$ gdb parole

warning: Can not parse XML syscalls information; XML support was disabled at compile time.
GNU gdb (Gentoo 7.0.1 p1) 7.0.1
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-pc-linux-gnu".
For bug reporting instructions, please see:
<http://bugs.gentoo.org/>...
Reading symbols from /usr/bin/parole...Reading symbols from /usr/lib64/debug/usr/bin/parole.debug...(no debugging symbols found)...done.
(no debugging symbols found)...done.
(gdb) break gdk_x_error
Function "gdk_x_error" not defined.
Make breakpoint pending on future shared library load? (y or [n]) y

Breakpoint 1 (gdk_x_error) pending.
(gdb) run
Starting program: /usr/bin/parole 
Traceback (most recent call last):
  File "/usr/share/gdb/auto-load/usr/lib64/libgobject-2.0.so.0.2200.3-gdb.py", line 9, in <module>
    from gobject import register
  File "/usr/share/glib-2.0/gdb/gobject.py", line 3, in <module>
    import gdb.backtrace
ImportError: No module named backtrace
[Thread debugging using libthread_db enabled]

(parole:2885): Gtk-WARNING **: Theme directory actions of theme OSX_Aluminium has no size field


(parole:2885): Gtk-WARNING **: Theme directory 128x128 of theme OSX_Aluminium has no size field

(parole:2885): window_title-DEBUG: Init
[New Thread 0x7fffecb2e710 (LWP 2889)]
[New Thread 0x7fffeb257710 (LWP 2890)]
[New Thread 0x7fffea23f710 (LWP 2891)]
[New Thread 0x7fffe841f710 (LWP 2892)]
[New Thread 0x7fffe7c1e710 (LWP 2893)]
[New Thread 0x7fffe741d710 (LWP 2894)]
[New Thread 0x7fffe663f710 (LWP 2895)]
[New Thread 0x7fffe5e3e710 (LWP 2896)]
[New Thread 0x7fffe563d710 (LWP 2897)]
[Thread 0x7fffe563d710 (LWP 2897) exited]
[Thread 0x7fffe663f710 (LWP 2895) exited]
[Thread 0x7fffecb2e710 (LWP 2889) exited]
[New Thread 0x7fffecb2e710 (LWP 2898)]
[New Thread 0x7fffe663f710 (LWP 2899)]
[New Thread 0x7fffe563d710 (LWP 2900)]
[Switching to Thread 0x7fffea23f710 (LWP 2891)]

