From 1bd1ceae8b8340f9d0e06b55a301c4642324d64a Mon Sep 17 00:00:00 2001
From: Ulf Hermann <ulf.hermann@qt.io>
Date: Tue, 11 Jan 2022 12:42:47 +0100
Subject: [PATCH 4/5] QQuickAbstractButton: fix crash on destruction

If we listen for size changes we also need to remove the object listened
to when it's deleted.

Pick-to: 5.15 6.2 6.3
Fixes: QTBUG-99644
Change-Id: I613855ebd986b1e67685088020b88d8b070659cf
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>
(cherry picked from commit 720ffaeb60d43123522066e1de3a69ad551644aa in
qtdeclarative)
---
 src/quicktemplates2/qquickabstractbutton.cpp  | 11 +++++++++
 .../qquickabstractbutton_p_p.h                |  1 +
 tests/auto/controls/data/tst_switch.qml       | 23 +++++++++++++++++++
 3 files changed, 35 insertions(+)

diff --git a/src/quicktemplates2/qquickabstractbutton.cpp b/src/quicktemplates2/qquickabstractbutton.cpp
index 950e4e099..1df0c706d 100644
--- a/src/quicktemplates2/qquickabstractbutton.cpp
+++ b/src/quicktemplates2/qquickabstractbutton.cpp
@@ -387,6 +387,17 @@ void QQuickAbstractButtonPrivate::itemImplicitHeightChanged(QQuickItem *item)
         emit q->implicitIndicatorHeightChanged();
 }
 
+void QQuickAbstractButtonPrivate::itemDestroyed(QQuickItem *item)
+{
+    Q_Q(QQuickAbstractButton);
+    QQuickControlPrivate::itemDestroyed(item);
+    if (item == indicator) {
+        indicator = nullptr;
+        emit q->implicitIndicatorWidthChanged();
+        emit q->implicitIndicatorHeightChanged();
+    }
+}
+
 QQuickAbstractButton *QQuickAbstractButtonPrivate::findCheckedButton() const
 {
     Q_Q(const QQuickAbstractButton);
diff --git a/src/quicktemplates2/qquickabstractbutton_p_p.h b/src/quicktemplates2/qquickabstractbutton_p_p.h
index 9291c1a87..b729720f2 100644
--- a/src/quicktemplates2/qquickabstractbutton_p_p.h
+++ b/src/quicktemplates2/qquickabstractbutton_p_p.h
@@ -109,6 +109,7 @@ public:
 
     void itemImplicitWidthChanged(QQuickItem *item) override;
     void itemImplicitHeightChanged(QQuickItem *item) override;
+    void itemDestroyed(QQuickItem *item) override;
 
     // copied from qabstractbutton.cpp
     static const int AUTO_REPEAT_DELAY = 300;
diff --git a/tests/auto/controls/data/tst_switch.qml b/tests/auto/controls/data/tst_switch.qml
index b3fab41ca..10b6baa02 100644
--- a/tests/auto/controls/data/tst_switch.qml
+++ b/tests/auto/controls/data/tst_switch.qml
@@ -608,4 +608,27 @@ TestCase {
         mouseClick(control.indicator)
         verify(control.activeFocus)
     }
+
+    Component {
+        id: deletionOrder1
+        Item {
+            Image { id: innerImage }
+            Switch { indicator: innerImage }
+        }
+    }
+
+    Component {
+        id: deletionOrder2
+        Item {
+            Switch { indicator: innerImage }
+            Image { id: innerImage }
+        }
+    }
+
+    function test_deletionOrder() {
+        var control1 = createTemporaryObject(deletionOrder1, testCase)
+        verify(control1)
+        var control2 = createTemporaryObject(deletionOrder2, testCase)
+        verify(control2)
+    }
 }
-- 
2.37.3