Hi, Here is a stacktrace of the crash:
(gdb) bt
#0 0x00007fffeee0f1e5 in __GI_raise (sig=sig@entry=6) at
../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1 0x00007fffeee12398 in __GI_abort () at abort.c:90
#2 0x00007fffeee08272 in __assert_fail_base (fmt=0x7fffeef45900 "%s%s%s:%u:
%s%sAssertion `%s' failed.\n%n",
assertion=assertion@entry=0x7ffff55a9668 "copiedinstances",
file=file@entry=0x7ffff55a9600 "SoFieldContainer.cpp", line=line@entry=888,
function=function@entry=0x7ffff55a9a00 "static SoFieldContainer*
SoFieldContainer::checkCopy(const SoFieldContainer*)") at assert.c:92
#3 0x00007fffeee08322 in __GI___assert_fail (assertion=0x7ffff55a9668
"copiedinstances", file=0x7ffff55a9600 "SoFieldContainer.cpp", line=888,
function=0x7ffff55a9a00 "static SoFieldContainer*
SoFieldContainer::checkCopy(const SoFieldContainer*)") at assert.c:101
#4 0x00007ffff5228a24 in SoFieldContainer::checkCopy(SoFieldContainer const*)
() from /usr/lib/x86_64-linux-gnu/libCoin.so.80
#5 0x00007ffff538a3c0 in SoNode::addToCopyDict() const () from
/usr/lib/x86_64-linux-gnu/libCoin.so.80
#6 0x00007ffff4c4fe86 in SoQtViewer::setSceneGraph(SoNode*) () from
/usr/lib/libSoQt4.so.20
#7 0x00007ffff77c2e0e in Gui::View3DInventorViewer::setSceneGraph(SoNode*) ()
from /usr/lib/freecad/lib/libFreeCADGui.so
#8 0x00007ffff77c36c7 in
Gui::View3DInventorViewer::View3DInventorViewer(QWidget*, char const*, int,
SoQtViewer::Type, int) ()
from /usr/lib/freecad/lib/libFreeCADGui.so
#9 0x00007ffff77bb1ad in Gui::View3DInventor::View3DInventor(Gui::Document*,
QWidget*, QFlags<Qt::WindowType>) () from /usr/lib/freecad/lib/libFreeCADGui.so
#10 0x00007ffff76357be in Gui::Document::createView(char const*) () from
/usr/lib/freecad/lib/libFreeCADGui.so
#11 0x00007ffff761f263 in Gui::Application::slotNewDocument(App::Document
const&) () from /usr/lib/freecad/lib/libFreeCADGui.so
#12 0x00007ffff710942f in boost::signal1<void, App::Document const&,
boost::last_value<void>, int, std::less<int>, boost::function<void
(App::Document const&)> >::operator()(App::Document const&) () from
/usr/lib/freecad/lib/libFreeCADApp.so
#13 0x00007ffff7167b34 in App::Application::newDocument(char const*, char
const*) () from /usr/lib/freecad/lib/libFreeCADApp.so
#14 0x00007ffff7178a20 in App::Application::sNewDocument(_object*, _object*,
_object*) () from /usr/lib/freecad/lib/libFreeCADApp.so
#15 0x00007ffff69a6702 in PyEval_EvalFrameEx () from
/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0
#16 0x00007ffff68e7142 in PyEval_EvalCodeEx () from
/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0
#17 0x00007ffff68e7472 in PyEval_EvalCode () from
/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0
#18 0x00007ffff68e750d in PyRun_StringFlags () from
/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0
#19 0x00007ffff6dd1273 in Base::InterpreterSingleton::runString(char const*) ()
from /usr/lib/freecad/lib/libFreeCADBase.so
#20 0x00007ffff76631ae in Gui::Command::doCommand(Gui::Command::DoCmd_Type,
char const*, ...) () from /usr/lib/freecad/lib/libFreeCADGui.so
#21 0x00007ffff7662c9c in Gui::Command::invoke(int) () from
/usr/lib/freecad/lib/libFreeCADGui.so
#22 0x00007ffff0f78cf8 in QMetaObject::activate(QObject*, QMetaObject const*,
int, void**) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#23 0x00007ffff1a195b2 in QAction::triggered(bool) () from
/usr/lib/x86_64-linux-gnu/libQtGui.so.4
#24 0x00007ffff1a1af83 in QAction::activate(QAction::ActionEvent) () from
/usr/lib/x86_64-linux-gnu/libQtGui.so.4
#25 0x00007ffff1dce432 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#26 0x00007ffff1dce55c in QAbstractButton::mouseReleaseEvent(QMouseEvent*) ()
from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#27 0x00007ffff1e853ea in QToolButton::mouseReleaseEvent(QMouseEvent*) () from
/usr/lib/x86_64-linux-gnu/libQtGui.so.4
#28 0x00007ffff1a6ed0e in QWidget::event(QEvent*) () from
/usr/lib/x86_64-linux-gnu/libQtGui.so.4
#29 0x00007ffff1a1f70c in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
---Type <return> to continue, or q <return> to quit---
#30 0x00007ffff1a25ebd in QApplication::notify(QObject*, QEvent*) () from
/usr/lib/x86_64-linux-gnu/libQtGui.so.4
#31 0x00007ffff762b66f in Gui::GUIApplication::notify(QObject*, QEvent*) ()
from /usr/lib/freecad/lib/libFreeCADGui.so
#32 0x00007ffff0f64b5d in QCoreApplication::notifyInternal(QObject*, QEvent*)
() from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#33 0x00007ffff1a25673 in QApplicationPrivate::sendMouseEvent(QWidget*,
QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) ()
from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#34 0x00007ffff1a973cb in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#35 0x00007ffff1a95e3c in QApplication::x11ProcessEvent(_XEvent*) () from
/usr/lib/x86_64-linux-gnu/libQtGui.so.4
#36 0x00007ffff1abd792 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#37 0x00007fffea264ea6 in g_main_dispatch (context=0x726300) at
/tmp/buildd/glib2.0-2.36.3/./glib/gmain.c:3054
#38 g_main_context_dispatch (context=context@entry=0x726300) at
/tmp/buildd/glib2.0-2.36.3/./glib/gmain.c:3630
#39 0x00007fffea2651f8 in g_main_context_iterate
(context=context@entry=0x726300, block=block@entry=1,
dispatch=dispatch@entry=1, self=<optimized out>)
at /tmp/buildd/glib2.0-2.36.3/./glib/gmain.c:3701
#40 0x00007fffea26529c in g_main_context_iteration (context=0x726300,
may_block=1) at /tmp/buildd/glib2.0-2.36.3/./glib/gmain.c:3762
#41 0x00007ffff0f91ce5 in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#42 0x00007ffff1abd846 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#43 0x00007ffff0f637bf in
QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/x86_64-linux-gnu/libQtCore.so.4
#44 0x00007ffff0f63ab5 in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/x86_64-linux-gnu/libQtCore.so.4
#45 0x00007ffff0f690fb in QCoreApplication::exec() () from
/usr/lib/x86_64-linux-gnu/libQtCore.so.4
#46 0x00007ffff76230b3 in Gui::Application::runApplication() () from
/usr/lib/freecad/lib/libFreeCADGui.so
#47 0x00000000004043d3 in main ()
-- Sebastian
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