From df898c0e446c7056e80662f0bc91794bead25d4c Mon Sep 17 00:00:00 2001
From: Stefan Csomor <csomor@advancedconcepts.ch>
Date: Sun, 11 Jun 2017 18:05:15 +0200
Subject: [PATCH] xcode 9 runtime checks showed nullptr access here in dialogs
 sample

---
 src/osx/carbon/statbrma.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/osx/carbon/statbrma.cpp b/src/osx/carbon/statbrma.cpp
index 506e8a1671..76dc302dd4 100644
--- a/src/osx/carbon/statbrma.cpp
+++ b/src/osx/carbon/statbrma.cpp
@@ -155,7 +155,8 @@ void wxStatusBarMac::OnPaint(wxPaintEvent& WXUNUSED(event))
     // that case, statusbar appearance shouldn't change. It also shouldn't
     // change if a window-modal sheet attached to this window is key.
     wxTopLevelWindow *tlw = wxDynamicCast(MacGetTopLevelWindow(), wxTopLevelWindow);
-    wxWindow *keyWindow = wxNonOwnedWindow::GetFromWXWindow(wxOSXGetKeyWindow())->MacGetTopLevelWindow();
+    wxNonOwnedWindow* directKeyWindow = wxNonOwnedWindow::GetFromWXWindow(wxOSXGetKeyWindow());
+    wxWindow *keyWindow = directKeyWindow ? directKeyWindow->MacGetTopLevelWindow() : NULL;
     while ( keyWindow && keyWindow != tlw )
     {
         wxDialog *dlg = wxDynamicCast(keyWindow, wxDialog);