes, Exception error)
+        private void skinsChanged(IRealmCollection<SkinInfo> sender, ChangeSet changes)
         {
             // This can only mean that realm is recycling, else we would see the protected skins.
             // Because we are using `Live<>` in this class, we don't need to worry about this scenario too much.

osu.Game/Rulesets/Objects/Drawables/DrawableHitObject.cs

@@ -24,6 +24,7 @@ using osu.Game.Rulesets.Objects.Pooling;
 using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Rulesets.UI;
+using osu.Game.Screens.Play;
 using osu.Game.Skinning;
 using osuTK.Graphics;
 
@@ -688,7 +689,7 @@ namespace osu.Game.Rulesets.Objects.Drawables
         protected bool UpdateResult(bool userTriggered)
         {
             // It's possible for input to get into a bad state when rewinding gameplay, so results should not be processed
-            if (Time.Elapsed < 0)
+            if ((Clock as IGameplayClock)?.IsRewinding == true)
                 return false;
 
             if (Judged)

osu.Game/Rulesets/UI/FrameStabilityContainer.cs

@@ -171,6 +171,9 @@ namespace osu.Game.Rulesets.UI
             // The manual clock time has changed in the above code. The framed clock now needs to be updated
             // to ensure that the its time is valid for our children before input is processed
             framedClock.ProcessFrame();
+
+            if (framedClock.ElapsedFrameTime != 0)
+                IsRewinding = framedClock.ElapsedFrameTime < 0;
         }
 
         /// <summary>
@@ -247,6 +250,8 @@ namespace osu.Game.Rulesets.UI
 
         public IBindable<bool> IsPaused { get; } = new BindableBool();
 
+        public bool IsRewinding { get; private set; }
+
         public double CurrentTime => framedClock.CurrentTime;
 
         public double Rate => framedClock.Rate;

osu.Game/Rulesets/UI/GameplaySampleTriggerSource.cs

@@ -69,6 +69,14 @@ namespace osu.Game.Rulesets.UI
             hitSound.Play();
         });
 
+        protected override void Update()
+        {
+            base.Update();
+
+            if (gameplayClock?.IsRewinding == true)
+                mostValidObject = null;
+        }
+
         protected HitObject? GetMostValidObject()
         {
             if (mostValidObject == null || isAlreadyHit(mostValidObject))

osu.Game/Scoring/IScoreInfo.cs

@@ -28,7 +28,7 @@ namespace osu.Game.Scoring
 
         double? PP { get; }
 
-        IBeatmapInfo Beatmap { get; }
+        IBeatmapInfo? Beatmap { get; }
 
         IRulesetInfo Ruleset { get; }
 

osu.Game/Scoring/Legacy/LegacyScoreEncoder.cs

@@ -66,7 +66,7 @@ namespace osu.Game.Scoring.Legacy
             {
                 sw.Write((byte)(score.ScoreInfo.Ruleset.OnlineID));
                 sw.Write(LATEST_VERSION);
-                sw.Write(score.ScoreInfo.BeatmapInfo.MD5Hash);
+                sw.Write(score.ScoreInfo.BeatmapInfo!.MD5Hash);
                 sw.Write(score.ScoreInfo.User.Username);
                 sw.Write(FormattableString.Invariant($"lazer-{score.ScoreInfo.User.Username}-{score.ScoreInfo.Date}").ComputeMD5Hash());
                 sw.Write((ushort)(score.ScoreInfo.GetCount300() ?? 0));

osu.Game/Scoring/ScoreImporter.cs

@@ -64,12 +64,14 @@ namespace osu.Game.Scoring
 
         protected override void Populate(ScoreInfo model, ArchiveReader? archive, Realm realm, CancellationToken cancellationToken = default)
         {
+            Debug.Assert(model.BeatmapInfo != null);
+
             // Ensure the beatmap is not detached.
             if (!model.BeatmapInfo.IsManaged)
-                model.BeatmapInfo = realm.Find<BeatmapInfo>(model.BeatmapInfo.ID);
+                model.BeatmapInfo = realm.Find<BeatmapInfo>(model.BeatmapInfo.ID)!;
 
             if (!model.Ruleset.IsManaged)
-                model.Ruleset = realm.Find<RulesetInfo>(model.Ruleset.ShortName);
+                model.Ruleset = realm.Find<RulesetInfo>(model.Ruleset.ShortName)!;
 
