Crash when inserting twice the same widget in QAbstractItemView

QAbstractItemView* some_view = ...;
QWidget* some_widget = ...;
QModelIndex some_index = ...;
some_view->setIndexWidget(some_index, some_widget); // (1)
some_view->setIndexWidget(some_index, some_widget); // (2)

void QAbstractItemView::setIndexWidget(const QModelIndex &index, QWidget *widget)
{
    Q_D(QAbstractItemView);
    if (!d->isIndexValid(index))
        return;
    QWidget* const oldWidget = indexWidget(index);
    if (oldWidget == widget)
      return;
    if (oldWidget) {
        d->persistent.remove(oldWidget);
        d->removeEditor(oldWidget);
        oldWidget->deleteLater();
    }