From df1191db5bcceeffd7e6e1f8c021b711f6b716a3 Mon Sep 17 00:00:00 2001
From: Paul Chote <pchote@users.noreply.github.com>
Date: Fri, 29 Jan 2021 22:47:10 +0000
Subject: [PATCH] Don't crash if a null uid is given to QueryRemoteMapDetails.

---
 OpenRA.Game/Map/MapCache.cs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/OpenRA.Game/Map/MapCache.cs b/OpenRA.Game/Map/MapCache.cs
index 0683936627..16bf4c0da8 100644
--- a/OpenRA.Game/Map/MapCache.cs
+++ b/OpenRA.Game/Map/MapCache.cs
@@ -166,6 +166,7 @@ namespace OpenRA
 		public void QueryRemoteMapDetails(string repositoryUrl, IEnumerable<string> uids, Action<MapPreview> mapDetailsReceived = null, Action queryFailed = null)
 		{
 			var maps = uids.Distinct()
+				.Where(uid => uid != null)
 				.Select(uid => previews[uid])
 				.Where(p => p.Status == MapStatus.Unavailable)
 				.ToDictionary(p => p.Uid, p => p);