Segmentation fault in gtk 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;
}

(gdb) where
#0  0x0000003db7ebb5dc in gtk_container_add () from /lib64/libgtk-x11-2.0.so.0
#1  0x0000003429341a26 in QGtkStylePrivate::setupGtkWidget(_GtkWidget*) () from /lib64/libQtGui.so.4
#2  0x000000342934294e in QGtkStylePrivate::addWidget(_GtkWidget*) () from /lib64/libQtGui.so.4
#3  0x0000003429342da0 in QGtkStylePrivate::initGtkWidgets() const () from /lib64/libQtGui.so.4
#4  0x0000003429329681 in QGtkStyle::QGtkStyle() () from /lib64/libQtGui.so.4
#5  0x00000034292b3f81 in QStyleFactory::create(QString const&) () from /lib64/libQtGui.so.4
#6  0x0000003428fccc8a in QApplication::style() () from /lib64/libQtGui.so.4
#7  0x0000003428fccfe5 in QApplicationPrivate::initialize() () from /lib64/libQtGui.so.4
#8  0x0000003428fcd0e0 in QApplicationPrivate::construct(_XDisplay*, unsigned long, unsigned long) ()
   from /lib64/libQtGui.so.4
#9  0x0000003428fcd34f in QApplication::QApplication(int&, char**, int) () from /lib64/libQtGui.so.4
#10 0x0000000000400927 in testQt(int, char**) ()
#11 0x00000000004009ed in main ()