disconnect all the signals in the destruction

app/dockview.cpp

@@ -92,15 +92,11 @@ DockView::~DockView()
 {
     qDebug() << "dock view deleting...";
 
-    foreach (auto &var, connections) {
+    this->disconnect();
-        QObject::disconnect(var);
-    }
-
     qDebug() << "dock view connections deleted...";
 
     if (m_visibility) {
-        delete m_visibility.data();
+        delete m_visibility;
-        m_visibility.clear();
     }
 }
 

app/dockview.h

@@ -151,7 +151,6 @@ private:
     QPointer<PlasmaQuick::ConfigView> m_configView;
     QPointer<VisibilityManager> m_visibility;
     QList<PlasmaQuick::AppletQuickItem *> m_appletItems;
-    QList<QMetaObject::Connection> connections;
 };
 
 }