From d91ba6d84ab8df3e16ddf794926bc8f3d5165cdb Mon Sep 17 00:00:00 2001
From: Garry Newman <garrynewman@users.noreply.github.com>
Date: Thu, 11 Apr 2019 21:38:06 +0100
Subject: [PATCH] Throw error if interface_pointer is null

---
 Generator/CodeWriter/Class.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Generator/CodeWriter/Class.cs b/Generator/CodeWriter/Class.cs
index 1077a63..1c0790f 100644
--- a/Generator/CodeWriter/Class.cs
+++ b/Generator/CodeWriter/Class.cs
@@ -430,7 +430,8 @@ private void Detect_InterfaceReturn( List<Argument> argList, List<Argument> call
             ReturnVar = "interface_pointer";
             ReturnType = ReturnType.Substring( 1 ).Trim( '*', ' ' );
 
-            AfterLines.Add( $"return new {ReturnType}( steamworks, interface_pointer );" );
+			AfterLines.Add( $"if ( interface_pointer == IntPtr.Zero ) throw new System.Exception( $\"Error getting interface {{pchVersion}}\");" );
+			AfterLines.Add( $"return new {ReturnType}( steamworks, interface_pointer );" );
         }
 
         private void Detect_VectorReturn( List<Argument> argList, List<Argument> callArgs )