commit 6ed9fd7a27d85b5abecc0f727282586bc616b79d
Author: iain holmes <iain@xamarin.com>
Date:   Mon Jul 25 17:00:40 2016 +0100

    [GtkWidget] Always create an accessibilityy object for every widget

    Create an accessibility once the widget has been fully constructed.

diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index facc0db..55d1fbc 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -255,6 +255,7 @@ static void	gtk_widget_get_property		 (GObject           *object,
 static void	gtk_widget_dispose		 (GObject	    *object);
 static void	gtk_widget_real_destroy		 (GtkObject	    *object);
 static void	gtk_widget_finalize		 (GObject	    *object);
+static void gtk_widget_constructed (GObject     *object);
 static void	gtk_widget_real_show		 (GtkWidget	    *widget);
 static void	gtk_widget_real_hide		 (GtkWidget	    *widget);
 static void	gtk_widget_real_map		 (GtkWidget	    *widget);
@@ -481,6 +482,7 @@ gtk_widget_class_init (GtkWidgetClass *klass)

   gobject_class->dispose = gtk_widget_dispose;
   gobject_class->finalize = gtk_widget_finalize;
+  gobject_class->constructed = gtk_widget_constructed;
   gobject_class->set_property = gtk_widget_set_property;
   gobject_class->get_property = gtk_widget_get_property;

@@ -2961,6 +2963,13 @@ gtk_widget_init (GtkWidget *widget)
   g_object_ref (widget->style);
 }

+static void
+gtk_widget_constructed (GObject *object)
+{
+  // Always create an accessible for widgets
+  gtk_widget_get_accessible (GTK_WIDGET (object));
+  G_OBJECT_CLASS (gtk_widget_parent_class)->constructed (object);
+}

 static void
 gtk_widget_dispatch_child_properties_changed (GtkWidget   *widget,