Public bug reported:

I ran into some errors while trying out the CellRendererSpin example in the 
documentation:
http://readthedocs.org/docs/python-gtk-3-tutorial/en/latest/cellrenderers.html#Gtk.CellRendererSpin

I click a few times on a CellRendererSpin area until the spinbuttons
show up and the value text is highlighted.  Then I click to select a
different CellRendererSpin.  It doesn't seem 100% consistent every time,
but after two or three tries going back and forth, I receive some errors
on the console and eventually segfault.  Sometimes I get no errors
before it segfaults, or only one of the two shown below.

Configuration:
Ubuntu 11.10 64 bit
Python 2.7.2+
python-gobject 3.0.0-0ubuntu4
Gnome 3 Shell
Lenovo Thinkpad W510 
VGA compatible controller: nVidia Corporation GT216 [Quadro FX 880M] (rev a2)

Console output:
/usr/lib/python2.7/dist-packages/gi/types.py:43: Warning: g_object_notify: 
assertion `G_IS_OBJECT (object)' failed
  return info.invoke(*args, **kwargs)
/usr/lib/python2.7/dist-packages/gi/types.py:43: Warning: g_object_notify: 
object class `GtkStyleContext' has no property named `accessible-value'
  return info.invoke(*args, **kwargs)
Segmentation fault


------------------
(program exited with code: 139)
Press return to continue

** Affects: pygobject (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/908889

Title:
  Errors and segfaults when selecting CellRendererSpin

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