From 893607c96c1d61539d7cd33f0ab10cc435ca2132 Mon Sep 17 00:00:00 2001
From: "alexey.lysiuk" <alexey.lysiuk@gmail.com>
Date: Sat, 1 Apr 2017 10:36:35 +0300
Subject: [PATCH] Fixed crash in decals handling caused by reference to
 undefined class

https://forum.drdteam.org/viewtopic.php?t=7589
---
 src/decallib.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/decallib.cpp b/src/decallib.cpp
index d4ca5984b..d9f22499e 100644
--- a/src/decallib.cpp
+++ b/src/decallib.cpp
@@ -370,6 +370,12 @@ void FDecalLib::ReadAllDecals ()
 	for (i = 0; i < PClassActor::AllActorClasses.Size(); i++)
 	{
 		AActor *def = (AActor*)GetDefaultByType (PClassActor::AllActorClasses[i]);
+		if (nullptr == def)
+		{
+			// This is referenced but undefined class
+			// The corresponding warning should be already reported by DECORATE parser
+			continue;
+		}
 
 		FName v = ENamedName(intptr_t(def->DecalGenerator));
 		if (v.IsValidName())