Re: Gtk::Widget::on_hide

[Alan Mazer <alan s mazer jpl nasa gov>]

The G_OBJECT_GET_CLASS macro is probably dereferencing gobject_, e.g., 
replacing it with gobject_->class or some such...

-- Alan


On 11/18/2013 6:53 AM, John Emmas wrote:
> I'm trying to debug a program which keeps crashing in 
> 'Gtk::Widget::on_hide()'.  Here's what that function looks like:-
>
>     void Gtk::Widget::on_hide()
>     {
>       BaseClassType *const base = static_cast<BaseClassType*>(
>           g_type_class_peek_parent(G_OBJECT_GET_CLASS(gobject_)) // 
> Get the parent class of the object class (The original underlying C 
> class).
>       );
>
>       if(base && base->hide)
>         (*base->hide)(gobj());
>     }
>
> Every time the crash occurs, variable 'gobject_' is always NULL. 
> Although I'm currently trying to figure out why, the above code looks 
> (to my untrained eye) as though it should be reasonably well behaved 
> with a NULL gobject_.  It looks as if that function should be safe, 
> even when gobject_ is NULL.  Is that a reasonable assessment or just 
> wishful thinking on my part?
>
> John
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