Qml Debugger crashes application due to Qml objects created by debugger thread

QQmlEngine: Illegal attempt to connect to QQuickAnchors(0x156b1efa0) that is in a different thread than the QML engine QQmlEngine(0x105f5cf10.

1	__pthread_kill			0x7fff93f77002	
2	pthread_kill			0x7fff99cf45c5	
3	abort			0x7fff91eab6e7	
4	qt_message_fatal(QtMsgType, QMessageLogContext const&, QString const&)	qlogging.cpp	1610	0x1026dbb68	
5	QMessageLogger::fatal(const char *, ...) const	qlogging.cpp	784	0x1026dde8e	
6	QQmlNotifierEndpoint::connect(QObject *, int, QQmlEngine *)	qqmlnotifier.cpp	123	0x1055190e8	
7	QQmlPropertyCapture::captureProperty(QObject *, int, int)	qqmljavascriptexpression.cpp	283	0x10553ed2f	
8	QV4::QObjectWrapper::getProperty(QV4::ExecutionEngine *, QObject *, QQmlPropertyData *, bool)	qv4qobjectwrapper.cpp	369	0x10543f852	
9	QV4::QObjectWrapper::getQmlProperty(QQmlContextData *, QV4::String *, QV4::QObjectWrapper::RevisionMode, bool *, bool) const	qv4qobjectwrapper.cpp	318	0x10543f34e	
10	QV4::QObjectWrapper::get(QV4::Managed const *, QV4::String *, bool *)	qv4qobjectwrapper.cpp	681	0x105443531	
11	QV4::Object::get(QV4::String *, bool *) const	qv4object_p.h	298	0x1052cd2a1	
12	QV4::QObjectWrapper::advanceIterator(QV4::Managed *, QV4::ObjectIterator *, QV4::Value *, unsigned int *, QV4::Property *, QV4::PropertyAttributes *)	qv4qobjectwrapper.cpp	743	0x105443b1d	
13	QV4::Object::advanceIterator(QV4::ObjectIterator *, QV4::Value *, unsigned int *, QV4::Property *, QV4::PropertyAttributes *)	qv4object_p.h	318	0x1053f140c	
14	QV4::ObjectIterator::next(QV4::Value *, unsigned int *, QV4::Property *, QV4::PropertyAttributes *)	qv4objectiterator.cpp	100	0x1053f0a0d	
15	collectProperty(QV4::ScopedValue const&, QV4::ExecutionEngine *, QJsonObject&)	qv4datacollector.cpp	148	0x11341a8db	
16	QV4DataCollector::collectAsJson(QString const&, QV4::ScopedValue const&)	qv4datacollector.cpp	323	0x11341c058	
17	QV4DataCollector::collectProperties(QV4::Object const *)	qv4datacollector.cpp	305	0x11341b281	
18	QV4DataCollector::lookupRef(unsigned int)	qv4datacollector.cpp	180	0x11341ae66	
19	(anonymous namespace)::V8EvaluateRequest::handleRequest()	qv4debugservice.cpp	570	0x11340ec78	
20	V8CommandHandler::handle(QJsonObject const&, QV4DebugServiceImpl *)	qv4debugservice.cpp	89	0x11340f989	
21	QV4DebugServiceImpl::handleV8Request(QByteArray const&)	qv4debugservice.cpp	758	0x113408c63	
22	QV4DebugServiceImpl::messageReceived(QByteArray const&)	qv4debugservice.cpp	728	0x113408791	
23	QQmlDebugServerImpl::receiveMessage()	qqmldebugserver.cpp	482	0x1133acd57	
24	QQmlDebugServerImpl::qt_static_metacall(QObject *, QMetaObject::Call, int, void * *)	qqmldebugserver.moc	106	0x1133ae2cd	
25	QMetaObject::activate(QObject *, int, int, void * *)	qobject.cpp	3730	0x102a0f88b	
26	QMetaObject::activate(QObject *, QMetaObject const *, int, void * *)	qobject.cpp	3595	0x102a0eced	
