unexpected segfault removing elements

uncomment the #self.drawables.remove() line blow to get the nice crash, this is using HEAD as of 4/4

#!/usr/bin/python
import goocanvas
import gtk

class Stack(goocanvas.Group):
    cards = []
    drawables = None
    def __init__(self, root):
 self.drawables = goocanvas.Group(parent = root)
    def append(self, card):
 self.cards.append(card)
 card.parent = self
 for x in self.cards:
     x.draw(self.drawables)
 #self.drawables.remove()

class Card:
    width = 200
    height = 300
    border = 12
    border_color = "gray"
    background_color = "tan"
    backside_color = "brown"
    flipped = False
    title = None
    drawables = None
    def __init__(self, title = None):
 self.title = title
    def draw(self, root):
 self.drawables = goocanvas.Group(parent = root)
 goocanvas.Rect (parent = self.drawables, x = 0, y = 0, width = self.width, height = self.height, fill_color = self.border_color)
 if self.flipped:
  goocanvas.Rect (parent = self.drawables, x = self.border, y = self.border, width = self.width - (2 * self.border), height = self.height - (2 * self.border), fill_color = self.backside_color)
 else:
  goocanvas.Rect (parent = self.drawables, x = self.border, y = self.border, width = self.width - (2 * self.border), height = self.height - (2 * self.border), fill_color = self.background_color)
  if self.title is not None: text = goocanvas.Text(parent = self.drawables, text = self.title, x = self.border * 1.5, y = self.border * 1.5)
def setup_canvas (canvas):

    root = canvas.get_root_item ()

    s = Stack(root)
    for i in range(10):
     s.append(Card(title = "TEST " + str(i)))

def create_card_page ():
    vbox = gtk.VBox (False, 4)
    vbox.set_border_width (4)

    hbox = gtk.HBox (False, 4)
    vbox.pack_start (hbox, False, False, 0)

    scrolled_win = gtk.ScrolledWindow ()
    scrolled_win.set_shadow_type (gtk.SHADOW_IN)

    vbox.add (scrolled_win)

    canvas = goocanvas.Canvas ()
    canvas.set_size_request (600, 450)
    canvas.set_bounds (0, 0, 1000, 1000)

    scrolled_win.add (canvas)

    setup_canvas (canvas)

    return vbox

def main ():
    v = create_card_page ()

    w = gtk.Window()
    w.connect("destroy", gtk.main_quit)
    w.add(v)
    w.show_all()

    gtk.main()

if __name__ == "__main__":
    main()