Re: help with strange stack back trace

[mrl netbank com br]

On Mon, Apr 01, 2002 at 10:47:34AM -0500, Ramsés Morales wrote:
> Hi. 
> 
> I was going to debug a program with electric fence, using
> EF_PROTECT_FREE=1 to detect access to freed memory. 
> 
> My program segfaults in a place it shouldn't, here is the backtrace: 
> 
> #0  0x404c9066 in strlen () from /lib/i686/libc.so.6 
> #1  0x403f6ea8 in g_strdup () from /usr/local/lib/libglib-2.0.so.0 
> #2  0x403ad2f9 in value_collect_string () at eval.c:41 
> #3  0x401b2744 in gtk_tree_store_set_valist () at eval.c:41 
> #4  0x401b293e in gtk_tree_store_set () at eval.c:41 
> #5  0x0804a9ad in create_magazine_model () at main.c:563 
> #6  0x08049f04 in create_app () at main.c:319 
> #7  0x08049be1 in main (argc=1, argv=0xbffff9b4) at main.c:97 
> #8  0x4045e627 in __libc_start_main (main=0x8049b80 <main>, argc=1, 
>     ubp_av=0xbffff9b4, init=0x8049504 <_init>, fini=0x804bb20 <_fini>, 
>     rtld_fini=0x4000dcc4 <_dl_fini>, stack_end=0xbffff9ac) 
>     at ../sysdeps/generic/libc-start.c:129 
> 
> This means that strlen() is working on a string previously freed. 
> 
> Obviously, this is the offending line of code (line: 285, gvaluetypes.c)
> 
> value->data[0].v_pointer = g_strdup (collect_values[0].v_pointer);
> 
> I'm not sure which one of the macros called inside
> gtk_tree_store_set_valist is responsible for the value_collect_string.
> 
> This looks like a bug on gtk/glib.
> 
> Thanks for your help.
> 
> _______________________________________________
> gtk-app-devel-list mailing list
> gtk-app-devel-list gnome org
> http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
---end quoted text---

Well, what would happen if you do:
gchar *text1, *text2 = g_strdup ("test");
g_free (text2);
text1 = g_strdup (text2);

This is what I undestand from your email (I think this is what you're doing..)..
sorry if I'm wrong.. :)

[]'s
-- 
Marcelo R Leitner <mrl netbank com br>
ICQ #: 29966851