             // These properties are known to be non-null, but these final checks ensure a null hasn't come from somewhere (or the refetch has failed).
             // Under no circumstance do we want these to be written to realm as null.
@@ -101,10 +103,12 @@ namespace osu.Game.Scoring
         /// <param name="score">The score to populate the statistics of.</param>
         public void PopulateMaximumStatistics(ScoreInfo score)
         {
+            Debug.Assert(score.BeatmapInfo != null);
+
             if (score.MaximumStatistics.Select(kvp => kvp.Value).Sum() > 0)
                 return;
 
-            var beatmap = score.BeatmapInfo.Detach();
+            var beatmap = score.BeatmapInfo!.Detach();
             var ruleset = score.Ruleset.Detach();
             var rulesetInstance = ruleset.CreateInstance();
 

osu.Game/Scoring/ScoreInfo.cs

@@ -35,9 +35,16 @@ namespace osu.Game.Scoring
         /// The <see cref="BeatmapInfo"/> this score was made against.
         /// </summary>
         /// <remarks>
-        /// When setting this, make sure to also set <see cref="BeatmapHash"/> to allow relational consistency when a beatmap is potentially changed.
+        /// <para>
+        /// This property may be <see langword="null"/> if the score was set on a beatmap (or a version of the beatmap) that is not available locally
+        /// e.g. due to online updates, or local modifications to the beatmap.
+        /// The property will only link to a <see cref="BeatmapInfo"/> if its <see cref="Beatmaps.BeatmapInfo.Hash"/> matches <see cref="BeatmapHash"/>.
+        /// </para>
+        /// <para>
+        /// Due to the above, whenever setting this, make sure to also set <see cref="BeatmapHash"/> to allow relational consistency when a beatmap is potentially changed.
+        /// </para>
         /// </remarks>
-        public BeatmapInfo BeatmapInfo { get; set; } = null!;
+        public BeatmapInfo? BeatmapInfo { get; set; }
 
         /// <summary>
         /// The <see cref="osu.Game.Beatmaps.BeatmapInfo.Hash"/> at the point in time when the score was set.
@@ -150,14 +157,12 @@ namespace osu.Game.Scoring
         public int RankInt { get; set; }
 
         IRulesetInfo IScoreInfo.Ruleset => Ruleset;
-        IBeatmapInfo IScoreInfo.Beatmap => BeatmapInfo;
+        IBeatmapInfo? IScoreInfo.Beatmap => BeatmapInfo;
         IUser IScoreInfo.User => User;
         IEnumerable<INamedFileUsage> IHasNamedFiles.Files => Files;
 
         #region Properties required to make things work with existing usages
 
-        public Guid BeatmapInfoID => BeatmapInfo.ID;
-
         public int UserID => RealmUser.OnlineID;
 
         public int RulesetID => Ruleset.OnlineID;

osu.Game/Scoring/ScoreInfoExtensions.cs

@@ -13,7 +13,7 @@ namespace osu.Game.Scoring
         /// <summary>
         /// A user-presentable display title representing this score.
         /// </summary>
-        public static string GetDisplayTitle(this IScoreInfo scoreInfo) => $"{scoreInfo.User.Username} playing {scoreInfo.Beatmap.GetDisplayTitle()}";
+        public static string GetDisplayTitle(this IScoreInfo scoreInfo) => $"{scoreInfo.User.Username} playing {scoreInfo.Beatmap?.GetDisplayTitle() ?? "unknown"}";
 
         /// <summary>
         /// Orders an array of <see cref="ScoreInfo"/>s by total score.

