App exits with extra param - bug or feature?

[Фамилия Имя <kangaba yandex ru>]

Hi,

If I add the param "Gio::APPLICATION_HANDLES_COMMAND_LINE" to Gtk::Application it exits automatically.
Is it a bug or feature?
Simple sample:

#include <gtkmm.h>

int
main(int argc, char *argv[]) {
	Glib::RefPtr<Gtk::Application> app = Gtk::Application::create(argc, argv,
	"org.app.com");//, Gio::APPLICATION_HANDLES_COMMAND_LINE);
	Gtk::Window win;
	win.show_all();
	app->run(win);
	return 0;
}

It compiles and runs fine, however if you add/uncomment the Gio::APPLICATION_HANDLES_COMMAND_LINE param
to the app it will compile fine but the executable execute past app->run(win) and just exit.

It happens on Ubuntu 12.10 amd64 which ships with libgtkmm-3.0-dev version  3.5.13-0ubuntu1

On Ubuntu 12.04 I don't have this subtle issue, however it complains if I don't add this param yet access the param list later on.