[gnome-control-center] region: Cancel any async operations with callbacks on finalize

[Rui Matos <rtcm src gnome org>]

commit 3efb71bab7ed10bdd9de8c5d4bffe677ad0dbc79
Author: Rui Matos <tiagomatos gmail com>
Date:   Thu Mar 14 11:19:20 2013 +0100

    region: Cancel any async operations with callbacks on finalize
    
    Otherwise we may end up using a finalized "object" in the callbacks.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=695534

 panels/region/cc-region-panel.c |   21 ++++++++++++++++-----
 1 files changed, 16 insertions(+), 5 deletions(-)
---
diff --git a/panels/region/cc-region-panel.c b/panels/region/cc-region-panel.c
index c85c1df..1b53dc5 100644
--- a/panels/region/cc-region-panel.c
+++ b/panels/region/cc-region-panel.c
@@ -83,6 +83,7 @@ struct _CcRegionPanelPrivate {
         GPermission *permission;
         SystemOp     op;
         GDBusProxy  *localed;
+        GCancellable *cancellable;
 
         GtkWidget *overlay;
         GtkWidget *notification;
@@ -127,6 +128,9 @@ cc_region_panel_finalize (GObject *object)
        CcRegionPanel *self = CC_REGION_PANEL (object);
        CcRegionPanelPrivate *priv = self->priv;
 
+        g_cancellable_cancel (priv->cancellable);
+        g_clear_object (&priv->cancellable);
+
         if (priv->user_manager) {
                 g_signal_handlers_disconnect_by_data (priv->user_manager, self);
                 priv->user_manager = NULL;
@@ -1510,17 +1514,22 @@ localed_proxy_ready (GObject      *source,
                      gpointer      data)
 {
         CcRegionPanel *self = data;
-       CcRegionPanelPrivate *priv = self->priv;
+        CcRegionPanelPrivate *priv;
+        GDBusProxy *proxy;
         GError *error = NULL;
 
-        priv->localed = g_dbus_proxy_new_finish (res, &error);
+        proxy = g_dbus_proxy_new_finish (res, &error);
 
-        if (!priv->localed) {
-                g_warning ("Failed to contact localed: %s\n", error->message);
+        if (!proxy) {
+                if (!g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
+                        g_warning ("Failed to contact localed: %s\n", error->message);
                 g_error_free (error);
                 return;
         }
 
+        priv = self->priv;
+        priv->localed = proxy;
+
         gtk_widget_set_sensitive (priv->login_button, TRUE);
 
         g_signal_connect (priv->localed, "g-properties-changed",
@@ -1569,7 +1578,7 @@ setup_login_button (CcRegionPanel *self)
                           "org.freedesktop.locale1",
                           "/org/freedesktop/locale1",
                           "org.freedesktop.locale1",
-                          NULL,
+                          priv->cancellable,
                           (GAsyncReadyCallback) localed_proxy_ready,
                           self);
         g_object_unref (bus);
@@ -1609,6 +1618,8 @@ cc_region_panel_init (CcRegionPanel *self)
 
         priv->user_manager = act_user_manager_get_default ();
 
+        priv->cancellable = g_cancellable_new ();
+
         setup_login_button (self);
         setup_language_section (self);
         setup_input_section (self);