From 65234e8e43cdbff29791caecf224cbb4b05062be Mon Sep 17 00:00:00 2001
From: Steven Kirk <grokys@users.noreply.github.com>
Date: Thu, 17 Jan 2019 21:48:08 +0100
Subject: [PATCH] Allow for null renderer.

This can happen in unit tests.
---
 src/Avalonia.Controls/TopLevel.cs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/Avalonia.Controls/TopLevel.cs b/src/Avalonia.Controls/TopLevel.cs
index 294b15a564..1201941a86 100644
--- a/src/Avalonia.Controls/TopLevel.cs
+++ b/src/Avalonia.Controls/TopLevel.cs
@@ -97,7 +97,11 @@ namespace Avalonia.Controls
             _renderInterface = TryGetService<IPlatformRenderInterface>(dependencyResolver);
 
             Renderer = impl.CreateRenderer(this);
-            Renderer.SceneInvalidated += SceneInvalidated;
+
+            if (Renderer != null)
+            {
+                Renderer.SceneInvalidated += SceneInvalidated;
+            }
 
             impl.SetInputRoot(this);