2dpainting example crashes on QNX

0  0x0000005ac30866cd in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, QFlags<QWidgetPrivate::DrawWidgetFlag>, QPainter*, QWidgetRepaintManager*) () from /home/Qt/installer/6.6.0/qnx_x86/lib/libQt6Widgets.so.6.6.0
#1  0x0000005ac309c9d2 in QWidgetRepaintManager::paintAndFlush() () from /home/Qt/installer/6.6.0/qnx_x86/lib/libQt6Widgets.so.6.6.0
#2  0x0000005ac309ce27 in QWidgetRepaintManager::sync(QWidget*, QRegion const&) ()
   from /home/Qt/installer/6.6.0/qnx_x86/lib/libQt6Widgets.so.6.6.0
#3  0x0000005ac30a6364 in QWidgetWindow::handleExposeEvent(QExposeEvent*) () from /home/Qt/installer/6.6.0/qnx_x86/lib/libQt6Widgets.so.6.6.0
#4  0x0000005ac30a6dab in QWidgetWindow::event(QEvent*) () from /home/Qt/installer/6.6.0/qnx_x86/lib/libQt6Widgets.so.6.6.0
#5  0x0000005ac3033c51 in QApplicationPrivate::notify_helper(QObject*, QEvent*) ()
   from /home/Qt/installer/6.6.0/qnx_x86/lib/libQt6Widgets.so.6.6.0
#6  0x0000005ac303d764 in QApplication::notify(QObject*, QEvent*) () from /home/Qt/installer/6.6.0/qnx_x86/lib/libQt6Widgets.so.6.6.0
#7  0x0000005ac4d56909 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /home/Qt/installer/6.6.0/qnx_x86/lib/libQt6Core.so.6.6.0
#8  0x0000005ac3d16647 in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) ()
   from /home/Qt/installer/6.6.0/qnx_x86/lib/libQt6Gui.so.6.6.0
#9  0x0000005ac3d1742d in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) ()
   from /home/Qt/installer/6.6.0/qnx_x86/lib/libQt6Gui.so.6.6.0
#10 0x0000005ac3d7d94b in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /home/Qt/installer/6.6.0/qnx_x86/lib/libQt6Gui.so.6.6.0
#11 0x0000005ac41e11f6 in QUnixEventDispatcherQPA::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /home/Qt/installer/6.6.0/qnx_x86/lib/libQt6Gui.so.6.6.0
#12 0x0000005ac4d62383 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /home/Qt/installer/6.6.0/qnx_x86/lib/libQt6Core.so.6.6.0
#13 0x0000005ac4d5e6e6 in QCoreApplication::exec() () from /home/Qt/installer/6.6.0/qnx_x86/lib/libQt6Core.so.6.6.0
#14 0x0000003bfa36918a in main (argc=1, argv=0x170a53ba08) at /home/Qt/installer/Examples/Qt-6.6.0/opengl/2dpainting/main.cpp:19

Same happens also at least with cube example.