osu.Game/Scoring/ScoreManager.cs

@@ -141,7 +141,7 @@ namespace osu.Game.Scoring
         {
             Realm.Run(r =>
             {
-                var beatmapScores = r.Find<BeatmapInfo>(beatmap.ID).Scores.ToList();
+                var beatmapScores = r.Find<BeatmapInfo>(beatmap.ID)!.Scores.ToList();
                 Delete(beatmapScores, silent);
             });
         }

osu.Game/Scoring/ScorePerformanceCache.cs

@@ -34,7 +34,7 @@ namespace osu.Game.Scoring
         {
             var score = lookup.ScoreInfo;
 
-            var attributes = await difficultyCache.GetDifficultyAsync(score.BeatmapInfo, score.Ruleset, score.Mods, token).ConfigureAwait(false);
+            var attributes = await difficultyCache.GetDifficultyAsync(score.BeatmapInfo!, score.Ruleset, score.Mods, token).ConfigureAwait(false);
 
             // Performance calculation requires the beatmap and ruleset to be locally available. If not, return a default value.
             if (attributes?.Attributes == null)

osu.Game/Screens/Play/ComboEffects.cs

@@ -53,7 +53,7 @@ namespace osu.Game.Screens.Play
             if (gameplayClock.CurrentTime < firstBreakTime)
                 firstBreakTime = null;
 
-            if (gameplayClock.ElapsedFrameTime < 0)
+            if (gameplayClock.IsRewinding)
                 return;
 
             if (combo.NewValue == 0 && (combo.OldValue > 20 || (alwaysPlayFirst.Value && firstBreakTime == null)))

osu.Game/Screens/Play/GameplayClockContainer.cs

@@ -19,11 +19,10 @@ namespace osu.Game.Screens.Play
     [Cached(typeof(IGameplayClock))]
     public partial class GameplayClockContainer : Container, IAdjustableClock, IGameplayClock
     {
-        /// <summary>
-        /// Whether gameplay is paused.
-        /// </summary>
         public IBindable<bool> IsPaused => isPaused;
 
+        public bool IsRewinding => GameplayClock.IsRewinding;
+
         /// <summary>
         /// The source clock. Should generally not be used for any timekeeping purposes.
         /// </summary>

osu.Game/Screens/Play/IGameplayClock.cs

@@ -23,6 +23,14 @@ namespace osu.Game.Screens.Play
         /// </summary>
         IAdjustableAudioComponent AdjustmentsFromMods { get; }
 
+        /// <summary>
+        /// Whether gameplay is paused.
+        /// </summary>
         IBindable<bool> IsPaused { get; }
+
+        /// <summary>
+        /// Whether the clock is currently rewinding.
+        /// </summary>
+        bool IsRewinding { get; }
     }
 }

osu.Game/Screens/Play/SoloPlayer.cs

@@ -68,7 +68,7 @@ namespace osu.Game.Screens.Play
         {
             IBeatmapInfo beatmap = score.ScoreInfo.BeatmapInfo;
 
-            Debug.Assert(beatmap.OnlineID > 0);
+            Debug.Assert(beatmap!.OnlineID > 0);
 
             return new SubmitSoloScoreRequest(score.ScoreInfo, token, beatmap.OnlineID);
         }

osu.Game/Screens/Ranking/Expanded/ExpandedPanelMiddleContent.cs

@@ -66,7 +66,7 @@ namespace osu.Game.Screens.Ranking.Expanded
         [BackgroundDependencyLoader]
         private void load(BeatmapDifficultyCache beatmapDifficultyCache)
         {
-            var beatmap = score.BeatmapInfo;
+            var beatmap = score.BeatmapInfo!;
             var metadata = beatmap.BeatmapSet?.Metadata ?? beatmap.Metadata;
             string creator = metadata.Author.Username;
 

osu.Game/Screens/Ranking/ResultsScreen.cs

@@ -305,7 +305,7 @@ namespace osu.Game.Screens.Ranking
                 float origLocation = detachedPanelContainer.ToLocalSpace(screenSpacePos).X;
                 expandedPanel.MoveToX(origLocation)
                              .Then()
-                             .MoveToX(StatisticsPanel.SIDE_PADDING, 150, Easing.OutQuint);
+                             .MoveToX(StatisticsPanel.SIDE_PADDING, 400, Easing.OutElasticQuarter);
 
