Segmentation fault at QBasicAtomicInt::ref after creating & destroying QApplication + QTreeView twice

#include <QtGui/QtGui>

void testQt(int argc, char** argv)
{
    QApplication* app = new QApplication(argc, argv);
    QTreeView* treeView = new QTreeView();
    delete treeView;
    delete app;
}

int main(int argc, char** argv)
{
    testQt(argc, argv);
    testQt(argc, argv);
    return 0;
}