Fix crash on exit

src/effects/effectlist/view/effectlistwidget.cpp

@@ -60,7 +60,6 @@ void EffectListWidget::updateFavorite(const QModelIndex &index)
 
 EffectListWidget::~EffectListWidget()
 {
-    delete m_proxy;
     qDebug() << " - - -Deleting effect list widget";
 }
 

src/timeline2/view/timelinetabs.cpp

@@ -57,6 +57,12 @@ TimelineTabs::TimelineTabs(QWidget *parent)
     connect(pCore->monitorManager()->projectMonitor(), &Monitor::addEffect, m_mainTimeline->controller(), &TimelineController::addEffectToCurrentClip);
 }
 
+TimelineTabs::~TimelineTabs()
+{
+    // clear source
+    m_mainTimeline->setSource(QUrl());
+}
+
 TimelineWidget *TimelineTabs::getMainTimeline() const
 {
     return m_mainTimeline;

src/timeline2/view/timelinetabs.hpp

@@ -49,7 +49,7 @@ class TimelineTabs : public QTabWidget
 public:
     /* Construct the tabs as well as the widget for the main timeline */
     TimelineTabs(QWidget *parent);
-
+    virtual ~TimelineTabs();
     /* @brief Returns a pointer to the main timeline */
     TimelineWidget *getMainTimeline() const;
 

src/transitions/transitionlist/view/transitionlistwidget.cpp

@@ -53,7 +53,6 @@ TransitionListWidget::TransitionListWidget(QWidget *parent)
 
 TransitionListWidget::~TransitionListWidget()
 {
-    delete m_proxy;
     qDebug() << " - - -Deleting transition list widget";
 }