From 66dbba5c16be533359b4cd8365f17738c5fd551e Mon Sep 17 00:00:00 2001
From: Wojtek Figat <wojtek@figat.pl>
Date: Sun, 9 Nov 2025 22:16:14 +0100
Subject: [PATCH] Fix crash if base material gets GCed before it's referenced
 by instance during loading

---
 Source/Engine/Content/Assets/MaterialInstance.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Source/Engine/Content/Assets/MaterialInstance.cpp b/Source/Engine/Content/Assets/MaterialInstance.cpp
index b3710ebbd..78a276a8a 100644
--- a/Source/Engine/Content/Assets/MaterialInstance.cpp
+++ b/Source/Engine/Content/Assets/MaterialInstance.cpp
@@ -218,10 +218,14 @@ Asset::LoadResult MaterialInstance::load()
     Guid baseMaterialId;
     headerStream.Read(baseMaterialId);
     auto baseMaterial = Content::LoadAsync<MaterialBase>(baseMaterialId);
+    if (baseMaterial)
+        baseMaterial->AddReference();
 
     // Load parameters
     if (Params.Load(&headerStream))
     {
+        if (baseMaterial)
+            baseMaterial->RemoveReference();
         LOG(Warning, "Cannot load material parameters.");
         return LoadResult::CannotLoadData;
     }
@@ -239,6 +243,7 @@ Asset::LoadResult MaterialInstance::load()
         ParamsChanged();
     }
 
+    baseMaterial->RemoveReference();
     return LoadResult::Ok;
 }