Christoph Kukulies <[EMAIL PROTECTED]> writes:

> gtk-1.2.8:
> 
> I built Sweep, a sound editing tool.and I got the following when I started it, resp. 
>when I tried to open a 
> sound file:
> 
> Gtk-WARNING **: invalid cast from (NULL) pointer to `GtkObject'
> 
> Gtk-CRITICAL **: file gtksignal.c: line 724 (gtk_signal_connect): assertion `object 
>!= NULL' failed.
>   
> Any clues where to look. Who do I have top blame: Gtk or the application?

Most probably the application. It looks as if you try to connect to a signal
of a nonexistant object (the object pointer is NULL). You should check all
parameters of (public) functions with g_return_if_fail (foo != NULL) 
statements to catch those errors early.


Salut, Sven

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