27	QPacketProtocol::readyRead()	moc_qpacketprotocol.cpp	146	0x1133b9792	
28	QPacketProtocol::qt_static_metacall(QObject *, QMetaObject::Call, int, void * *)	moc_qpacketprotocol.cpp	77	0x1133b962a	
29	QMetaObject::activate(QObject *, int, int, void * *)	qobject.cpp	3730	0x102a0f88b	
30	QMetaObject::activate(QObject *, QMetaObject const *, int, void * *)	qobject.cpp	3595	0x102a0eced	
31	QPacketProtocolPrivate::readyRead()	qpacketprotocol.moc	162	0x1133b6de2	
32	QPacketProtocolPrivate::readyToRead()	qpacketprotocol.cpp	196	0x1133b771a	
33	QPacketProtocolPrivate::qt_static_metacall(QObject *, QMetaObject::Call, int, void * *)	qpacketprotocol.moc	96	0x1133b6c7c	
34	QMetaObject::activate(QObject *, int, int, void * *)	qobject.cpp	3730	0x102a0f88b	
35	QMetaObject::activate(QObject *, QMetaObject const *, int, void * *)	qobject.cpp	3595	0x102a0eced	
36	QIODevice::readyRead()	moc_qiodevice.cpp	156	0x102af54b2	
37	QAbstractSocketPrivate::canReadNotification()	qabstractsocket.cpp	736	0x10432df9e	
38	QAbstractSocketPrivate::readNotification()	qabstractsocket_p.h	69	0x104334875	
39	non-virtual thunk to QAbstractSocketPrivate::readNotification()	qabstractsocket_p.h	69	0x10433492c	
40	QAbstractSocketEngine::readNotification()	qabstractsocketengine.cpp	152	0x10431e0cb	
41	QReadNotifier::event(QEvent *)	qnativesocketengine.cpp	1195	0x10433f55c	
42	QApplicationPrivate::notify_helper(QObject *, QEvent *)	qapplication.cpp	3712	0x10334041e	
43	QApplication::notify(QObject *, QEvent *)	qapplication.cpp	3155	0x1033422d9	
44	QCoreApplication::notifyInternal2(QObject *, QEvent *)	qcoreapplication.cpp	1013	0x1029be5d8	
45	QCoreApplication::sendEvent(QObject *, QEvent *)	qcoreapplication.h	227	0x1029c346c	
46	QEventDispatcherUNIX::activateSocketNotifiers()	qeventdispatcher_unix.cpp	565	0x102a56a8f	
47	QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec *)	qeventdispatcher_unix.cpp	264	0x102a564b5	
48	QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)	qeventdispatcher_unix.cpp	607	0x102a57b94	
49	QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)	qeventloop.cpp	128	0x1029b954a	
50	QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)	qeventloop.cpp	204	0x1029b9766	
51	QThread::exec()	qthread.cpp	503	0x1026f5fe5	
52	QQmlDebugServerThread::run()	qqmldebugserver.cpp	242	0x1133ab426	
53	QThreadPrivate::start(void *)	qthread_unix.cpp	340	0x1027000b1	
54	_pthread_body			0x7fff99cf2c13	
55	_pthread_start			0x7fff99cf2b90	
56	thread_start			0x7fff99cf0375	

QQuickAnchors::QQuickAnchors(QQuickItem *item, QObject *parent)
: QObject(*new QQuickAnchorsPrivate(item), parent)
{
  const bool isGuiThread =
        QThread::currentThread() == QCoreApplication::instance()->thread();

  Q_ASSERT(isGuiThread);
}

1	__pthread_kill			0x7fff93f77002	
2	pthread_kill			0x7fff99cf45c5	
