[issue14137] GTK3 Segmentation fault from Warning: g_object_notify: assertion `G_IS_OBJECT (object)' failed

[Narnie Harshoe]

New submission from Narnie Harshoe <signupnarnie at gmail.com>:

Using the following code for a Gtk.CellRenderSpin results in the following error after changing the spin button several times.

The error is:

/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)
Segmentation fault

#! /usr/bin/env python
# -*- coding: utf-8 -*-

from gi.repository import Gtk

class CellRendererSpinWindow(Gtk.Window):

    def __init__(self):
        Gtk.Window.__init__(self, title="CellRendererSpin Example")

        self.set_default_size(200, 200)

        self.liststore = Gtk.ListStore(str, int)
        self.liststore.append(["Oranges", 5])
        self.liststore.append(["Apples", 4])
        self.liststore.append(["Bananas", 2])

        treeview = Gtk.TreeView(model=self.liststore)

        renderer_text = Gtk.CellRendererText()
        column_text = Gtk.TreeViewColumn("Fruit", renderer_text, text=0)
        treeview.append_column(column_text)

        renderer_spin = Gtk.CellRendererSpin()
        renderer_spin.connect("edited", self.on_amount_edited)
        renderer_spin.set_property("editable", True)

        adjustment = Gtk.Adjustment(0, 0, 100, 1, 10, 0)
        renderer_spin.set_property("adjustment", adjustment)

        column_spin = Gtk.TreeViewColumn("Amount", renderer_spin, text=1)
        treeview.append_column(column_spin)

        self.add(treeview)

    def on_amount_edited(self, widget, path, value):
        self.liststore[path][1] = int(value)

win = CellRendererSpinWindow()
win.connect("delete-event", Gtk.main_quit)
win.show_all()
Gtk.main()

This code comes from http://python-gtk-3-tutorial.readthedocs.org/en/latest/cellrenderers.html

It is confirmed by another user via Ubuntu launchpad at https://bugs.launchpad.net/ubuntu/+source/pygobject/+bug/908889

My system is a Debian system tracking debian testing.

Exact python --version is Python 2.7.2+

----------
components: None
messages: 154426
nosy: Narnie.Harshoe
priority: normal
severity: normal
status: open
title: GTK3 Segmentation fault from Warning: g_object_notify: assertion `G_IS_OBJECT (object)' failed
type: crash
versions: Python 2.7

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue14137>
_______________________________________