(gdb) bt
#0  0x00007ffff6f04d66 in QOpenGLContext::functions() const ()
    at /home/efif/Qt/6.7.1/gcc_64/lib/libQt6Gui.so.6
#1  0x00007ffff7bdd432 in  ()
    at /home/efif/Qt/6.7.1/gcc_64/lib/libQt6OpenGLWidgets.so.6
#2  0x00007ffff7bde6c8 in  ()
    at /home/efif/Qt/6.7.1/gcc_64/lib/libQt6OpenGLWidgets.so.6
#3  0x00007ffff7654abe in QWidget::event(QEvent*) ()
    at /home/efif/Qt/6.7.1/gcc_64/lib/libQt6Widgets.so.6
#4  0x00007ffff75fd4f2 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
    () at /home/efif/Qt/6.7.1/gcc_64/lib/libQt6Widgets.so.6
#5  0x00007ffff645920a in QCoreApplication::notifyInternal2(QObject*, QEvent*)
    () at /home/efif/Qt/6.7.1/gcc_64/lib/libQt6Core.so.6
#6  0x00007ffff764c5d6 in QWidgetPrivate::sendPaintEvent(QRegion const&) ()
    at /home/efif/Qt/6.7.1/gcc_64/lib/libQt6Widgets.so.6
#7  0x00007ffff7bde047 in QOpenGLWidget::resizeEvent(QResizeEvent*) ()
    at /home/efif/Qt/6.7.1/gcc_64/lib/libQt6OpenGLWidgets.so.6
#8  0x00007ffff76552e1 in QWidget::event(QEvent*) ()
    at /home/efif/Qt/6.7.1/gcc_64/lib/libQt6Widgets.so.6
#9  0x00007ffff75fd4f2 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
    () at /home/efif/Qt/6.7.1/gcc_64/lib/libQt6Widgets.so.6
#10 0x00007ffff645920a in QCoreApplication::notifyInternal2(QObject*, QEvent*)
    () at /home/efif/Qt/6.7.1/gcc_64/lib/libQt6Core.so.6
#11 0x00007ffff764c50e in QWidgetPrivate::sendPendingMoveAndResizeEvents(bool, bool) () at /home/efif/Qt/6.7.1/gcc_64/lib/libQt6Widgets.so.6
#12 0x00007ffff76542d3 in QWidgetPrivate::show_helper() ()
    at /home/efif/Qt/6.7.1/gcc_64/lib/libQt6Widgets.so.6
#13 0x00007ffff7653853 in QWidgetPrivate::setVisible(bool) ()
    at /home/efif/Qt/6.7.1/gcc_64/lib/libQt6Widgets.so.6
#14 0x00005555555c1d02 in CGAL::draw_graphics_scene(CGAL::Graphics_scene const&, char const*) ()
#15 0x00005555555d1425 in void CGAL::draw<CGAL::....