The source project of this merge request has been removed.
invalid cast from 'GtkButton' to 'GtkBox'
on adding a page to a GtkNotebook
(soffice): Gtk-CRITICAL **: gtk_box_remove: assertion 'GTK_IS_BOX (box)' failed
on adding a page to a GtkNotebook
(soffice): Gtk-CRITICAL **: gtk_box_remove: assertion 'GTK_IS_BOX (box)' failed