On Tue, Apr 18, 2006 at 03:05:51AM -0700, Deependra Shekhawat wrote:
> Hello friends,
> This is my code:
>
> struct splash
> {
> GtkWidget *splash_image;
> };
> void func1(void)
> {
> GtkWidget *img;
> struct splash p;
This structure is created on stack and exists only until the
function func1 exits.
> img=gtk_image_new();
> p.splash_image=img;
>
> g_signal_connect(G_OBJECT(button1),
> "clicked",
> G_CALLBACK(on_butt_clicked),
> (gpointer) &p);
Therefore &p becomes invalid immediately after you pass it
to g_signal_connect().
> }
>
> void on_butt_clicked(GtkButton *button,gpointer data)
> {
> struct splash *ptr;
> ptr=(struct splash *)data;
>
> //some code is here
>
> //following line gives error at execution time.
> gtk_image_set_from_pixbuf(GTK_IMAGE((GtkWidget*)ptr->splash_image),buffer);
> }
>
> Error is:
> (splash_screen:3549): Gtk-CRITICAL **: file
> gtkimage.c: line 772 (gtk_image_set_from_pixbuf):
> assertion `GTK_IS_IMAGE (image)' failed
So, you are accessing some random piece of stack here.
Yeti
--
That's enough.
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