#0 QLineF::unitVector (this=0x7fffffffa6f0) at .../qtbase/src/corelib/tools/qline.cpp:665 #1 0x00007ffff6d7039c in QLineF::setLength (this=0x7fffffffa6f0, len=1) at .../qtbase/src/corelib/tools/qline.h:378 #2 0x00007ffff6e8f08d in qt_stroke_side (it=0x7fffffffad60, stroker=0x5555555e8320, capFirst=false, startTangent=0x7fffffffad30) at .../qtbase/src/gui/painting/qstroker.cpp:672 #3 0x00007ffff6e89b5d in QStroker::processCurrentSubpath (this=0x5555555e8320) at .../qtbase/src/gui/painting/qstroker.cpp:426 #4 0x00007ffff6e88ca7 in QStrokerOps::end (this=0x5555555e8320) at .../qtbase/src/gui/painting/qstroker.cpp:221 #5 0x00007ffff6def25a in QPaintEngineEx::stroke (this=0x5555555efce0, path=..., pen=...) at .../qtbase/src/gui/painting/qpaintengineex.cpp:512 #6 0x00007ffff6dd4503 in QRasterPaintEngine::stroke (this=0x5555555efce0, path=..., pen=...) at .../qtbase/src/gui/painting/qpaintengine_raster.cpp:1677 #7 0x00007ffff6defe1a in QPaintEngineEx::draw (this=0x5555555efce0, path=...) at .../qtbase/src/gui/painting/qpaintengineex.cpp:609 #8 0x00007ffff6df152f in QPaintEngineEx::drawPath (this=0x5555555efce0, path=...) at .../qtbase/src/gui/painting/qpaintengineex.cpp:848 #9 0x00007ffff6dfdda3 in QPainter::drawPath (this=0x7fffffffc508, path=...) at .../qtbase/src/gui/painting/qpainter.cpp:3196 #10 0x0000555555557541 in MainWindow::paintEvent (this=0x7fffffffe4b0, event=0x7fffffffcf60) at .../QTBUG-89010/main.cpp:47 #11 0x00007ffff777fa34 in QWidget::event (this=0x7fffffffe4b0, event=0x7fffffffcf60) at .../qtbase/src/widgets/kernel/qwidget.cpp:8781 #12 0x00007ffff770578e in QApplicationPrivate::notify_helper (this=0x555555586680, receiver=0x7fffffffe4b0, e=0x7fffffffcf60) at .../qtbase/src/widgets/kernel/qapplication.cpp:3391 #13 0x00007ffff7705596 in QApplication::notify (this=0x7fffffffe4e0, receiver=0x7fffffffe4b0, e=0x7fffffffcf60) at .../qtbase/src/widgets/kernel/qapplication.cpp:3341 #14 0x00007ffff644a2fc in QCoreApplication::notifyInternal2 (receiver=0x7fffffffe4b0, event=0x7fffffffcf60) at .../qtbase/src/corelib/kernel/qcoreapplication.cpp:1040 #15 0x00007ffff644acdc in QCoreApplication::sendSpontaneousEvent (receiver=0x7fffffffe4b0, event=0x7fffffffcf60) at .../qtbase/src/corelib/kernel/qcoreapplication.cpp:1454 #16 0x00007ffff7775f48 in QWidgetPrivate::sendPaintEvent (this=0x5555555d4470, toBePainted=...) at .../qtbase/src/widgets/kernel/qwidget.cpp:5484 #17 0x00007ffff7775ae9 in QWidgetPrivate::drawWidget (this=0x5555555d4470, pdev=0x5555555e8150, rgn=..., offset=..., flags=..., sharedPainter=0x0, repaintManager=0x5555555e0320) at .../qtbase/src/widgets/kernel/qwidget.cpp:5434 #18 0x00007ffff77a31c3 in QWidgetRepaintManager::paintAndFlush (this=0x5555555e0320) at .../qtbase/src/widgets/kernel/qwidgetrepaintmanager.cpp:1009 #19 0x00007ffff77a1b60 in QWidgetRepaintManager::sync (this=0x5555555e0320, exposedWidget=0x7fffffffe4b0, exposedRegion=...) at .../qtbase/src/widgets/kernel/qwidgetrepaintmanager.cpp:743 #20 0x00007ffff776b0a8 in QWidgetPrivate::syncBackingStore (this=0x5555555d4470, region=...) at .../qtbase/src/widgets/kernel/qwidget.cpp:1754 #21 0x00007ffff77b1b3d in QWidgetWindow::handleExposeEvent (this=0x555555596b40, event=0x7fffffffe060) at .../qtbase/src/widgets/kernel/qwidgetwindow.cpp:1020 #22 0x00007ffff77ae573 in QWidgetWindow::event (this=0x555555596b40, event=0x7fffffffe060) at .../qtbase/src/widgets/kernel/qwidgetwindow.cpp:342 #23 0x00007ffff770578e in QApplicationPrivate::notify_helper (this=0x555555586680, receiver=0x555555596b40, e=0x7fffffffe060) at .../qtbase/src/widgets/kernel/qapplication.cpp:3391 #24 0x00007ffff7702e27 in QApplication::notify (this=0x7fffffffe4e0, receiver=0x555555596b40, e=0x7fffffffe060) at .../qtbase/src/widgets/kernel/qapplication.cpp:2753 #25 0x00007ffff644a2fc in QCoreApplication::notifyInternal2 (receiver=0x555555596b40, event=0x7fffffffe060) at .../qtbase/src/corelib/kernel/qcoreapplication.cpp:1040 #26 0x00007ffff644acdc in QCoreApplication::sendSpontaneousEvent (receiver=0x555555596b40, event=0x7fffffffe060) at .../qtbase/src/corelib/kernel/qcoreapplication.cpp:1454 #27 0x00007ffff6cd4b4b in QGuiApplicationPrivate::processExposeEvent (e=0x7fff8800ca30) at .../qtbase/src/gui/kernel/qguiapplication.cpp:3165 #28 0x00007ffff6cd02e2 in QGuiApplicationPrivate::processWindowSystemEvent (e=0x7fff8800ca30) at .../qtbase/src/gui/kernel/qguiapplication.cpp:2085 #29 0x00007ffff6d381be in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at .../qtbase/src/gui/kernel/qwindowsysteminterface.cpp:1169 #30 0x00007ffff262b581 in xcbSourceDispatch (source=0x5555555d1610) at .../qtbase/src/plugins/platforms/xcb/qxcbeventdispatcher.cpp:93 #31 0x00007ffff5b2cbdb in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #32 0x00007ffff5b2ce88 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #33 0x00007ffff5b2cf3f in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 #34 0x00007ffff6758d0c in QEventDispatcherGlib::processEvents (this=0x555555596bd0, flags=...) at .../qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:427 #35 0x00007ffff262b7bc in QXcbGlibEventDispatcher::processEvents (this=0x555555596bd0, flags=...) at .../qtbase/src/plugins/platforms/xcb/qxcbeventdispatcher.cpp:132 #36 0x00007ffff645a959 in QEventLoop::processEvents (this=0x7fffffffe400, flags=...) at .../qtbase/src/corelib/kernel/qeventloop.cpp:139 #37 0x00007ffff645ac8a in QEventLoop::exec (this=0x7fffffffe400, flags=...) at .../qtbase/src/corelib/kernel/qeventloop.cpp:232 #38 0x00007ffff644aaea in QCoreApplication::exec () at .../qtbase/src/corelib/kernel/qcoreapplication.cpp:1355 #39 0x00007ffff6ccfa64 in QGuiApplication::exec () at .../qtbase/src/gui/kernel/qguiapplication.cpp:1876 #40 0x00007ffff7702813 in QApplication::exec () at .../qtbase/src/widgets/kernel/qapplication.cpp:2605 #41 0x0000555555557607 in main (argc=1, argv=0x7fffffffe5f8) at .../QTBUG-89010/main.cpp:59