#0  0x00007fb21b6ed755 in raise () at /usr/lib/libc.so.6
#1  0x00007fb21b6ed7e0 in <signal handler called> () at /usr/lib/libc.so.6
#2  0x0000000000000000 in  ()
#3  0x00007fb2175006ca in QMetaObject::cast(QObject const*) const () at /usr/lib/libQt5Core.so.5
#4  0x00007fb2116b0232 in QQuickOpenGLShaderEffectCommon::disconnectPropertySignals(QQuickItem*, QQuickOpenGLShaderEffectMaterialKey::ShaderType) () at /usr/lib/libQt5Quick.so.5
#5  0x00007fb2116b331d in QQuickOpenGLShaderEffect::~QQuickOpenGLShaderEffect() () at /usr/lib/libQt5Quick.so.5
#6  0x00007fb2116b33da in QQuickOpenGLShaderEffect::~QQuickOpenGLShaderEffect() () at /usr/lib/libQt5Quick.so.5
#7  0x00007fb21752175e in QObjectPrivate::deleteChildren() () at /usr/lib/libQt5Core.so.5
#8  0x00007fb21752bba8 in QObject::~QObject() () at /usr/lib/libQt5Core.so.5
#9  0x00007fb21157306a in QQuickItem::~QQuickItem() () at /usr/lib/libQt5Quick.so.5
#10 0x00007fb211595e70 in  () at /usr/lib/libQt5Quick.so.5
#11 0x00007fb21752175e in QObjectPrivate::deleteChildren() () at /usr/lib/libQt5Core.so.5
#12 0x00007fb21752bba8 in QObject::~QObject() () at /usr/lib/libQt5Core.so.5
#13 0x00007fb21157306a in QQuickItem::~QQuickItem() () at /usr/lib/libQt5Quick.so.5
#14 0x00007fb211596067 in  () at /usr/lib/libQt5Quick.so.5
#15 0x00007fb21752175e in QObjectPrivate::deleteChildren() () at /usr/lib/libQt5Core.so.5
#16 0x00007fb21752bba8 in QObject::~QObject() () at /usr/lib/libQt5Core.so.5
#17 0x00007fb21157306a in QQuickItem::~QQuickItem() () at /usr/lib/libQt5Quick.so.5
#18 0x00007fb1b5401ab7 in  () at /usr/lib/qt/qml/QtQuick/Templates.2/libqtquicktemplates2plugin.so
#19 0x00007fb21752175e in QObjectPrivate::deleteChildren() () at /usr/lib/libQt5Core.so.5
#20 0x00007fb21752bba8 in QObject::~QObject() () at /usr/lib/libQt5Core.so.5
#21 0x00007fb21157306a in QQuickItem::~QQuickItem() () at /usr/lib/libQt5Quick.so.5
#22 0x00007fb1b53ff3b0 in  () at /usr/lib/qt/qml/QtQuick/Templates.2/libqtquicktemplates2plugin.so
#23 0x00007fb217524261 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#24 0x00007fb211570e46 in QQuickItem::event(QEvent*) () at /usr/lib/libQt5Quick.so.5
#25 0x00007fb2137bf4d5 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#26 0x00007fb2137c8a21 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#27 0x00007fb213ed0bbf in  () at /usr/lib/python3.7/site-packages/PyQt5/QtWidgets.so
#28 0x00007fb2174f79c2 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#29 0x00007fb2174fa739 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#30 0x00007fb2175503a4 in  () at /usr/lib/libQt5Core.so.5
#31 0x00007fb216b19cf4 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#32 0x00007fb216b1bb11 in  () at /usr/lib/libglib-2.0.so.0
#33 0x00007fb216b1bb51 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#34 0x00007fb21754f9a3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#35 0x00007fb2174f65ec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#36 0x00007fb2174fe326 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#37 0x00007fb213ecf64f in  () at /usr/lib/python3.7/site-packages/PyQt5/QtWidgets.so
#38 0x00007fb21b470fa5 in PyCFunction_Call () at /usr/lib/libpython3.7m.so.1.0
#39 0x00007fb21b4ec902 in _PyEval_EvalFrameDefault () at /usr/lib/libpython3.7m.so.1.0
#40 0x00007fb21b495d18 in _PyEval_EvalCodeWithName () at /usr/lib/libpython3.7m.so.1.0
#41 0x00007fb21b496da3 in _PyFunction_FastCallKeywords () at /usr/lib/libpython3.7m.so.1.0
#42 0x00007fb21b4a9c30 in  () at /usr/lib/libpython3.7m.so.1.0
#43 0x00007fb21b4eb6b2 in _PyEval_EvalFrameDefault () at /usr/lib/libpython3.7m.so.1.0
#44 0x00007fb21b495d18 in _PyEval_EvalCodeWithName () at /usr/lib/libpython3.7m.so.1.0
#45 0x00007fb21b496da3 in _PyFunction_FastCallKeywords () at /usr/lib/libpython3.7m.so.1.0
#46 0x00007fb21b4a9c30 in  () at /usr/lib/libpython3.7m.so.1.0
#47 0x00007fb21b4eb6b2 in _PyEval_EvalFrameDefault () at /usr/lib/libpython3.7m.so.1.0
#48 0x00007fb21b495d18 in _PyEval_EvalCodeWithName () at /usr/lib/libpython3.7m.so.1.0
#49 0x00007fb21b496aca in PyEval_EvalCodeEx () at /usr/lib/libpython3.7m.so.1.0
#50 0x00007fb21b496aec in PyEval_EvalCode () at /usr/lib/libpython3.7m.so.1.0
#51 0x00007fb21b5678a5 in  () at /usr/lib/libpython3.7m.so.1.0
#52 0x00007fb21b567c2b in PyRun_FileExFlags () at /usr/lib/libpython3.7m.so.1.0
#53 0x00007fb21b56dec7 in PyRun_SimpleFileExFlags () at /usr/lib/libpython3.7m.so.1.0
#54 0x00007fb21b570022 in  () at /usr/lib/libpython3.7m.so.1.0
#55 0x00007fb21b5701cc in _Py_UnixMain () at /usr/lib/libpython3.7m.so.1.0
#56 0x00007fb21b6d9ee3 in __libc_start_main () at /usr/lib/libc.so.6
#57 0x000055e8573cc05e in _start ()