                 // Hide contracted panels.
                 foreach (var contracted in ScorePanelList.GetScorePanels().Where(p => p.State == PanelState.Contracted))
@@ -313,7 +313,7 @@ namespace osu.Game.Screens.Ranking
                 ScorePanelList.HandleInput = false;
 
                 // Dim background.
-                ApplyToBackground(b => b.FadeColour(OsuColour.Gray(0.1f), 150));
+                ApplyToBackground(b => b.FadeColour(OsuColour.Gray(0.4f), 400, Easing.OutQuint));
 
                 detachedPanel = expandedPanel;
             }
@@ -329,7 +329,7 @@ namespace osu.Game.Screens.Ranking
                 float origLocation = detachedPanel.Parent.ToLocalSpace(screenSpacePos).X;
                 detachedPanel.MoveToX(origLocation)
                              .Then()
-                             .MoveToX(0, 150, Easing.OutQuint);
+                             .MoveToX(0, 250, Easing.OutElasticQuarter);
 
                 // Show contracted panels.
                 foreach (var contracted in ScorePanelList.GetScorePanels().Where(p => p.State == PanelState.Contracted))
@@ -337,7 +337,7 @@ namespace osu.Game.Screens.Ranking
                 ScorePanelList.HandleInput = true;
 
                 // Un-dim background.
-                ApplyToBackground(b => b.FadeColour(OsuColour.Gray(0.5f), 150));
+                ApplyToBackground(b => b.FadeColour(OsuColour.Gray(0.5f), 250, Easing.OutQuint));
 
                 detachedPanel = null;
             }

osu.Game/Screens/Ranking/SoloResultsScreen.cs

@@ -63,7 +63,7 @@ namespace osu.Game.Screens.Ranking
 
         protected override APIRequest? FetchScores(Action<IEnumerable<ScoreInfo>>? scoresCallback)
         {
-            if (Score.BeatmapInfo.OnlineID <= 0 || Score.BeatmapInfo.Status <= BeatmapOnlineStatus.Pending)
+            if (Score.BeatmapInfo!.OnlineID <= 0 || Score.BeatmapInfo.Status <= BeatmapOnlineStatus.Pending)
                 return null;
 
             getScoreRequest = new GetScoresRequest(Score.BeatmapInfo, Score.Ruleset);

osu.Game/Screens/Ranking/Statistics/StatisticsPanel.cs

@@ -223,7 +223,7 @@ namespace osu.Game.Screens.Ranking.Statistics
 
         protected override void PopIn()
         {
-            this.FadeIn(150, Easing.OutQuint);
+            this.FadeIn(350, Easing.OutQuint);
 
             popInSample?.Play();
             wasOpened = true;
@@ -231,7 +231,7 @@ namespace osu.Game.Screens.Ranking.Statistics
 
         protected override void PopOut()
         {
-            this.FadeOut(150, Easing.OutQuint);
+            this.FadeOut(250, Easing.OutQuint);
 
             if (wasOpened)
                 popOutSample?.Play();

osu.Game/Screens/Select/BeatmapCarousel.cs

@@ -223,7 +223,7 @@ namespace osu.Game.Screens.Select
             subscriptionHiddenBeatmaps = realm.RegisterForNotifications(r => r.All<BeatmapInfo>().Where(b => b.Hidden), beatmapsChanged);
         }
 
-        private void deletedBeatmapSetsChanged(IRealmCollection<BeatmapSetInfo> sender, ChangeSet? changes, Exception? error)
+        private void deletedBeatmapSetsChanged(IRealmCollection<BeatmapSetInfo> sender, ChangeSet? changes)
         {
             // If loading test beatmaps, avoid overwriting with realm subscription callbacks.
             if (loadedTestBeatmaps)
@@ -236,7 +236,7 @@ namespace osu.Game.Screens.Select
                 removeBeatmapSet(sender[i].ID);
         }
 
