Re: gtk_tree_model_get ()

["Hubert Sokolowski" <h sokolowski wsisiz edu pl>]

> On Tuesday 11 January 2005 08:58, Hubert Sokolowski wrote:
>
> > so as I understand that I have to free place_string_here, for example
> >
> > gchar *s;
> > gtk_tree_model_get (model, &iter,
> >                         COLUMN_BLOCKED, &s,
> >                         -1);
> >     if (s[0] == 'T')
> >       s = "Odblokuj";
> >     else
> >       s = "Zablokuj";
> >     g_free (s);
oops, I didn't see I was using the same variable s.
thanks for help.


> > but I get segmentation fault on g_free (s), and valgrind says
> > Invalid free()
> > Address 0x8068C2A is not stack'd, malloc'd or (recently) free'd
> >
> > I want to know if I misunderstood the docs or the docs lies.
>
> You are assigning a constant string to  s  and then free that - no wonder
> it
> segfaults on you. This will work:
>
>  gchar *s;
>  gtk_tree_model_get (model, &iter,
>                          COLUMN_BLOCKED, &s,
>                          -1);
>  g_print ("s = '%s'\n", s);
>  g_free (s);
>
>
> This will segfault:
>
>  gchar *s;
>  s = "foobar";
>  g_free (s);
>
> On a side note, s will be set to NULL by gtk_tree_model_get() if you
> haven't
> put a string into the model yet, so s[0] will segfault as well in case
> you're
> ever accessing an empty row/column).

ok, fixed, thanks a lot:).