QDeclarativeEngineDebugServer asserts for non-serializable list

import QtQuick 1.0

Item {
    property variant varList : [] // will be list of QDeclarativeItem*

    Item {
        id: item
    }

    Component.onCompleted: {
        var list = varList;
        list[0] = item;
        varList = list;
    }
}

0	raise	/lib64/libc.so.6	0	0x7ffff38959e5	
1	abort	/lib64/libc.so.6	0	0x7ffff3896ee6	
2	qt_message_output	qglobal.cpp	2282	0x7ffff4b5c288	
3	qt_message(QtMsgType, const char *, typedef __va_list_tag __va_list_tag *)	qglobal.cpp	2328	0x7ffff4b5c404	
4	qFatal	qglobal.cpp	2511	0x7ffff4b5cc72	
5	qt_assert_x	qglobal.cpp	2035	0x7ffff4b5be7b	
6	QVariant::save	qvariant.cpp	2035	0x7ffff4cb3d9c	
7	operator<<	qvariant.cpp	2062	0x7ffff4cb3e45	
8	operator<< <QVariant>	qdatastream.h	263	0x7ffff4c97064	
9	QMetaType::save	qmetatype.cpp	689	0x7ffff4c94de4	
10	QVariant::save	qvariant.cpp	2034	0x7ffff4cb3d76	
11	operator<<	qvariant.cpp	2062	0x7ffff4cb3e45	
12	operator<<	qdeclarativeenginedebug.cpp	96	0x7ffff79d30bc	
13	QDeclarativeEngineDebugServer::buildObjectDump	qdeclarativeenginedebug.cpp	253	0x7ffff79d3f24	
14	QDeclarativeEngineDebugServer::messageReceived	qdeclarativeenginedebug.cpp	441	0x7ffff79d4f5e	
15	QDeclarativeDebugServer::receiveMessage	qdeclarativedebugserver.cpp	298	0x7ffff7a73f9c	
16	QTcpServerConnection::readyRead	qtcpserverconnection.cpp	149	0x7fffecafd384	
17	QTcpServerConnection::qt_metacall	moc_qtcpserverconnection.cpp	78	0x7fffecafd8f7	
18	QMetaObject::metacall	qmetaobject.cpp	237	0x7ffff4c8e0bf	
19	QMetaObject::activate	qobject.cpp	3278	0x7ffff4ca319b	
20	QPacketProtocol::readyRead	moc_qpacketprotocol_p.cpp	88	0x7ffff7a94ddd