-        private void beatmapSetsChanged(IRealmCollection<BeatmapSetInfo> sender, ChangeSet? changes, Exception? error)
+        private void beatmapSetsChanged(IRealmCollection<BeatmapSetInfo> sender, ChangeSet? changes)
         {
             // If loading test beatmaps, avoid overwriting with realm subscription callbacks.
             if (loadedTestBeatmaps)
@@ -255,7 +255,7 @@ namespace osu.Game.Screens.Select
                 foreach (var id in realmSets)
                 {
                     if (!root.BeatmapSetsByID.ContainsKey(id))
-                        UpdateBeatmapSet(realm.Realm.Find<BeatmapSetInfo>(id).Detach());
+                        UpdateBeatmapSet(realm.Realm.Find<BeatmapSetInfo>(id)!.Detach());
                 }
 
                 foreach (var id in root.BeatmapSetsByID.Keys)
@@ -315,7 +315,7 @@ namespace osu.Game.Screens.Select
             }
         }
 
-        private void beatmapsChanged(IRealmCollection<BeatmapInfo> sender, ChangeSet? changes, Exception? error)
+        private void beatmapsChanged(IRealmCollection<BeatmapInfo> sender, ChangeSet? changes)
         {
             // we only care about actual changes in hidden status.
             if (changes == null)

osu.Game/Screens/Select/BeatmapInfoWedge.cs

@@ -76,14 +76,12 @@ namespace osu.Game.Screens.Select
         protected override void PopIn()
         {
             this.MoveToX(0, animation_duration, Easing.OutQuint);
-            this.RotateTo(0, animation_duration, Easing.OutQuint);
             this.FadeIn(transition_duration);
         }
 
         protected override void PopOut()
         {
             this.MoveToX(-100, animation_duration, Easing.In);
-            this.RotateTo(10, animation_duration, Easing.In);
             this.FadeOut(transition_duration * 2, Easing.In);
         }
 

osu.Game/Screens/Select/Carousel/TopLocalRank.cs

@@ -68,7 +68,7 @@ namespace osu.Game.Screens.Select.Carousel
                     localScoresChanged);
             }, true);
 
-            void localScoresChanged(IRealmCollection<ScoreInfo> sender, ChangeSet? changes, Exception _)
+            void localScoresChanged(IRealmCollection<ScoreInfo> sender, ChangeSet? changes)
             {
                 // This subscription may fire from changes to linked beatmaps, which we don't care about.
                 // It's currently not possible for a score to be modified after insertion, so we can safely ignore callbacks with only modifications.

osu.Game/Screens/Select/Leaderboards/BeatmapLeaderboard.cs

@@ -193,7 +193,7 @@ namespace osu.Game.Screens.Select.Leaderboards
                                           + $" AND {nameof(ScoreInfo.DeletePending)} == false"
                     , beatmapInfo.ID, ruleset.Value.ShortName), localScoresChanged);
 
-            void localScoresChanged(IRealmCollection<ScoreInfo> sender, ChangeSet? changes, Exception exception)
+            void localScoresChanged(IRealmCollection<ScoreInfo> sender, ChangeSet? changes)
             {
                 if (cancellationToken.IsCancellationRequested)
                     return;

osu.Game/Screens/Select/LocalScoreDeleteDialog.cs

@@ -4,9 +4,7 @@
 using osu.Framework.Allocation;
 using osu.Game.Overlays.Dialog;
 using osu.Game.Scoring;
-using System.Diagnostics;
 using osu.Framework.Graphics.Sprites;
-using osu.Game.Beatmaps;
 
 namespace osu.Game.Screens.Select
 {
@@ -20,11 +18,8 @@ namespace osu.Game.Screens.Select
         }
 
