#0  0x00007fff7256ac10 in BSplCLib::FirstUKnotIndex(int, TColStd_Array1OfInteger const&) () from /opt/opencascade/lib/libTKMath.so.0
#1  0x00007fff7256b047 in BSplCLib::LocateParameter(int, TColStd_Array1OfReal const&, TColStd_Array1OfInteger const&, double, unsigned int, int&, double&) () from /opt/opencascade/lib/libTKMath.so.0
#2  0x00007fff72c23f1d in Geom2d_BSplineCurve::ValidateCache(double) () from /opt/opencascade/lib/libTKG2d.so.0
#3  0x00007fff72c252ae in Geom2d_BSplineCurve::D0(double, gp_Pnt2d&) const () from /opt/opencascade/lib/libTKG2d.so.0
#4  0x00007fff7096dc17 in BRep_CurveOnSurface::Update() () from /opt/opencascade/lib/libTKBRep.so.0
#5  0x00007fff709694e1 in BRep_Builder::UpdateEdge(TopoDS_Edge const&, Handle_Geom2d_Curve const&, Handle_Geom_Surface const&, TopLoc_Location const&, double) const () from /opt/opencascade/lib/libTKBRep.so.0
#6  0x00007fff70996374 in BRepTools_ShapeSet::ReadGeometry(TopAbs_ShapeEnum, std::istream&, TopoDS_Shape&) () from /opt/opencascade/lib/libTKBRep.so.0
#7  0x00007fff709bc13f in TopTools_ShapeSet::Read(std::istream&) () from /opt/opencascade/lib/libTKBRep.so.0
#8  0x00007fff70983dd7 in BRepTools::Read(TopoDS_Shape&, char const*, BRep_Builder const&, Handle_Message_ProgressIndicator const&) () from /opt/opencascade/lib/libTKBRep.so.0
#9  0x00007fff73a1beb3 in Part::PropertyPartShape::RestoreDocFile(Base::Reader&) () from /usr/lib/freecad/Part.so
#10 0x00007ffff6a68f6d in Base::XMLReader::readFiles(zipios::ZipInputStream&) const () from /usr/lib/freecad/libFreeCADBase.so
#11 0x00007ffff6dd804d in App::Document::restore() () from /usr/lib/freecad/libFreeCADApp.so
#12 0x00007ffff6eace55 in App::Application::openDocument(char const*) () from /usr/lib/freecad/libFreeCADApp.so
#13 0x00007ffff6ead17a in App::Application::processFiles(std::__cxx11::list<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&) () from /usr/lib/freecad/libFreeCADApp.so
#14 0x00007ffff6ead869 in App::Application::processCmdLineFiles() () from /usr/lib/freecad/libFreeCADApp.so
#15 0x00007ffff76b8b13 in Gui::MainWindow::delayedStartup() () from /usr/lib/freecad/libFreeCADGui.so
#16 0x00007ffff76b9ed5 in ?? () from /usr/lib/freecad/libFreeCADGui.so
#17 0x00007ffff5516331 in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#18 0x00007ffff5ac0f9c in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#19 0x00007ffff5ea12f3 in QMainWindow::event(QEvent*) () from /usr/lib/libQtGui.so.4
#20 0x00007ffff76bde71 in Gui::MainWindow::event(QEvent*) () from /usr/lib/freecad/libFreeCADGui.so
#21 0x00007ffff5a6a2dc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#22 0x00007ffff5a71136 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#23 0x00007ffff7448837 in Gui::GUIApplication::notify(QObject*, QEvent*) () from /usr/lib/freecad/libFreeCADGui.so
#24 0x00007ffff54fc4dd in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#25 0x00007ffff54ff966 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQtCore.so.4
#26 0x00007ffff552c6ce in ?? () from /usr/lib/libQtCore.so.4
#27 0x00007fffee8bce67 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#28 0x00007fffee8bd0d0 in ?? () from /usr/lib/libglib-2.0.so.0
#29 0x00007fffee8bd17c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#30 0x00007ffff552c83e in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#31 0x00007ffff5b13336 in ?? () from /usr/lib/libQtGui.so.4
#32 0x00007ffff54fad51 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#33 0x00007ffff54fb0c5 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#34 0x00007ffff5500a69 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#35 0x00007ffff740097c in Gui::Application::runApplication() () from /usr/lib/freecad/libFreeCADGui.so
#36 0x000000000040303a in main ()