If you try to fetch objects using DBus message bus on registered application connections they work fine as demonstrated here: https://live.gnome.org/Vala/DBusServerSample#Debugging_D-Bus_Applications

But when you try to do the same using 1-1 DBusConnections, you get errors fetching objects like the following spurred compiling the attached example.



 valac --pkg=gio-2.0 --pkg=telepathy-glib test-tube-app.vala
test-tube-app.vala:89.51-89.87: error: cannot infer generic type argument for type parameter `GLib.DBusConnection.get_proxy.T'
                    close_object = (RemoteObject) conn.get_proxy<RemoteObjectIface>.end (res);
                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
test-tube-app.vala:85.9-85.47: error: cannot infer generic type argument for type parameter `GLib.DBusConnection.get_proxy.T'
        conn.get_proxy<RemoteObjectIface>.begin (null, "/org/freedesktop/Telepathy/Client/RemoteGame/OfferedObject", 0, null,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Compilation failed: 2 error(s), 0 warning(s)