1 files changed, 73 insertions, 0 deletions
diff --git a/tests/auto/widgets/kernel/qwidget_window/tst_qwidget_window.cpp b/tests/auto/widgets/kernel/qwidget_window/tst_qwidget_window.cpp
index 689a65518e..09956e69a2 100644
--- a/tests/auto/widgets/kernel/qwidget_window/tst_qwidget_window.cpp
+++ b/tests/auto/widgets/kernel/qwidget_window/tst_qwidget_window.cpp
@@ -82,6 +82,7 @@ private slots:
     void tst_dnd();
     void tst_dnd_events();
     void tst_dnd_propagation();
+    void tst_dnd_destroyOnDrop();
 #endif
 
     void tst_qtbug35600();
@@ -917,6 +918,78 @@ void tst_QWidget_window::tst_dnd_propagation()
 
     QCOMPARE(target.mDndEvents, "enter leave enter drop ");
 }
+
+class ReparentSelfOnDropWidget : public QWidget
+{
+public:
+    ReparentSelfOnDropWidget(QWidget *newFutureParent)
+        : m_newFutureParent(newFutureParent)
+    {
+        setAcceptDrops(true);
+
+        const QRect availableGeometry = QGuiApplication::primaryScreen()->availableGeometry();
+        auto width = availableGeometry.width() / 6;
+        auto height = availableGeometry.height() / 4;
+
+        setGeometry(availableGeometry.x() + 200, availableGeometry.y() + 200, width, height);
+
+        QLabel *label = new QLabel(QStringLiteral("Test"), this);
+        label->setGeometry(40, 40, 60, 60);
+        label->setAcceptDrops(true);
+    }
+
+    void dragEnterEvent(QDragEnterEvent *event) override
+    {
+        event->accept();
+    }
+
+    void dragMoveEvent(QDragMoveEvent *event) override
+    {
+        event->acceptProposedAction();
+    }
+
+    void dropEvent(QDropEvent *event) override
+    {
+        event->accept();
+        // Turn 'this' from a top-level widget to a child widget.
+        // This destroys the QWidgetWindow since the widget is no longer top-level.
+        setParent(m_newFutureParent);
+    }
+
+private:
+    QWidget *m_newFutureParent;
+};
+
+void tst_QWidget_window::tst_dnd_destroyOnDrop()
+{
+    if (QGuiApplication::platformName().startsWith(QLatin1String("wayland"), Qt::CaseInsensitive))
+        QSKIP("Wayland: This fails. Figure out why.");
+
+    QMimeData mimeData;
+    mimeData.setText(QLatin1String("testmimetext"));
+
+    QWidget newParent;
+    newParent.resize(400, 400);
+    newParent.show();
+    QVERIFY(QTest::qWaitForWindowActive(&newParent));
+
+    ReparentSelfOnDropWidget *target = new ReparentSelfOnDropWidget(&newParent);
+    target->show();
+    QVERIFY(QTest::qWaitForWindowActive(target));
+
+    Qt::DropActions supportedActions = Qt::DropAction::CopyAction;
+    QWindow *window = target->windowHandle();
+
+    auto posInsideDropTarget = QHighDpi::toNativePixels(QPoint(20, 20), window->screen());
+    auto posInsideLabel      = QHighDpi::toNativePixels(QPoint(60, 60), window->screen());
+
+    QWindowSystemInterface::handleDrag(window, &mimeData, posInsideDropTarget, supportedActions, {}, {});
+    QWindowSystemInterface::handleDrag(window, &mimeData, posInsideLabel, supportedActions, {}, {});
+    QWindowSystemInterface::handleDrop(window, &mimeData, posInsideLabel, supportedActions, {}, {});
+
+    QGuiApplication::processEvents();
+}
+
 #endif
 
 void tst_QWidget_window::tst_qtbug35600()