From ea536dea23c9b6cfe75693b679304ff416aa7688 Mon Sep 17 00:00:00 2001
From: Dean Herbert <pe@ppy.sh>
Date: Thu, 11 Nov 2021 14:45:40 +0900
Subject: [PATCH] Gracefully handle missing type rather than triggering
 `ArgumentNullException`

---
 osu.Game/Rulesets/RulesetStore.cs | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/osu.Game/Rulesets/RulesetStore.cs b/osu.Game/Rulesets/RulesetStore.cs
index 391bf2c07d..914f33a7ae 100644
--- a/osu.Game/Rulesets/RulesetStore.cs
+++ b/osu.Game/Rulesets/RulesetStore.cs
@@ -129,13 +129,18 @@ namespace osu.Game.Rulesets
                 {
                     try
                     {
-                        var instanceInfo = ((Ruleset)Activator.CreateInstance(Type.GetType(r.InstantiationInfo).AsNonNull())).RulesetInfo;
+                        var resolvedType = Type.GetType(r.InstantiationInfo);
 
-                        r.Name = instanceInfo.Name;
-                        r.ShortName = instanceInfo.ShortName;
-                        r.InstantiationInfo = instanceInfo.InstantiationInfo;
+                        if (resolvedType != null)
+                        {
+                            var instanceInfo = ((Ruleset)Activator.CreateInstance(resolvedType)).RulesetInfo;
 
-                        r.Available = true;
+                            r.Name = instanceInfo.Name;
+                            r.ShortName = instanceInfo.ShortName;
+                            r.InstantiationInfo = instanceInfo.InstantiationInfo;
+
+                            r.Available = true;
+                        }
                     }
                     catch
                     {