From 1ea26f1891d68e0879c09fc2c9ce1fa3f621d029 Mon Sep 17 00:00:00 2001
From: EvilFactory <evilfactory@users.noreply.github.com>
Date: Mon, 28 Nov 2022 16:49:11 -0300
Subject: [PATCH] Fix threading issue introduced by #117 once for all

---
 .../BarotraumaShared/SharedSource/Utils/ReflectionUtils.cs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/Barotrauma/BarotraumaShared/SharedSource/Utils/ReflectionUtils.cs b/Barotrauma/BarotraumaShared/SharedSource/Utils/ReflectionUtils.cs
index ee48a1eb3..552ccdc7a 100644
--- a/Barotrauma/BarotraumaShared/SharedSource/Utils/ReflectionUtils.cs
+++ b/Barotrauma/BarotraumaShared/SharedSource/Utils/ReflectionUtils.cs
@@ -16,9 +16,12 @@ namespace Barotrauma
         public static IEnumerable<Type> GetDerivedNonAbstract<T>()
         {
             Assembly assembly = typeof(T).Assembly;
-            if (!cachedNonAbstractTypes.ContainsKey(assembly))
+            lock (cachedNonAbstractTypes) 
             {
-                AddNonAbstractAssemblyTypes(assembly);
+                if (!cachedNonAbstractTypes.ContainsKey(assembly))
+                {
+                    AddNonAbstractAssemblyTypes(assembly);
+                }
             }
 
             #warning TODO: Add safety checks in case an assembly is unloaded without being removed from the cache.