From 09b6118f688d713bd6b3caec680e06d3e280b83c Mon Sep 17 00:00:00 2001
From: Dan Walmsley <dan@walms.co.uk>
Date: Fri, 12 Oct 2018 00:22:53 +0100
Subject: [PATCH] fix window showmodal

---
 src/Avalonia.Native.OSX/window.mm | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Avalonia.Native.OSX/window.mm b/src/Avalonia.Native.OSX/window.mm
index 6338db63c0..5cf50efdc3 100644
--- a/src/Avalonia.Native.OSX/window.mm
+++ b/src/Avalonia.Native.OSX/window.mm
@@ -968,6 +968,7 @@ NSArray* AllLoopModes = [NSArray arrayWithObjects: NSDefaultRunLoopMode, NSEvent
 {
     ComPtr<WindowBaseImpl> _parent;
     bool _canBecomeKeyAndMain;
+    bool _closed;
 }
 
 - (void)pollModalSession:(nonnull NSModalSession)session
@@ -980,7 +981,7 @@ NSArray* AllLoopModes = [NSArray arrayWithObjects: NSDefaultRunLoopMode, NSEvent
             [self pollModalSession:session];
         });
     }
-    else
+    else if (!_closed)
     {
         [self orderOut:self];
         [NSApp endModalSession:session];
@@ -1014,6 +1015,7 @@ NSArray* AllLoopModes = [NSArray arrayWithObjects: NSDefaultRunLoopMode, NSEvent
 
 - (void)windowWillClose:(NSNotification *)notification
 {
+    _closed = true;
     _parent->BaseEvents->Closed();
 }