From aae428be2b671663a895636439d3d48f9557094e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Matthias=20Mail=C3=A4nder?= <matthias@mailaender.name>
Date: Sat, 28 Jun 2014 11:18:24 +0200
Subject: [PATCH] throw with a more helpful error than NullReferenceException

closes #5622
---
 OpenRA.Mods.RA/AI/HackyAI.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/OpenRA.Mods.RA/AI/HackyAI.cs b/OpenRA.Mods.RA/AI/HackyAI.cs
index 22292835c2..f994cd14d6 100644
--- a/OpenRA.Mods.RA/AI/HackyAI.cs
+++ b/OpenRA.Mods.RA/AI/HackyAI.cs
@@ -234,7 +234,7 @@ namespace OpenRA.Mods.RA.AI
 		ActorInfo GetInfoByCommonName(Dictionary<string, string[]> names, string commonName, Player owner)
 		{
 			if (!names.Any() || !names.ContainsKey(commonName))
-				return null;
+				throw new InvalidOperationException("Can't find {0} in the HackyAI UnitsCommonNames definition.".F(commonName));
 
 			return Map.Rules.Actors.Where(k => names[commonName].Contains(k.Key)).Random(random).Value;
 		}