         [BackgroundDependencyLoader]
-        private void load(BeatmapManager beatmapManager, ScoreManager scoreManager)
+        private void load(ScoreManager scoreManager)
         {
-            BeatmapInfo? beatmapInfo = beatmapManager.QueryBeatmap(b => b.ID == score.BeatmapInfoID);
-            Debug.Assert(beatmapInfo != null);
-
             BodyText = $"{score.User} ({score.DisplayAccuracy}, {score.Rank})";
 
             Icon = FontAwesome.Regular.TrashAlt;

osu.Game/Screens/Spectate/SpectatorScreen.cs

@@ -90,7 +90,7 @@ namespace osu.Game.Screens.Spectate
             }));
         }
 
-        private void beatmapsChanged(IRealmCollection<BeatmapSetInfo> items, ChangeSet changes, Exception ___)
+        private void beatmapsChanged(IRealmCollection<BeatmapSetInfo> items, ChangeSet changes)
         {
             if (changes?.InsertedIndices == null) return;
 

osu.Game/Skinning/RealmBackedResourceStore.cs

@@ -38,7 +38,7 @@ namespace osu.Game.Skinning
             realmSubscription?.Dispose();
         }
 
-        private void skinChanged(IRealmCollection<T> sender, ChangeSet changes, Exception error) => invalidateCache();
+        private void skinChanged(IRealmCollection<T> sender, ChangeSet? changes) => invalidateCache();
 
         protected override IEnumerable<string> GetFilenames(string name)
         {

osu.Game/Skinning/SkinImporter.cs

@@ -198,7 +198,7 @@ namespace osu.Game.Skinning
 
                 using (var streamContent = new MemoryStream(Encoding.UTF8.GetBytes(skinInfoJson)))
                 {
-                    modelManager.AddFile(s, streamContent, skin_info_file, s.Realm);
+                    modelManager.AddFile(s, streamContent, skin_info_file, s.Realm!);
                 }
 
                 // Then serialise each of the drawable component groups into respective files.
@@ -213,9 +213,9 @@ namespace osu.Game.Skinning
                         var oldFile = s.GetFile(filename);
 
                         if (oldFile != null)
-                            modelManager.ReplaceFile(oldFile, streamContent, s.Realm);
+                            modelManager.ReplaceFile(oldFile, streamContent, s.Realm!);
                         else
-                            modelManager.AddFile(s, streamContent, filename, s.Realm);
+                            modelManager.AddFile(s, streamContent, filename, s.Realm!);
                     }
                 }
 

osu.Game/Users/UserActivity.cs

@@ -111,7 +111,7 @@ namespace osu.Game.Users
 
             protected string Username => score.User.Username;
 
-            public BeatmapInfo BeatmapInfo => score.BeatmapInfo;
+            public BeatmapInfo? BeatmapInfo => score.BeatmapInfo;
 
             public WatchingReplay(ScoreInfo score)
             {

osu.Game/osu.Game.csproj

@@ -35,9 +35,9 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Realm" Version="10.20.0" />
+    <PackageReference Include="Realm" Version="11.1.2" />
-    <PackageReference Include="ppy.osu.Framework" Version="2023.625.0" />
+    <PackageReference Include="ppy.osu.Framework" Version="2023.707.0" />
-    <PackageReference Include="ppy.osu.Game.Resources" Version="2023.625.0" />
+    <PackageReference Include="ppy.osu.Game.Resources" Version="2023.707.0" />
     <PackageReference Include="Sentry" Version="3.28.1" />
     <PackageReference Include="SharpCompress" Version="0.32.2" />
     <PackageReference Include="NUnit" Version="3.13.3" />

osu.iOS.props

@@ -16,6 +16,6 @@
     <RuntimeIdentifier>iossimulator-x64</RuntimeIdentifier>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="ppy.osu.Framework.iOS" Version="2023.625.0" />
+    <PackageReference Include="ppy.osu.Framework.iOS" Version="2023.707.0" />
   </ItemGroup>
 </Project>