From 8946f4f80d17e848b16639c033470b9eff84f294 Mon Sep 17 00:00:00 2001
From: Dan Walmsley <dan@walms.co.uk>
Date: Fri, 6 Nov 2020 17:51:10 +0000
Subject: [PATCH] prevent NRE when popup is open and main window closes.

---
 src/Avalonia.Native/WindowImplBase.cs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/Avalonia.Native/WindowImplBase.cs b/src/Avalonia.Native/WindowImplBase.cs
index 2cf1fe2963..41009232e4 100644
--- a/src/Avalonia.Native/WindowImplBase.cs
+++ b/src/Avalonia.Native/WindowImplBase.cs
@@ -155,6 +155,7 @@ namespace Avalonia.Native
                 }
                 finally
                 {
+                    _parent._native = null;
                     n?.Dispose();
                 }