$ gdb python
GNU gdb (GDB) Fedora (7.5.1-38.fc18)
Copyright (C) 2012 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 "i686-redhat-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/bin/python...Reading symbols from /usr/bin/python...(no debugging symbols found)...done.
(no debugging symbols found)...done.
Missing separate debuginfos, use: debuginfo-install python-2.7.3-13.fc18.i686
(gdb) run
Starting program: /usr/bin/python
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/libthread_db.so.1".
Python 2.7.3 (default, Aug  9 2012, 17:23:58)
[GCC 4.7.1 20120720 (Red Hat 4.7.1-5)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import mousetrap.app.main as mousetrap
Detaching after fork from child process 9443.
>>> mousetrap.Controller().start()
[New Thread 0xb76b6b40 (LWP 9464)]
DEBUG: mousetrap.ocvfw.idm -> Starting Forehead idm
INFO: mousetrap.ocvfw.idm -> Forhead Algorithm loaded
DEBUG: mousetrap.ocvfw.idm -> Setting Capture
DEBUG: Commons -> New Singleton Add (mousetrap.ocvfw.dev.camera.Camera)
VIDIOC_QUERYMENU: Invalid argument
VIDIOC_QUERYMENU: Invalid argument
VIDIOC_QUERYMENU: Invalid argument
DEBUG: ocvfw -> start_camera: Camera Started
DEBUG: Camera -> Loaded backend OcvfwPython
DEBUG: _ocv - set -> Changed lk_swap value to True
INFO: mousetrap - Idm loaded and started
[New Thread 0xb0075b40 (LWP 9465)]
INFO: mousetrap - MouseTrap's Interface Built and Loaded

Program received signal SIGSEGV, Segmentation fault.
0x4e596eb0 in scale_line () from /lib/libgdk_pixbuf-2.0.so.0
(gdb) bt
#0  0x4e596eb0 in scale_line () from /lib/libgdk_pixbuf-2.0.so.0
#1  0x4e598cfa in pixops_process () from /lib/libgdk_pixbuf-2.0.so.0
#2  0x4e5997c5 in _pixops_scale () from /lib/libgdk_pixbuf-2.0.so.0
#3  0x4e58ee32 in gdk_pixbuf_scale () from /lib/libgdk_pixbuf-2.0.so.0
#4  0x4e58f53f in gdk_pixbuf_scale_simple () from /lib/libgdk_pixbuf-2.0.so.0
#5  0xb7a0b61a in ffi_call_SYSV () from /lib/libffi.so.5
#6  0xb7a0b391 in ffi_call () from /lib/libffi.so.5
#7  0x417d306d in g_callable_info_invoke () from /lib/libgirepository-1.0.so.1
#8  0x417d4665 in g_function_info_invoke () from /lib/libgirepository-1.0.so.1
#9  0xb7d12050 in pygi_callable_info_invoke () from /usr/lib/python2.7/site-packages/gi/_gi.so
#10 0xb7d12d61 in _wrap_g_callable_info_invoke () from /usr/lib/python2.7/site-packages/gi/_gi.so
#11 0x4caa6139 in PyCFunction_Call () from /lib/libpython2.7.so.1.0
#12 0x4cb042ec in PyEval_EvalFrameEx () from /lib/libpython2.7.so.1.0
#13 0x4cb06199 in PyEval_EvalCodeEx () from /lib/libpython2.7.so.1.0
#14 0x4cb03fd4 in PyEval_EvalFrameEx () from /lib/libpython2.7.so.1.0
#15 0x4cb04a91 in PyEval_EvalFrameEx () from /lib/libpython2.7.so.1.0
#16 0x4cb06199 in PyEval_EvalCodeEx () from /lib/libpython2.7.so.1.0
#17 0x4ca90961 in ?? () from /lib/libpython2.7.so.1.0
#18 0x4ca699e1 in PyObject_Call () from /lib/libpython2.7.so.1.0
#19 0x4ca792dc in ?? () from /lib/libpython2.7.so.1.0
#20 0x4ca699e1 in PyObject_Call () from /lib/libpython2.7.so.1.0
#21 0x4cafef1c in PyEval_CallObjectWithKeywords () from /lib/libpython2.7.so.1.0
#22 0x4ca6996c in PyObject_CallObject () from /lib/libpython2.7.so.1.0
#23 0xb7fed22c in _pyglib_handler_marshal () from /lib/libpyglib-gi-2.0-python.so.0
#24 0xb7bb8e50 in g_timeout_dispatch () from /lib/libglib-2.0.so.0
#25 0xb7bb815b in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#26 0xb7bb8500 in g_main_context_iterate.isra.22 () from /lib/libglib-2.0.so.0
#27 0xb7bb8963 in g_main_loop_run () from /lib/libglib-2.0.so.0
#28 0xb7cf6779 in _wrap_g_main_loop_run () from /usr/lib/python2.7/site-packages/gi/_glib/_glib.so
#29 0x4cb04c07 in PyEval_EvalFrameEx () from /lib/libpython2.7.so.1.0
#30 0x4cb04a91 in PyEval_EvalFrameEx () from /lib/libpython2.7.so.1.0
#31 0x4cb06199 in PyEval_EvalCodeEx () from /lib/libpython2.7.so.1.0
#32 0x4cb06314 in PyEval_EvalCode () from /lib/libpython2.7.so.1.0
#33 0x4cb1f5fb in ?? () from /lib/libpython2.7.so.1.0
#34 0x4cb215cd in PyRun_InteractiveOneFlags () from /lib/libpython2.7.so.1.0
#35 0x4cb217b0 in PyRun_InteractiveLoopFlags () from /lib/libpython2.7.so.1.0
---Type <return> to continue, or q <return> to quit---
#36 0x4cb21dc2 in PyRun_AnyFileExFlags () from /lib/libpython2.7.so.1.0
#37 0x4cb33612 in Py_Main () from /lib/libpython2.7.so.1.0
#38 0x08048578 in main ()
(gdb)