3	__abort			0x7fff91eab787	
4	abort			0x7fff91eab6f6	
5	qt_message_fatal(QtMsgType, QMessageLogContext const&, QString const&)	qlogging.cpp	1610	0x1026dbb68	
6	QMessageLogger::fatal(const char *, ...) const	qlogging.cpp	784	0x1026dde8e	
7	qt_assert(const char *, const char *, int)	qglobal.cpp	3044	0x1026d3e72	
8	QQuickAnchors::QQuickAnchors(QQuickItem *, QObject *)	qquickanchors.cpp	147	0x1047ed5f5	
9	QQuickAnchors::QQuickAnchors(QQuickItem *, QObject *)	qquickanchors.cpp	143	0x1047ed625	
10	QQuickItemPrivate::anchors() const	qquickitem.cpp	3542	0x10480038f	
11	QQuickItem::qt_static_metacall(QObject *, QMetaObject::Call, int, void * *)	moc_qquickitem.cpp	843	0x10480c28d	
12	QQuickItem::qt_metacall(QMetaObject::Call, int, void * *)	moc_qquickitem.cpp	951	0x10480d028	
13	QQuickFocusScope::qt_metacall(QMetaObject::Call, int, void * *)	moc_qquickfocusscope_p.cpp	84	0x104a00624	
14	ReadAccessor::Direct(QObject *, QQmlPropertyData const&, void *, QQmlNotifier * *)	qv4qobjectwrapper.cpp	129	0x10544c67d	
15	unsigned long long LoadProperty<&(ReadAccessor::Direct(QObject *, QQmlPropertyData const&, void *, QQmlNotifier * *))>(QV4::ExecutionEngine *, QObject *, QQmlPropertyData const&, QQmlNotifier * *)	qv4qobjectwrapper.cpp	154	0x105440497	
16	QV4::QObjectWrapper::getProperty(QV4::ExecutionEngine *, QObject *, QQmlPropertyData *, bool)	qv4qobjectwrapper.cpp	376	0x10543f8f3	
17	QV4::QObjectWrapper::getQmlProperty(QQmlContextData *, QV4::String *, QV4::QObjectWrapper::RevisionMode, bool *, bool) const	qv4qobjectwrapper.cpp	318	0x10543f34e	
18	QV4::QObjectWrapper::get(QV4::Managed const *, QV4::String *, bool *)	qv4qobjectwrapper.cpp	681	0x105443531	
19	QV4::Object::get(QV4::String *, bool *) const	qv4object_p.h	298	0x1052cd2a1	
20	QV4::QObjectWrapper::advanceIterator(QV4::Managed *, QV4::ObjectIterator *, QV4::Value *, unsigned int *, QV4::Property *, QV4::PropertyAttributes *)	qv4qobjectwrapper.cpp	743	0x105443b1d	
21	QV4::Object::advanceIterator(QV4::ObjectIterator *, QV4::Value *, unsigned int *, QV4::Property *, QV4::PropertyAttributes *)	qv4object_p.h	318	0x1053f140c	
22	QV4::ObjectIterator::next(QV4::Value *, unsigned int *, QV4::Property *, QV4::PropertyAttributes *)	qv4objectiterator.cpp	100	0x1053f0a0d	
23	collectProperty(QV4::ScopedValue const&, QV4::ExecutionEngine *, QJsonObject&)	qv4datacollector.cpp	148	0x112e318db	
24	QV4DataCollector::lookupRef(unsigned int)	qv4datacollector.cpp	179	0x112e31e2d	
25	(anonymous namespace)::V8EvaluateRequest::handleRequest()	qv4debugservice.cpp	570	0x112e25c78	
26	V8CommandHandler::handle(QJsonObject const&, QV4DebugServiceImpl *)	qv4debugservice.cpp	89	0x112e26989	
27	QV4DebugServiceImpl::handleV8Request(QByteArray const&)	qv4debugservice.cpp	758	0x112e1fc63	
28	QV4DebugServiceImpl::messageReceived(QByteArray const&)	qv4debugservice.cpp	728	0x112e1f791	
