gjs and Gdk.cairo_create()

["Youry Harchenko" <youry ukr net>]

Hello!

There is gjs-script:

const Gtk = imports.gi.Gtk;
const Gdk = imports.gi.Gdk;

function draw(obj, event) {
    let cr = Gdk.cairo_create(obj.window);
}

Gtk.init(null, null);

let win = new Gtk.Window({type: Gtk.WindowType.TOPLEVEL, title: "Test"});
win.connect("destroy", Gtk.main_quit);

let da = new Gtk.DrawingArea();
da.connect("expose_event", draw);

win.add(da);

win.show_all();

Gtk.main();

Here is the result of the script :

    JS ERROR: !!!   Exception was: Error: No exception was set, but object construction failed somehow
    JS ERROR: !!!     lineNumber = '0'
    JS ERROR: !!!     fileName = 'gjs_throw'
    JS ERROR: !!!     message = 'No exception was set, but object construction failed somehow'
    JS ERROR: !!!     stack = 'Error("No exception was set, but object construction failed somehow")@:0
("No exception was set, but object construction failed somehow")@gjs_throw:0
@:0
draw([object _private_Gtk_DrawingArea],[object _private_Gdk_Event])@test.js:5
Error("Chained exception")@:0
("Chained exception")@gjs_throw:0
'

What is the reason?

I used:

Linux Mandriva 2010.1 x86-64
gjs  0.6
gobject-introspection 0.6.10
gir-repository 0.6.5
gtk 2.20.1
cairo 1.9.6

With best regards, Youry Harchenko