Fix similar Bindable-related crashes

osu.Game.Tests/Utils/BindableValueAccessorTest.cs

@@ -0,0 +1,52 @@
+// 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 NUnit.Framework;
+using osu.Framework.Bindables;
+using osu.Game.Utils;
+
+namespace osu.Game.Tests.Utils
+{
+    [TestFixture]
+    public class BindableValueAccessorTest
+    {
+        [Test]
+        public void GetValue()
+        {
+            const int value = 1337;
+
+            BindableInt bindable = new BindableInt(value);
+            Assert.That(BindableValueAccessor.GetValue(bindable), Is.EqualTo(value));
+        }
+
+        [Test]
+        public void SetValue()
+        {
+            const int value = 1337;
+
+            BindableInt bindable = new BindableInt();
+            BindableValueAccessor.SetValue(bindable, value);
+
+            Assert.That(bindable.Value, Is.EqualTo(value));
+        }
+
+        [Test]
+        public void GetInvalidBindable()
+        {
+            BindableList<object> list = new BindableList<object>();
+            Assert.That(BindableValueAccessor.GetValue(list), Is.EqualTo(list));
+        }
+
+        [Test]
+        public void SetInvalidBindable()
+        {
+            const int value = 1337;
+
+            BindableList<int> list = new BindableList<int> { value };
+            BindableValueAccessor.SetValue(list, 2);
+
+            Assert.That(list, Has.Exactly(1).Items);
+            Assert.That(list[0], Is.EqualTo(value));
+        }
+    }
+}

osu.Game/Configuration/SettingSourceAttribute.cs

@@ -4,7 +4,6 @@
 using System;
 using System.Collections.Concurrent;
 using System.Collections.Generic;
-using System.Diagnostics;
 using System.Linq;
 using System.Reflection;
 using JetBrains.Annotations;
@@ -15,6 +14,7 @@ using osu.Framework.Graphics;
 using osu.Framework.Localisation;
 using osu.Game.Graphics.UserInterface;
 using osu.Game.Overlays.Settings;
+using osu.Game.Utils;
 
 namespace osu.Game.Configuration
 {
@@ -228,10 +228,7 @@ namespace osu.Game.Configuration
                     return b.Value;
 
                 case IBindable u:
-                    // An unknown (e.g. enum) generic type.
-                    var valueMethod = u.GetType().GetProperty(nameof(IBindable<int>.Value));
-                    Debug.Assert(valueMethod != null);
-                    return valueMethod.GetValue(u)!;
+                    return BindableValueAccessor.GetValue(u);
 
                 default:
                     // fall back for non-bindable cases.

osu.Game/Rulesets/Mods/Mod.cs

@@ -266,8 +266,7 @@ namespace osu.Game.Rulesets.Mods
 
                 // TODO: special case for handling number types
 
-                PropertyInfo property = targetSetting.GetType().GetProperty(nameof(Bindable<bool>.Value))!;
-                property.SetValue(targetSetting, property.GetValue(sourceSetting));
+                BindableValueAccessor.SetValue(targetSetting, BindableValueAccessor.GetValue(sourceSetting));
             }
         }
 

osu.Game/Utils/BindableValueAccessor.cs

@@ -0,0 +1,44 @@
+// 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.Linq;
+using System.Reflection;
+using osu.Framework.Bindables;
+using osu.Framework.Extensions.TypeExtensions;
+
+namespace osu.Game.Utils
+{
+    internal static class BindableValueAccessor
+    {
+        private static readonly MethodInfo get_method = typeof(BindableValueAccessor).GetMethod(nameof(getValue), BindingFlags.Static | BindingFlags.NonPublic)!;
+        private static readonly MethodInfo set_method = typeof(BindableValueAccessor).GetMethod(nameof(setValue), BindingFlags.Static | BindingFlags.NonPublic)!;
+
+        public static object GetValue(IBindable bindable)
+        {
+            Type? bindableWithValueType = bindable.GetType().GetInterfaces().FirstOrDefault(isBindableT);
+            if (bindableWithValueType == null)
+                return bindable;
+
+            return get_method.MakeGenericMethod(bindableWithValueType.GenericTypeArguments[0]).Invoke(null, [bindable])!;
+        }
+
+        public static void SetValue(IBindable bindable, object value)
+        {
+            Type? bindableWithValueType = bindable.GetType().EnumerateBaseTypes().FirstOrDefault(isBindableT);
+            if (bindableWithValueType == null)
+                return;
+
+            set_method.MakeGenericMethod(bindableWithValueType.GenericTypeArguments[0]).Invoke(null, [bindable, value]);
+        }
+
+        private static bool isBindableT(Type type)
+            => type.IsGenericType
+               && (type.GetGenericTypeDefinition() == typeof(Bindable<>)
+                   || type.GetGenericTypeDefinition() == typeof(IBindable<>));
+
+        private static object getValue<T>(object bindable) => ((IBindable<T>)bindable).Value!;
+
+        private static object setValue<T>(object bindable, object value) => ((Bindable<T>)bindable).Value = (T)value;
+    }
+}