From c579f49e2a80a55a4004ff8e5b2ee76bda146387 Mon Sep 17 00:00:00 2001
From: Lars Knoll <lars.knoll@qt.io>
Date: Tue, 14 Nov 2017 15:52:34 +0100
Subject: [PATCH] Fix QML integration of widgets

We need to mark the object as deleted before destroying
it's declarative data, otherwise all sorts of bad things
can happen.

This fixes the qwidgetsinqml autotest in qtdeclarative.

Change-Id: I05a645ebe1ca7a50c8927e3dbd9ebb5aaf369a71
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
(cherry picked from commit 3e91625b58b4d7d2757678de9d77eef91e84df36)
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
---
 src/widgets/kernel/qwidget.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/widgets/kernel/qwidget.cpp b/src/widgets/kernel/qwidget.cpp
index c347ca0b59..a86834002c 100644
--- a/src/widgets/kernel/qwidget.cpp
+++ b/src/widgets/kernel/qwidget.cpp
@@ -1677,6 +1677,7 @@ QWidget::~QWidget()
         }
     }
 
+    d->wasDeleted = true;
     if (d->declarativeData) {
         if (static_cast<QAbstractDeclarativeDataImpl*>(d->declarativeData)->ownedByQml1) {
             if (QAbstractDeclarativeData::destroyed_qml1)
@@ -8476,7 +8477,7 @@ bool QWidgetPrivate::close_helper(CloseMode mode)
     data.is_closing = 1;
 
     QPointer<QWidget> that = q;
-    QPointer<QWidget> parentWidget = q->parentWidget();
+    QPointer<QWidget> parentWidget = (q->parentWidget() && !QObjectPrivate::get(q->parentWidget())->wasDeleted) ? q->parentWidget() : nullptr;
 
     bool quitOnClose = q->testAttribute(Qt::WA_QuitOnClose);
     if (mode != CloseNoEvent) {