nessita@dali:~$ gdb nautilus
GNU gdb (GDB) 7.2-ubuntu
Copyright (C) 2010 Free Software Foundation, Inc.
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This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/bin/nautilus...(no debugging symbols found)...done.
(gdb) r
Starting program: /usr/bin/nautilus 
[Thread debugging using libthread_db enabled]
[New Thread 0x7fffeb3ad710 (LWP 20712)]
[New Thread 0x7fffea35a710 (LWP 20714)]
Initializing nautilus-gdu extension

(nautilus:20681): GLib-GObject-WARNING **: /build/buildd/glib2.0-2.26.0/gobject/gsignal.c:2275: signal `file_unpublished' is invalid for instance `0x8d4e00'

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff490eda2 in g_slice_free_chain_with_offset () from /lib/libglib-2.0.so.0
(gdb) thread apply all bt

Thread 3 (Thread 0x7fffea35a710 (LWP 20714)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:212
#1  0x00007ffff4dcf3c2 in ?? () from /usr/lib/libgthread-2.0.so.0
#2  0x00007ffff48c80f1 in ?? () from /lib/libglib-2.0.so.0
#3  0x00007ffff491b771 in ?? () from /lib/libglib-2.0.so.0
#4  0x00007ffff49197e4 in ?? () from /lib/libglib-2.0.so.0
#5  0x00007ffff7183971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#6  0x00007ffff35bd91d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fffeb3ad710 (LWP 20712)):
#0  0x00007ffff35b11d3 in __poll (fds=<value optimized out>, nfds=<value optimized out>, 
    timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007ffff48f4009 in ?? () from /lib/libglib-2.0.so.0
#2  0x00007ffff48f47b5 in g_main_loop_run () from /lib/libglib-2.0.so.0
#3  0x00007ffff5be80f4 in ?? () from /usr/lib/libgio-2.0.so.0
#4  0x00007ffff49197e4 in ?? () from /lib/libglib-2.0.so.0
#5  0x00007ffff7183971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#6  0x00007ffff35bd91d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7ffff7fb7940 (LWP 20681)):
#0  0x00007ffff490eda2 in g_slice_free_chain_with_offset () from /lib/libglib-2.0.so.0
#1  0x00007ffff51e4a6e in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
#2  0x00007ffff51fa4d7 in ?? () from /usr/lib/libgobject-2.0.so.0
#3  0x00007ffff51fb996 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
#4  0x00007ffff51fbf53 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#5  0x00007fffdee8c216 in ready_signal_idle_cb (user_data=0x8d4e00) at syncdaemon-daemon.c:319
#6  0x00007ffff48f0342 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#7  0x00007ffff48f42a8 in ?? () from /lib/libglib-2.0.so.0
#8  0x00007ffff48f47b5 in g_main_loop_run () from /lib/libglib-2.0.so.0
#9  0x00007ffff64503e7 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#10 0x0000000000441d22 in ?? ()
#11 0x00007ffff34f5d8e 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=0x7fffffffe1e8)
    at libc-start.c:226
#12 0x000000000042ef89 in ?? ()
#13 0x00007fffffffe1e8 in ?? ()
#14 0x000000000000001c in ?? ()
#15 0x0000000000000001 in ?? ()
#16 0x00007fffffffe4e7 in ?? ()
#17 0x0000000000000000 in ?? ()
(gdb)