From 51a47b3a946d693d54abbec0e9dd3b184aba1969 Mon Sep 17 00:00:00 2001
From: Steven Kirk <grokys@gmail.com>
Date: Mon, 22 Jan 2018 00:07:19 +0100
Subject: [PATCH] Instance can be null here.

Was causing intermittently failing test: https://ci.appveyor.com/project/AvaloniaUI/Avalonia/build/0.1.4468
---
 .../Data/Plugins/AvaloniaPropertyAccessorPlugin.cs              | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Markup/Avalonia.Markup/Data/Plugins/AvaloniaPropertyAccessorPlugin.cs b/src/Markup/Avalonia.Markup/Data/Plugins/AvaloniaPropertyAccessorPlugin.cs
index 3f6f15ed5b..90eabc69fb 100644
--- a/src/Markup/Avalonia.Markup/Data/Plugins/AvaloniaPropertyAccessorPlugin.cs
+++ b/src/Markup/Avalonia.Markup/Data/Plugins/AvaloniaPropertyAccessorPlugin.cs
@@ -104,7 +104,7 @@ namespace Avalonia.Markup.Data.Plugins
 
             protected override void SubscribeCore(IObserver<object> observer)
             {
-                _subscription = Instance.GetWeakObservable(_property).Subscribe(observer);
+                _subscription = Instance?.GetWeakObservable(_property).Subscribe(observer);
             }
         }
     }