Qt vs D-Bus: access to properties with dash in name

For properties without dash you should simple use:

QDBusInterface *iface = new QDBusInterface(service, path, interface, bus);
if (iface) {
    if (iface->isValid()) {
        int s = iface->property("property_name").toInt();
    }
    delete iface;
}

But if property name contains dash, you must use different approach:

QDBusInterface *iface = new QDBusInterface(service,
                              path,
                              "org.freedesktop.DBus.Properties",
                              bus);
if (iface) {
    if (iface->isValid()) {
        QDBusReply< QVariant> r = iface->call("Get",
                              interface,
                              "property-with-dash-in-name");
        int s = r.value().toInt();
    }
    delete iface;
}

Service, path, bus, interface are same for both examples. See bug #20948 on bugs.freedesktop.org.