From 3b46629a7b63c776a4a94b9e54163d602ff667e5 Mon Sep 17 00:00:00 2001
From: LotP1 <68976644+LotP1@users.noreply.github.com>
Date: Sun, 7 Dec 2025 03:14:09 +0100
Subject: [PATCH] fix crash when address list does not exist

---
 src/Ryujinx.HLE/HOS/Kernel/Threading/KAddressArbiter.cs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/Ryujinx.HLE/HOS/Kernel/Threading/KAddressArbiter.cs b/src/Ryujinx.HLE/HOS/Kernel/Threading/KAddressArbiter.cs
index 3e13b917a..c9ac86fc9 100644
--- a/src/Ryujinx.HLE/HOS/Kernel/Threading/KAddressArbiter.cs
+++ b/src/Ryujinx.HLE/HOS/Kernel/Threading/KAddressArbiter.cs
@@ -529,7 +529,13 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
             // The value is decremented if the number of threads waiting is less
             // or equal to the Count of threads to be signaled, or Count is zero
             // or negative. It is incremented if there are no threads waiting.
-            int waitingCount = _arbiterThreads[address].Count;
+            int waitingCount = 0;
+            
+            if (_arbiterThreads.TryGetValue(address, out List<KThread> threads))
+            {
+                waitingCount = threads.Count;
+            }
+            
 
             if (waitingCount > 0)
             {