Deleting item view selection model after setModel() call is unsafe

QItemSelectionModel *m = view->selectionModel();
view->setModel(new_model);
delete m;

#include <QApplication>

#include <QDirModel>

#include <QItemSelectionModel>

#include <QTreeView>


int main(int argc, char* argv[])
{
    QApplication app(argc, argv);

    QDirModel* model = new QDirModel();

    QTreeView* view = new QTreeView();

    view->setModel(model);

    view->show();

    QItemSelectionModel* old_selection_model = view->selectionModel();

    view->setModel(model);

    delete old_selection_model; // oops

    return app.exec();
}