From d50ba4954aacf398bf259a4e41b9323d565edc0a Mon Sep 17 00:00:00 2001
From: "alexey.lysiuk" <alexey.lysiuk@gmail.com>
Date: Sat, 23 Dec 2017 15:27:32 +0200
Subject: [PATCH] Fixed potential crash when calling undefined function in
 ZScript

The following code which uses explicit class specifier led to a crash:
class C
{
	void F()
	{
		Object.Undefined();
	}
}
---
 src/scripting/backend/codegen.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/scripting/backend/codegen.cpp b/src/scripting/backend/codegen.cpp
index 564240203..d504282d1 100644
--- a/src/scripting/backend/codegen.cpp
+++ b/src/scripting/backend/codegen.cpp
@@ -8091,7 +8091,7 @@ FxExpression *FxMemberFunctionCall::Resolve(FCompileContext& ctx)
 					{
 						bool error;
 						PFunction *afd = FindClassMemberFunction(ccls, ctx.Class, MethodName, ScriptPosition, &error);
-						if ((afd->Variants[0].Flags & VARF_Method) && (afd->Variants[0].Flags & VARF_Virtual))
+						if ((nullptr != afd) && (afd->Variants[0].Flags & VARF_Method) && (afd->Variants[0].Flags & VARF_Virtual))
 						{
 							staticonly = false;
 							novirtual = true;