Solved crash when undo/redoing clip move

src/GUI/Timeline.cpp

@@ -142,6 +142,7 @@ void Timeline::actionAddClip( Clip* clip, unsigned int track, qint64 start, Main
 void Timeline::actionMoveClip( const QUuid& uuid, unsigned int track, qint64 time, MainWorkflow::TrackType )
 {
     tracksView()->moveMediaItem( uuid, track, time );
+    Q_ASSERT( tracksView()->setItemOldTrack( uuid, track ) == true );
     tracksView()->updateDuration();
     tracksRuler()->update();
 }

src/GUI/TracksView.cpp

@@ -209,6 +209,21 @@ void TracksView::dragMoveEvent( QDragMoveEvent* event )
     moveMediaItem( m_dragItem, event->pos() );
 }
 
+bool TracksView::setItemOldTrack( const QUuid &uuid, uint32_t oldTrackNumber )
+{
+    QList<QGraphicsItem*> sceneItems = m_scene->items();
+
+    for ( int i = 0; i < sceneItems.size(); ++i )
+    {
+        AbstractGraphicsMediaItem* item =
+                dynamic_cast<AbstractGraphicsMediaItem*>( sceneItems.at( i ) );
+        if ( !item || item->uuid() != uuid ) continue;
+        item->oldTrackNumber = oldTrackNumber;
+        return true;
+    }
+    return false;
+}
+
 void TracksView::moveMediaItem( const QUuid& uuid, unsigned int track, qint64 time )
 {
     QList<QGraphicsItem*> sceneItems = m_scene->items();

src/GUI/TracksView.h

@@ -62,6 +62,14 @@ public:
     void                    setTool( ToolButtons button );
     ToolButtons             tool() { return m_tool; }
     WorkflowRenderer*       getRenderer() { return m_renderer; }
+    //MEGAFIXME
+    //FIXME
+    //REMOVEME
+    //TODO
+    //YOU'RE HIDING A BUG
+    //WRONG
+    //Ugly method provided by etix :)
+    bool                    setItemOldTrack( const QUuid& uuid, uint32_t oldTrackNumber );
 
 public slots:
     void                    clear();