Memory leak in gdbus-codegen generated code

["Norman, Anders" <Anders Norman barco com>]

I have an interface described in DBus Introspection XML format:

    <!DOCTYPE node PUBLIC "-//freedesktop//DTD D-BUS Object Introspection 1.0//EN"
                          "http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd";>
    <node>
      <interface name="com.example.foo">
        <method name="Bar" />
      </interface>
    </node>

I run gdbus-codegen like this:

    gdbus-codegen --interface-prefix=com.example --generate-c-code=foo-dbus --c-namespace=Dbus foo.xml

I use the code like this:

    int main()
    {
        DbusFoo * skeleton = dbus_foo_skeleton_new();
        g_object_unref(skeleton);

        return 0;
    }

But the application ends up leaking the signal generated in `dbus_foo_default_init()` which looks like this:

    static void
    dbus_foo_default_init (DbusFooIface *iface)
    {
      /* GObject signals for incoming D-Bus method calls: */
      /**
       * DbusFoo::handle-bar:
       * @object: A #DbusFoo.
       * @invocation: A #GDBusMethodInvocation.
       *
       * Signal emitted when a remote caller is invoking the <link 
linkend="gdbus-method-com-example-foo.Bar">Bar()</link> D-Bus method.
       *
       * If a signal handler returns %TRUE, it means the signal handler will handle the invocation (e.g. take 
a reference to @invocation and eventually call dbus_foo_complete_bar() or e.g. 
g_dbus_method_invocation_return_error() on it) and no order signal handlers will run. If no signal handler 
handles the invocation, the %G_DBUS_ERROR_UNKNOWN_METHOD error is returned.
       *
       * Returns: %TRUE if the invocation was handled, %FALSE to let other signal handlers run.
       */
      g_signal_new ("handle-bar",
        G_TYPE_FROM_INTERFACE (iface),
        G_SIGNAL_RUN_LAST,
        G_STRUCT_OFFSET (DbusFooIface, handle_bar),
        g_signal_accumulator_true_handled,
        NULL,
        g_cclosure_marshal_generic,
        G_TYPE_BOOLEAN,
        1,
        G_TYPE_DBUS_METHOD_INVOCATION);

    }

Am I using the generated code wrong or is it a bug in glib/gdbus-codegen?

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