Stock item "GO_BACK"

[John Emmas <john creativepost co uk>]

I'm building a gtkmm dialog which uses the following line of code to add 
a button (where 'back_button' is of type Gtk::Button*):-

        back_button = add_button (Stock::GO_BACK, RESPONSE_NO);

When the specified button is 'Stock::GO_BACK' the program repeatedly 
crashes at run time.  I've tried around 20 other values (Stock::OPEN / 
Stock::CANCEL / Stock::QUIT etc) and all of them worked successfully.  
It's just that one value which crashes.  The only discrepancy I can see 
is this (in gtkmm/stock.h):-

    extern GTKMM_API const Gtk::BuiltinStockID GO_BACK; /*!< 
left-to-right languages: @image html gtk-go-back-ltr.png */

compared to this, in gtkstock.h (libgtk):-

    /**
     * GTK_STOCK_GO_BACK:
     *
     * The "Back" item.
     * <inlinegraphic fileref="go-previous-ltr.png" 
format="PNG"></inlinegraphic>
     * RTL variant
     * <inlinegraphic fileref="go-previous-rtl.png" 
format="PNG"></inlinegraphic>
     */
    #define GTK_STOCK_GO_BACK  "gtk-go-back"

Notice from the comments that gtkmm seems to think the graphic image 
should be called "gtk-go-back-ltr.png" whereas gtkmm thinks it's called 
"go-previous-ltr.png".  I don't know if I happened to pick 20 good 
examples but in all the other cases, gtkmm and gtk+ seemed to agree 
about the name.  Could this disagreement be causing my crash? And if so, 
which name is the right one?

John