Fix other potential nullref cases that rider missed

osu.Game.Rulesets.Mania/Objects/Drawables/DrawableHoldNote.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.Diagnostics;
 using System.Linq;
 using osu.Framework.Bindables;
 using osu.Framework.Extensions.IEnumerableExtensions;
@@ -209,6 +210,8 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
 
             protected override void CheckForResult(bool userTriggered, double timeOffset)
             {
+                Debug.Assert(HitObject.HitWindows != null);
+
                 // Factor in the release lenience
                 timeOffset /= release_window_lenience;
 

osu.Game.Rulesets.Mania/Objects/Drawables/DrawableNote.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.Diagnostics;
 using osu.Framework.Bindables;
 using osu.Framework.Extensions.Color4Extensions;
 using osu.Framework.Graphics;
@@ -52,6 +53,8 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
 
         protected override void CheckForResult(bool userTriggered, double timeOffset)
         {
+            Debug.Assert(HitObject.HitWindows != null);
+
             if (!userTriggered)
             {
                 if (!HitObject.HitWindows.CanBeHit(timeOffset))

osu.Game.Rulesets.Osu.Tests/TestSceneShaking.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.Diagnostics;
 using osu.Framework.MathUtils;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Rulesets.Scoring;
@@ -13,8 +14,10 @@ namespace osu.Game.Rulesets.Osu.Tests
         {
             var drawableHitObject = base.CreateDrawableHitCircle(circle, auto);
 
-            Scheduler.AddDelayed(() => drawableHitObject.TriggerJudgement(),
+            Debug.Assert(drawableHitObject.HitObject.HitWindows != null);
-                drawableHitObject.HitObject.StartTime - (drawableHitObject.HitObject.HitWindows.HalfWindowFor(HitResult.Miss) + RNG.Next(0, 300)) - Time.Current);
+
+            double delay = drawableHitObject.HitObject.StartTime - (drawableHitObject.HitObject.HitWindows.HalfWindowFor(HitResult.Miss) + RNG.Next(0, 300)) - Time.Current;
+            Scheduler.AddDelayed(() => drawableHitObject.TriggerJudgement(), delay);
 
             return drawableHitObject;
         }

osu.Game.Rulesets.Osu/Mods/OsuModRelax.cs

@@ -3,6 +3,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Linq;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Objects.Types;
@@ -38,7 +39,12 @@ namespace osu.Game.Rulesets.Osu.Mods
                 if ((osuHit.HitObject is IHasEndTime hasEnd && time > hasEnd.EndTime) || osuHit.IsHit)
                     continue;
 
-                requiresHit |= osuHit is DrawableHitCircle && osuHit.IsHovered && osuHit.HitObject.HitWindows.CanBeHit(relativetime);
+                if (osuHit is DrawableHitCircle && osuHit.IsHovered)
+                {
+                    Debug.Assert(osuHit.HitObject.HitWindows != null);
+                    requiresHit |= osuHit.HitObject.HitWindows.CanBeHit(relativetime);
+                }
+
                 requiresHold |= (osuHit is DrawableSlider slider && (slider.Ball.IsHovered || osuHit.IsHovered)) || osuHit is DrawableSpinner;
             }
 

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

@@ -2,6 +2,7 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System;
+using System.Diagnostics;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
@@ -87,6 +88,8 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 
         protected override void CheckForResult(bool userTriggered, double timeOffset)
         {
+            Debug.Assert(HitObject.HitWindows != null);
+
             if (!userTriggered)
             {
                 if (!HitObject.HitWindows.CanBeHit(timeOffset))
@@ -119,6 +122,8 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 
         protected override void UpdateStateTransforms(ArmedState state)
         {
+            Debug.Assert(HitObject.HitWindows != null);
+
             switch (state)
             {
                 case ArmedState.Idle:

osu.Game.Rulesets.Osu/Replays/OsuAutoGenerator.cs

@@ -92,20 +92,20 @@ namespace osu.Game.Rulesets.Osu.Replays
             double endTime = (prev as IHasEndTime)?.EndTime ?? prev.StartTime;
 