Breakpoint 1, 0x00007ffff66b9600 in gdk_x_error ()
   from /usr/lib/libgdk-x11-2.0.so.0
(gdb) bt
#0  0x00007ffff66b9600 in gdk_x_error () from /usr/lib/libgdk-x11-2.0.so.0
#1  0x00007ffff44eaf5c in _XError () from /usr/lib/libX11.so.6
#2  0x00007ffff44f1194 in process_responses () from /usr/lib/libX11.so.6
#3  0x00007ffff44f1820 in _XReply () from /usr/lib/libX11.so.6
#4  0x00007ffff44e5632 in XSync () from /usr/lib/libX11.so.6
#5  0x00007fffee60fc36 in gst_xvimagesink_xvimage_put (xvimagesink=0x87c850, 
    xvimage=0x105d4c0) at xvimagesink.c:864
#6  0x00007fffee610233 in gst_xvimagesink_show_frame (
    vsink=<value optimized out>, buf=0x105d4c0) at xvimagesink.c:2326
#7  0x00007ffff3106197 in gst_base_sink_preroll_object (basesink=0x87c850, 
    is_list=0, obj=0x105d4c0) at gstbasesink.c:2865
#8  0x00007ffff310b8dd in gst_base_sink_queue_object_unlocked (basesink=
    0x87c850, pad=0x8880c0, is_list=0, obj=0x105d4c0, prerollable=-536100232)
    at gstbasesink.c:2919
#9  0x00007ffff310d3ac in gst_base_sink_chain_unlocked (basesink=0x87c850, 
    pad=<value optimized out>, is_list=0, obj=0x105d4c0) at gstbasesink.c:3318
#10 0x00007ffff310d865 in gst_base_sink_chain_main (basesink=0x87c850, pad=
    0x8880c0, is_list=0, obj=0x105d4c0) at gstbasesink.c:3356
#11 0x00007ffff2c719e5 in gst_pad_chain_data_unchecked (pad=0x8880c0, 
    is_buffer=1, data=0x105d4c0) at gstpad.c:4042
#12 0x00007ffff2c72486 in gst_pad_push_data (pad=0xf79330, is_buffer=1, data=
    0x105d4c0) at gstpad.c:4271
#13 0x00007ffff311ec49 in gst_base_transform_chain (pad=<value optimized out>, 
    buffer=0x105d4c0) at gstbasetransform.c:2081
#14 0x00007ffff2c719e5 in gst_pad_chain_data_unchecked (pad=0xf5a360, 
    is_buffer=1, data=0x105d4c0) at gstpad.c:4042
#15 0x00007ffff2c72486 in gst_pad_push_data (pad=0xf791b0, is_buffer=1, data=
    0x105d4c0) at gstpad.c:4271
#16 0x00007ffff311ec49 in gst_base_transform_chain (pad=<value optimized out>, 
    buffer=0x7fffe00bba90) at gstbasetransform.c:2081
#17 0x00007ffff2c719e5 in gst_pad_chain_data_unchecked (pad=0xf79030, 
    is_buffer=1, data=0x7fffe00bba90) at gstpad.c:4042
#18 0x00007ffff2c72486 in gst_pad_push_data (pad=0xf79630, is_buffer=1, data=
    0x7fffe00bba90) at gstpad.c:4271
#19 0x00007ffff311ec49 in gst_base_transform_chain (pad=<value optimized out>, 
    buffer=0x7fffe00bba90) at gstbasetransform.c:2081
#20 0x00007ffff2c719e5 in gst_pad_chain_data_unchecked (pad=0xf794b0, 
    is_buffer=1, data=0x7fffe00bba90) at gstpad.c:4042
#21 0x00007ffff2c72486 in gst_pad_push_data (pad=0xef5c30, is_buffer=1, data=
    0x7fffe00bba90) at gstpad.c:4271
#22 0x00007ffff2c719e5 in gst_pad_chain_data_unchecked (pad=0xef3c40, 
    is_buffer=1, data=0x7fffe00bba90) at gstpad.c:4042
#23 0x00007ffff2c72486 in gst_pad_push_data (pad=0x8883c0, is_buffer=1, data=
    0x7fffe00bba90) at gstpad.c:4271
#24 0x00007fffee1b7f3d in gst_goom_chain (pad=<value optimized out>, buffer=
    0xc74c68) at gstgoom.c:531
#25 0x00007ffff2c719e5 in gst_pad_chain_data_unchecked (pad=0x888240, 
    is_buffer=1, data=0x7fffe00bbd90) at gstpad.c:4042
---Type <return> to continue, or q <return> to quit---
#26 0x00007ffff2c72486 in gst_pad_push_data (pad=0x888cc0, is_buffer=1, data=
    0x7fffe00bbd90) at gstpad.c:4271
#27 0x00007ffff311ec49 in gst_base_transform_chain (pad=<value optimized out>, 
    buffer=0xf1e030) at gstbasetransform.c:2081
#28 0x00007ffff2c719e5 in gst_pad_chain_data_unchecked (pad=0x8889c0, 
    is_buffer=1, data=0xf1e030) at gstpad.c:4042
#29 0x00007ffff2c72486 in gst_pad_push_data (pad=0x888840, is_buffer=1, data=
    0xf1e030) at gstpad.c:4271
#30 0x00007ffff311ec49 in gst_base_transform_chain (pad=<value optimized out>, 
    buffer=0xf1e030) at gstbasetransform.c:2081
#31 0x00007ffff2c719e5 in gst_pad_chain_data_unchecked (pad=0x888e40, 
    is_buffer=1, data=0xf1e030) at gstpad.c:4042
#32 0x00007ffff2c72486 in gst_pad_push_data (pad=0xf5a1e0, is_buffer=1, data=
    0xf1e030) at gstpad.c:4271
#33 0x00007ffff311ec49 in gst_base_transform_chain (pad=<value optimized out>, 
    buffer=0xf1e030) at gstbasetransform.c:2081
#34 0x00007ffff2c719e5 in gst_pad_chain_data_unchecked (pad=0xf5a060, 
    is_buffer=1, data=0xf1e030) at gstpad.c:4042
#35 0x00007ffff2c72486 in gst_pad_push_data (pad=0xf5ade0, is_buffer=1, data=
    0xf1e030) at gstpad.c:4271
#36 0x00007fffec11863c in gst_queue_push_one (pad=<value optimized out>)
    at gstqueue.c:1048
#37 gst_queue_loop (pad=<value optimized out>) at gstqueue.c:1150
#38 0x00007ffff2c8f457 in gst_task_func (task=0xf5de70) at gsttask.c:234
#39 0x00007ffff15374d2 in g_thread_pool_thread_proxy ()
   from /usr/lib/libglib-2.0.so.0
#40 0x00007ffff1535f94 in g_thread_create_proxy ()
   from /usr/lib/libglib-2.0.so.0
#41 0x00007ffff23aa894 in start_thread () from /lib/libpthread.so.0
#42 0x00007ffff1045f9d in clone () from /lib/libc.so.6
#43 0x0000000000000000 in ?? ()