29	QQmlDebugServerImpl::receiveMessage()	qqmldebugserver.cpp	482	0x112ca0d57	
30	QQmlDebugServerImpl::qt_static_metacall(QObject *, QMetaObject::Call, int, void * *)	qqmldebugserver.moc	106	0x112ca22cd	
31	QMetaObject::activate(QObject *, int, int, void * *)	qobject.cpp	3730	0x102a0f88b	
32	QMetaObject::activate(QObject *, QMetaObject const *, int, void * *)	qobject.cpp	3595	0x102a0eced	
33	QPacketProtocol::readyRead()	moc_qpacketprotocol.cpp	146	0x112cad792	
34	QPacketProtocol::qt_static_metacall(QObject *, QMetaObject::Call, int, void * *)	moc_qpacketprotocol.cpp	77	0x112cad62a	
35	QMetaObject::activate(QObject *, int, int, void * *)	qobject.cpp	3730	0x102a0f88b	
36	QMetaObject::activate(QObject *, QMetaObject const *, int, void * *)	qobject.cpp	3595	0x102a0eced	
37	QPacketProtocolPrivate::readyRead()	qpacketprotocol.moc	162	0x112caade2	
38	QPacketProtocolPrivate::readyToRead()	qpacketprotocol.cpp	196	0x112cab71a	
39	QPacketProtocolPrivate::qt_static_metacall(QObject *, QMetaObject::Call, int, void * *)	qpacketprotocol.moc	96	0x112caac7c	
40	QMetaObject::activate(QObject *, int, int, void * *)	qobject.cpp	3730	0x102a0f88b	
41	QMetaObject::activate(QObject *, QMetaObject const *, int, void * *)	qobject.cpp	3595	0x102a0eced	
42	QIODevice::readyRead()	moc_qiodevice.cpp	156	0x102af54b2	
43	QAbstractSocketPrivate::canReadNotification()	qabstractsocket.cpp	736	0x10432df9e	
44	QAbstractSocketPrivate::readNotification()	qabstractsocket_p.h	69	0x104334875	
45	non-virtual thunk to QAbstractSocketPrivate::readNotification()	qabstractsocket_p.h	69	0x10433492c	
46	QAbstractSocketEngine::readNotification()	qabstractsocketengine.cpp	152	0x10431e0cb	
47	QReadNotifier::event(QEvent *)	qnativesocketengine.cpp	1195	0x10433f55c	
48	QApplicationPrivate::notify_helper(QObject *, QEvent *)	qapplication.cpp	3712	0x10334041e	
49	QApplication::notify(QObject *, QEvent *)	qapplication.cpp	3155	0x1033422d9	
50	QCoreApplication::notifyInternal2(QObject *, QEvent *)	qcoreapplication.cpp	1013	0x1029be5d8	
51	QCoreApplication::sendEvent(QObject *, QEvent *)	qcoreapplication.h	227	0x1029c346c	
52	QEventDispatcherUNIX::activateSocketNotifiers()	qeventdispatcher_unix.cpp	565	0x102a56a8f	
53	QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec *)	qeventdispatcher_unix.cpp	264	0x102a564b5	
54	QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)	qeventdispatcher_unix.cpp	607	0x102a57b94	
55	QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)	qeventloop.cpp	128	0x1029b954a	
56	QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)	qeventloop.cpp	204	0x1029b9766	
57	QThread::exec()	qthread.cpp	503	0x1026f5fe5	
58	QQmlDebugServerThread::run()	qqmldebugserver.cpp	242	0x112c9f426	
59	QThreadPrivate::start(void *)	qthread_unix.cpp	340	0x1027000b1	
60	_pthread_body			0x7fff99cf2c13	
61	_pthread_start			0x7fff99cf2b90	
62	thread_start			0x7fff99cf0375