Code review comment for lp:~rodrigo-moya/ubuntuone-client/fix-613219

Following Roman's instructions, what I've got is:

(gdb) r
Starting program: /usr/bin/nautilus
[Thread debugging using libthread_db enabled]
[New Thread 0x7fffeb8d8710 (LWP 15757)]
[New Thread 0x7fffeaa86710 (LWP 15758)]
Initializing nautilus-gdu extension
[New Thread 0x7fffda57c710 (LWP 15759)]
[New Thread 0x7fffd9d7b710 (LWP 15760)]

(nautilus:15754): GConf-CRITICAL **: gconf_value_free: assertion `value != NULL' failed
[New Thread 0x7fffcfb2f710 (LWP 15761)]

(nautilus:15754): GConf-CRITICAL **: gconf_value_free: assertion `value != NULL' failed
Nautilus-Share-Message: Called "net usershare info" but it failed: 'net usershare' returned error 255: net usershare: cannot open usershare directory /var/lib/samba/usershares. Error No such file or directory
Please ask your system administrator to enable user sharing.

[Thread 0x7fffd9d7b710 (LWP 15760) exited]
[Thread 0x7fffeaa86710 (LWP 15758) exited]

(nautilus:15754): GLib-WARNING **: GError set over the top of a previous GError or uninitialized memory.
This indicates a bug in someone's code. You must ensure an error is NULL before it's set.
The overwriting error message was: Message did not receive a reply (timeout by message bus)

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff36be7aa in _IO_vfprintf_internal (s=0x7fffffffcab0, format=<value optimized out>,
    ap=0x7fffffffcc80) at vfprintf.c:1614
1614 vfprintf.c: No such file or directory.
 in vfprintf.c
(gdb) where
#0 0x00007ffff36be7aa in _IO_vfprintf_internal (s=0x7fffffffcab0, format=<value optimized out>,
    ap=0x7fffffffcc80) at vfprintf.c:1614
#1 0x00007ffff3773f1c in __vasprintf_chk (result_ptr=0x7fffffffcc08, flags=1,
    format=0x7fffdc9e8908 "Error calling current_status: %s", args=0x7fffffffcc80)
    at vasprintf_chk.c:68
#2 0x00007ffff4ad5c7b in g_vasprintf () from /lib/libglib-2.0.so.0
#3 0x00007ffff4ab4960 in g_strdup_vprintf () from /lib/libglib-2.0.so.0
#4 0x00007ffff4a9d068 in g_logv () from /lib/libglib-2.0.so.0
#5 0x00007ffff4a9d4a3 in g_log () from /lib/libglib-2.0.so.0
#6 0x00007fffdc9e4156 in syncdaemon_status_interface_get_current_status (interface=0xc9a640)
    at syncdaemon-status-interface.c:308
#7 0x00007fffdd04f12e in ubuntuone_nautilus_daemon_ready (daemon=<value optimized out>,
    user_data=<value optimized out>) at ubuntuone-nautilus.c:1009
#8 0x00007ffff5385afe in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
#9 0x00007ffff539e379 in ?? () from /usr/lib/libgobject-2.0.so.0
#10 0x00007ffff539faf6 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
#11 0x00007ffff53a0353 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#12 0x00007ffff1f2876f in ?? () from /usr/lib/libdbus-glib-1.so.2
#13 0x00007ffff5385afe in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
#14 0x00007ffff539e379 in ?? () from /usr/lib/libgobject-2.0.so.0
#15 0x00007ffff539faf6 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
#16 0x00007ffff53a0353 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#17 0x00007ffff1f2988e in ?? () from /usr/lib/libdbus-glib-1.so.2
#18 0x00007ffff1ce6aa6 in dbus_connection_dispatch () from /lib/libdbus-1.so.3
#19 0x00007ffff1f1fa45 in ?? () from /usr/lib/libdbus-glib-1.so.2
#20 0x00007ffff4a927e2 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#21 0x00007ffff4a96748 in ?? () from /lib/libglib-2.0.so.0
#22 0x00007ffff4a96c55 in g_main_loop_run () from /lib/libglib-2.0.so.0
#23 0x00007ffff662ca47 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#24 0x0000000000442132 in ?? ()
#25 0x00007ffff3693d8e in __libc_start_main (main=<value optimized out>,
    argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>,
    fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fffffffe1c8)
    at libc-start.c:226
#26 0x000000000042f199 in ?? ()
#27 0x00007fffffffe1c8 in ?? ()
#28 0x000000000000001c in ?? ()
#29 0x0000000000000001 in ?? ()
#30 0x00007fffffffe4cb in ?? ()
#31 0x0000000000000000 in ?? ()
(gdb)