From 7ba0eb5a0daae59c495bbf250fa37a2627950e94 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Morten=20Johan=20S=C3=B8rvig?= <morten.sorvig@digia.com>
Date: Wed, 21 May 2014 11:30:54 +0200
Subject: [PATCH] Cocoa: Prevent crash on QWindow delete.

Clear the QCocoaWindow pointer stored on the QNSWindowHelper
when detaching from the platform window. This makes
sure callbacks from cocoa does not try access deleted
Qt window objects.

Task-number: QTBUG-39141
Change-Id: I4672eae92940dcbd59a2848e56f94b50a828bbf6
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@digia.com>
---
 src/plugins/platforms/cocoa/qcocoawindow.mm | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/plugins/platforms/cocoa/qcocoawindow.mm b/src/plugins/platforms/cocoa/qcocoawindow.mm
index 651fedb26e..13e8dde012 100644
--- a/src/plugins/platforms/cocoa/qcocoawindow.mm
+++ b/src/plugins/platforms/cocoa/qcocoawindow.mm
@@ -182,6 +182,7 @@ static bool isMouseEvent(NSEvent *ev)
 
 - (void)detachFromPlatformWindow
 {
+    _platformWindow = 0;
     [self.window.delegate release];
     self.window.delegate = nil;
 }