duplicated copyrightsChanged signal: one with QString one with QImage

class Q_LOCATION_PRIVATE_EXPORT QDeclarativeGeoMap : public QQuickItem
{
...
Q_SIGNALS:
...
    void copyrightsChanged(const QImage &copyrightsImage);
    void copyrightsChanged(const QString &copyrightsHtml);
...

        connect(mapSource(), SIGNAL(copyrightsChanged(QImage)),
                this, SLOT(copyrightsChanged(QImage)));
        connect(mapSource(), SIGNAL(copyrightsChanged(QString)),
                this, SLOT(copyrightsChanged(QString)));

1   ??                                                                                                       0x7ffff43674dc 
2   raise                                                                                                    0x7ffff4317998 
3   abort                                                                                                    0x7ffff430153d 
4   qAbort                                                                 qglobal.cpp                  2644 0x7ffff4927818 
5   qt_message_fatal                                                       qlogging.cpp                 1916 0x7ffff493733c 
6   QMessageLogger::fatal                                                  qlogging.cpp                 850  0x7ffff49337f2 
7   qt_assert                                                              qassert.cpp                  68   0x7ffff49224ea 
8   checkMethodMetaTypeConsistency                                         qmetaobject.cpp              1800 0x7ffff49ec073 
9   (anonymous namespace)::QMetaMethodPrivate::parameterMetaTypeInterfaces qmetaobject.cpp              1834 0x7ffff49ec21d 
10  QMetaObjectPrivate::methodMatch                                        qmetaobject.cpp              583  0x7ffff49e8920 
11  QMetaObjectPrivate::indexOfMethodRelative<4>                           qmetaobject.cpp              641  0x7ffff49f34ce 
12  QMetaObjectPrivate::indexOfSignalRelative                              qmetaobject.cpp              765  0x7ffff49e93ff 
13  QObject::connect                                                       qobject.cpp                  2885 0x7ffff4a56786 
14  QDeclarativeGeoMap::mappingManagerInitialized                          qdeclarativegeomap.cpp       704  0x7ffff7d9d8e8 
15  QDeclarativeGeoMap::pluginReady                                        qdeclarativegeomap.cpp       424  0x7ffff7d9c044 
16  QDeclarativeGeoMap::setPlugin                                          qdeclarativegeomap.cpp       536  0x7ffff7d9c6a1 
17  QDeclarativeGeoMap::qt_static_metacall                                 moc_qdeclarativegeomap_p.cpp 1315 0x7ffff7c74e26 
18  QDeclarativeGeoMap::qt_metacall                                        moc_qdeclarativegeomap_p.cpp 1370 0x7ffff7c751f9 
19  QQmlVMEMetaObject::metaCall                                            qqmlvmemetaobject.cpp        1085 0x7ffff68a8bb0 
20  QQmlPropertyData::doMetacall<(QMetaObject::Call)2>                     qqmlpropertydata_p.h         321  0x7ffff66777c9 
... <More>