Segmentation fault when displaying menu items (menu factory)

[Fabio Gonzalez <fabiojosue gmail com>]

I am developing a video editor GNU GPL, using GTK. It supports effect plugins, so I made a function that automatically generates menus (See http://fjme.svn.sf.net/viewvc/fjme/trunk/libfjme/window.c?revision=89&view=markup, line 353) . Menus and submenus are shown, but whenever it try to show a menu item, the program falls(Segmentation fault).

I have not the faintest idea of the cause of it. Before his fall, these lines are shown:

(fjmovieeditor-1.0.0:10385): Gtk-CRITICAL **: IA__gtk_widget_get_pango_context: assertion `GTK_IS_WIDGET (widget)' failed

(fjmovieeditor-1.0.0:10385): Pango-CRITICAL **: pango_context_get_language: assertion `context != NULL' failed