From f23b1a672d8cc33f3e8a73ab103901b5cbab1123 Mon Sep 17 00:00:00 2001
From: Tom Daffin <tom@greenpear.com>
Date: Wed, 24 Oct 2018 05:23:15 -0600
Subject: [PATCH] Fix a crash when pressing F10 on a window that has no main
 menu

---
 src/Avalonia.Input/AccessKeyHandler.cs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/Avalonia.Input/AccessKeyHandler.cs b/src/Avalonia.Input/AccessKeyHandler.cs
index b36e145d44..d80acbcd34 100644
--- a/src/Avalonia.Input/AccessKeyHandler.cs
+++ b/src/Avalonia.Input/AccessKeyHandler.cs
@@ -234,8 +234,10 @@ namespace Avalonia.Input
 
                 case Key.F10:
                     _owner.ShowAccessKeys = _showingAccessKeys = true;
-                    MainMenu.Open();
-                    e.Handled = true;
+                    if (MainMenu != null){
+                        MainMenu.Open();
+                        e.Handled = true;
+                    }
                     break;
             }
         }