             // Make the cursor stay at a hitObject as long as possible (mainly for autopilot).
-            if (h.StartTime - h.HitWindows.HalfWindowFor(HitResult.Miss) > endTime + h.HitWindows.HalfWindowFor(HitResult.Meh) + 50)
+            if (h.StartTime - HitWindows.HalfWindowFor(HitResult.Miss) > endTime + HitWindows.HalfWindowFor(HitResult.Meh) + 50)
             {
-                if (!(prev is Spinner) && h.StartTime - endTime < 1000) AddFrameToReplay(new OsuReplayFrame(endTime + h.HitWindows.HalfWindowFor(HitResult.Meh), new Vector2(prev.StackedEndPosition.X, prev.StackedEndPosition.Y)));
+                if (!(prev is Spinner) && h.StartTime - endTime < 1000) AddFrameToReplay(new OsuReplayFrame(endTime + HitWindows.HalfWindowFor(HitResult.Meh), new Vector2(prev.StackedEndPosition.X, prev.StackedEndPosition.Y)));
-                if (!(h is Spinner)) AddFrameToReplay(new OsuReplayFrame(h.StartTime - h.HitWindows.HalfWindowFor(HitResult.Miss), new Vector2(h.StackedPosition.X, h.StackedPosition.Y)));
+                if (!(h is Spinner)) AddFrameToReplay(new OsuReplayFrame(h.StartTime - HitWindows.HalfWindowFor(HitResult.Miss), new Vector2(h.StackedPosition.X, h.StackedPosition.Y)));
             }
-            else if (h.StartTime - h.HitWindows.HalfWindowFor(HitResult.Meh) > endTime + h.HitWindows.HalfWindowFor(HitResult.Meh) + 50)
+            else if (h.StartTime - HitWindows.HalfWindowFor(HitResult.Meh) > endTime + HitWindows.HalfWindowFor(HitResult.Meh) + 50)
             {
-                if (!(prev is Spinner) && h.StartTime - endTime < 1000) AddFrameToReplay(new OsuReplayFrame(endTime + h.HitWindows.HalfWindowFor(HitResult.Meh), new Vector2(prev.StackedEndPosition.X, prev.StackedEndPosition.Y)));
+                if (!(prev is Spinner) && h.StartTime - endTime < 1000) AddFrameToReplay(new OsuReplayFrame(endTime + HitWindows.HalfWindowFor(HitResult.Meh), new Vector2(prev.StackedEndPosition.X, prev.StackedEndPosition.Y)));
-                if (!(h is Spinner)) AddFrameToReplay(new OsuReplayFrame(h.StartTime - h.HitWindows.HalfWindowFor(HitResult.Meh), new Vector2(h.StackedPosition.X, h.StackedPosition.Y)));
+                if (!(h is Spinner)) AddFrameToReplay(new OsuReplayFrame(h.StartTime - HitWindows.HalfWindowFor(HitResult.Meh), new Vector2(h.StackedPosition.X, h.StackedPosition.Y)));
             }
-            else if (h.StartTime - h.HitWindows.HalfWindowFor(HitResult.Good) > endTime + h.HitWindows.HalfWindowFor(HitResult.Good) + 50)
+            else if (h.StartTime - HitWindows.HalfWindowFor(HitResult.Good) > endTime + HitWindows.HalfWindowFor(HitResult.Good) + 50)
             {
-                if (!(prev is Spinner) && h.StartTime - endTime < 1000) AddFrameToReplay(new OsuReplayFrame(endTime + h.HitWindows.HalfWindowFor(HitResult.Good), new Vector2(prev.StackedEndPosition.X, prev.StackedEndPosition.Y)));
+                if (!(prev is Spinner) && h.StartTime - endTime < 1000) AddFrameToReplay(new OsuReplayFrame(endTime + HitWindows.HalfWindowFor(HitResult.Good), new Vector2(prev.StackedEndPosition.X, prev.StackedEndPosition.Y)));
-                if (!(h is Spinner)) AddFrameToReplay(new OsuReplayFrame(h.StartTime - h.HitWindows.HalfWindowFor(HitResult.Good), new Vector2(h.StackedPosition.X, h.StackedPosition.Y)));
+                if (!(h is Spinner)) AddFrameToReplay(new OsuReplayFrame(h.StartTime - HitWindows.HalfWindowFor(HitResult.Good), new Vector2(h.StackedPosition.X, h.StackedPosition.Y)));
             }
         }
 

osu.Game.Rulesets.Osu/Replays/OsuAutoGeneratorBase.cs

@@ -6,6 +6,8 @@ using osu.Game.Beatmaps;
 using System;
 using System.Collections.Generic;
 using osu.Game.Replays;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Rulesets.Osu.UI;
 using osu.Game.Rulesets.Replays;
 
@@ -27,6 +29,11 @@ namespace osu.Game.Rulesets.Osu.Replays
         /// </summary>
         protected readonly double FrameDelay;
 
+        /// <summary>
+        /// The <see cref="HitObject"/> hit windows.
+        /// </summary>
+        protected readonly HitWindows HitWindows;
+
         #endregion
 
         #region Construction / Initialisation
@@ -41,6 +48,9 @@ namespace osu.Game.Rulesets.Osu.Replays
 
             // We are using ApplyModsToRate and not ApplyModsToTime to counteract the speed up / slow down from HalfTime / DoubleTime so that we remain at a constant framerate of 60 fps.
             FrameDelay = ApplyModsToRate(1000.0 / 60.0);
+
+            HitWindows = new OsuHitWindows();
+            HitWindows.SetDifficulty(Beatmap.BeatmapInfo.BaseDifficulty.OverallDifficulty);
         }
 
         #endregion

osu.Game.Rulesets.Taiko/Objects/Drawables/DrawableHit.cs

@@ -2,6 +2,7 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System;
+using System.Diagnostics;
 using System.Linq;
 using osu.Framework.Graphics;
 using osu.Game.Rulesets.Objects.Drawables;
@@ -34,6 +35,8 @@ namespace osu.Game.Rulesets.Taiko.Objects.Drawables
 
         protected override void CheckForResult(bool userTriggered, double timeOffset)
         {
+            Debug.Assert(HitObject.HitWindows != null);
+
             if (!userTriggered)
             {
                 if (!HitObject.HitWindows.CanBeHit(timeOffset))
@@ -94,6 +97,8 @@ namespace osu.Game.Rulesets.Taiko.Objects.Drawables
 
         protected override void UpdateStateTransforms(ArmedState state)
         {
+            Debug.Assert(HitObject.HitWindows != null);
+
             switch (state)
             {
                 case ArmedState.Idle: