(gdb) bt
#0  0x00007f685e2ffc70 in raise () from /usr/lib/libpthread.so.0
#1  <signal handler called>
#2  0x00007f6850d19da9 in QWindow::geometry() const () from /usr/lib/libQt5Gui.so.5
#3  0x00007f6850d1d7a7 in ?? () from /usr/lib/libQt5Gui.so.5
#4  0x00007f685252544b in ?? () from /usr/lib/libQt5Qml.so.5
#5  0x00007f6852526508 in QV4::QObjectWrapper::getQmlProperty(QQmlContextData*, QV4::String*, QV4::QObjectWrapper::RevisionMode, bool*, bool) const ()
   from /usr/lib/libQt5Qml.so.5
#6  0x00007f6852543f48 in QV4::Runtime::method_loadProperty(QV4::ExecutionEngine*, QV4::Value const&, int) () from /usr/lib/libQt5Qml.so.5
#7  0x00007f6852537a21 in ?? () from /usr/lib/libQt5Qml.so.5
#8  0x00007f68525f3fb6 in QQmlJavaScriptExpression::evaluate(QV4::CallData*, bool*) () from /usr/lib/libQt5Qml.so.5
#9  0x00007f68525f4646 in QQmlJavaScriptExpression::evaluate(bool*) () from /usr/lib/libQt5Qml.so.5
#10 0x00007f68525fd523 in ?? () from /usr/lib/libQt5Qml.so.5
#11 0x00007f68525fa053 in QQmlBinding::update(QFlags<QQmlPropertyData::WriteFlag>) () from /usr/lib/libQt5Qml.so.5
#12 0x00007f6852606d9c in QQmlObjectCreator::finalize(QQmlInstantiationInterrupt&) () from /usr/lib/libQt5Qml.so.5
#13 0x00007f685257869f in QQmlComponentPrivate::complete(QQmlEnginePrivate*, QQmlComponentPrivate::ConstructionState*) () from /usr/lib/libQt5Qml.so.5
#14 0x00007f68525787c0 in QQmlComponentPrivate::completeCreate() () from /usr/lib/libQt5Qml.so.5
#15 0x00007f6852578594 in QQmlComponent::create(QQmlContext*) () from /usr/lib/libQt5Qml.so.5
#16 0x00007f68525ff21b in QQmlApplicationEnginePrivate::finishLoad(QQmlComponent*) () from /usr/lib/libQt5Qml.so.5
#17 0x00007f68525ff499 in QQmlApplicationEnginePrivate::startLoad(QUrl const&, QByteArray const&, bool) () from /usr/lib/libQt5Qml.so.5
#18 0x00007f68525ff69d in QQmlApplicationEngine::load(QString const&) () from /usr/lib/libQt5Qml.so.5
#19 0x00007f68529a30c1 in ?? () from /usr/lib/python3.6/site-packages/PyQt5/QtQml.so
#20 0x00007f685db38ad0 in _PyCFunction_FastCallDict () from /usr/lib/libpython3.6m.so.1.0
#21 0x00007f685db5ed1b in ?? () from /usr/lib/libpython3.6m.so.1.0
#22 0x00007f685daf2b5a in _PyEval_EvalFrameDefault () from /usr/lib/libpython3.6m.so.1.0
#23 0x00007f685db5e85b in ?? () from /usr/lib/libpython3.6m.so.1.0
#24 0x00007f685db5edde in ?? () from /usr/lib/libpython3.6m.so.1.0
#25 0x00007f685daf2b5a in _PyEval_EvalFrameDefault () from /usr/lib/libpython3.6m.so.1.0
#26 0x00007f685db5e85b in ?? () from /usr/lib/libpython3.6m.so.1.0
#27 0x00007f685db5edde in ?? () from /usr/lib/libpython3.6m.so.1.0
#28 0x00007f685daf2b5a in _PyEval_EvalFrameDefault () from /usr/lib/libpython3.6m.so.1.0
#29 0x00007f685db5f2c8 in PyEval_EvalCodeEx () from /usr/lib/libpython3.6m.so.1.0
#30 0x00007f685daf26ec in PyEval_EvalCode () from /usr/lib/libpython3.6m.so.1.0