From 84acf920886c8f8172ac7d30a0e7b0b3ed749a31 Mon Sep 17 00:00:00 2001
From: Nikita Tsukanov <keks9n@gmail.com>
Date: Mon, 3 Feb 2020 20:17:50 +0300
Subject: [PATCH] Merge pull request #3507 from donandren/issues/3500

fix #3500 crash after close any fullscreen window  on mac
---
 native/Avalonia.Native/src/OSX/window.mm | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/native/Avalonia.Native/src/OSX/window.mm b/native/Avalonia.Native/src/OSX/window.mm
index 66cedf23e4..75112d5dab 100644
--- a/native/Avalonia.Native/src/OSX/window.mm
+++ b/native/Avalonia.Native/src/OSX/window.mm
@@ -804,7 +804,12 @@ NSArray* AllLoopModes = [NSArray arrayWithObjects: NSDefaultRunLoopMode, NSEvent
         [self removeTrackingArea:_area];
         _area = nullptr;
     }
-    
+
+    if (_parent == nullptr)
+    {
+        return;
+    }
+
     NSRect rect = NSZeroRect;
     rect.size = newSize;