Someone

Thread 0 Crashed:  Dispatch queue: com.apple.main-thread
0   QtGui                         	0x0000000100b7b918 QSortFilterProxyModelPrivate::proxy_to_source(QModelIndex const&) const + 376
1   QtGui                         	0x0000000100b7bb65 QSortFilterProxyModel::mapToSource(QModelIndex const&) const + 21
2   QtGui                         	0x0000000100b755e1 QSortFilterProxyModel::hasChildren(QModelIndex const&) const + 49
3   QtGui                         	0x0000000100b35a98 QTreeView::doItemsLayout() + 360
4   QtGui                         	0x0000000100ae6fff QAbstractItemView::timerEvent(QTimerEvent*) + 479
5   QtGui                         	0x0000000100b34d61 QTreeView::timerEvent(QTimerEvent*) + 81
6   QtCore                        	0x00000001014b11f0 QObject::event(QEvent*) + 432
7   QtGui                         	0x000000010065c9fe QWidget::event(QEvent*) + 78
8   QtGui                         	0x00000001009d379c QFrame::event(QEvent*) + 44
9   QtGui                         	0x0000000100a60b7b QAbstractScrollArea::event(QEvent*) + 123
10  QtGui                         	0x0000000100ae9e9b QAbstractItemView::event(QEvent*) + 139
11  QtGui                         	0x00000001006067cd QApplicationPrivate::notify_helper(QObject*, QEvent*) + 189
12  QtGui                         	0x000000010060d23d QApplication::notify(QObject*, QEvent*) + 349