Thread 1 (Thread 0x7ffff7fbb7d0 (LWP 6068)):
#0  0x00007ffff2ca44b5 in raise () from /lib/libc.so.6
#1  0x00007ffff2ca7f50 in abort () from /lib/libc.so.6
#2  0x00007ffff3258550 in IA__g_assertion_message (
    domain=<value optimized out>, file=<value optimized out>, 
    line=<value optimized out>, func=0x7fffe81af280 "pygobject_new_full", 
    message=0x17d61f0 "assertion failed: (tp != NULL)")
    at /build/buildd/glib2.0-2.22.3/glib/gtestutils.c:1317
#3  0x00007ffff3258ac0 in IA__g_assertion_message_expr (domain=0x0, 
    file=0x7fffe81ae750 "/build/buildd/pygobject-2.18.0/gobject/pygobject.c", 
    line=924, func=0x7fffe81af280 "pygobject_new_full", 
    expr=<value optimized out>)
    at /build/buildd/glib2.0-2.22.3/glib/gtestutils.c:1328
#4  0x00007fffe81a7e4e in ?? ()
   from /usr/lib/pymodules/python2.6/gtk-2.0/gobject/_gobject.so
#5  0x00007fffe81ab12d in ?? ()
   from /usr/lib/pymodules/python2.6/gtk-2.0/gobject/_gobject.so
#6  0x00007fffe81ab531 in ?? ()
   from /usr/lib/pymodules/python2.6/gtk-2.0/gobject/_gobject.so
#7  0x00007fffe81a5857 in ?? ()
   from /usr/lib/pymodules/python2.6/gtk-2.0/gobject/_gobject.so
#8  0x00007ffff28bccf4 in call_function (f=0x16207d0, 
    throwflag=<value optimized out>) at ../Python/ceval.c:3706
#9  PyEval_EvalFrameEx (f=0x16207d0, throwflag=<value optimized out>)
    at ../Python/ceval.c:2389
#10 0x00007ffff28be975 in PyEval_EvalCodeEx (co=0x1648918, 
    globals=<value optimized out>, locals=<value optimized out>, args=0x2, 
    argcount=<value optimized out>, kws=<value optimized out>, kwcount=0, 
    defs=0x0, defcount=0, closure=0x0) at ../Python/ceval.c:2968
#11 0x00007ffff2846e80 in function_call (func=0x1653de8, arg=0x1656710, kw=0x0)
    at ../Objects/funcobject.c:524
#12 0x00007ffff281ae53 in PyObject_Call (func=0x1653de8, arg=0x17b4, kw=0x6)
    at ../Objects/abstract.c:2492
#13 0x00007ffff282b64f in instancemethod_call (func=0x1653de8, arg=0x1656710, 
    kw=0x0) at ../Objects/classobject.c:2579
#14 0x00007ffff281ae53 in PyObject_Call (func=0x166e2d0, arg=0x17b4, kw=0x6)
    at ../Objects/abstract.c:2492
#15 0x00007ffff281fbdb in call_function_tail (o=<value optimized out>, 
    name=<value optimized out>, format=<value optimized out>)
    at ../Objects/abstract.c:2524
#16 PyObject_CallMethod (o=<value optimized out>, name=<value optimized out>, 
    format=<value optimized out>) at ../Objects/abstract.c:2601
#17 0x00007ffff7b0471f in call_python_method (object=0x168aef0, 
    shell=0x8350b0, method=0x7ffff7b9f934 "activate") at rb-python-plugin.c:60
#18 0x00007ffff7b048c7 in impl_activate (plugin=0x168aef0, shell=0x8350b0)
    at rb-python-plugin.c:130
#19 0x00007ffff7b026e4 in rb_plugins_engine_activate_plugin_real (
    info=0x168d920) at rb-plugins-engine.c:524
#20 rb_plugins_engine_activate_plugin (info=0x168d920)
    at rb-plugins-engine.c:541
#21 0x00007ffff7b03185 in rb_plugins_engine_load_cb (
    file=<value optimized out>, dir=<value optimized out>, 
    userdata=<value optimized out>) at rb-plugins-engine.c:316
#22 0x00007ffff7b6a312 in _uri_handle_recurse (dir=0x1691e60, cancel=0x0, 
    handled=<value optimized out>, func=<value optimized out>, 
    user_data=<value optimized out>) at rb-file-helpers.c:667
#23 0x00007ffff7b6a37e in _uri_handle_recurse (dir=0xb817a0, cancel=0x0, 
    handled=<value optimized out>, func=<value optimized out>, 
    user_data=<value optimized out>) at rb-file-helpers.c:670
#24 0x00007ffff7b6a441 in rb_uri_handle_recursively (
    text_uri=<value optimized out>, cancel=0x0, 
    func=0x7ffff7b02d40 <rb_plugins_engine_load_cb>, user_data=0x0)
    at rb-file-helpers.c:696
#25 0x00007ffff7b02b61 in rb_plugins_engine_load_dir (
    shell=<value optimized out>) at rb-plugins-engine.c:329
#26 rb_plugins_engine_load_all (shell=<value optimized out>)
    at rb-plugins-engine.c:342
#27 rb_plugins_engine_init (shell=<value optimized out>)
    at rb-plugins-engine.c:375
#28 0x00007ffff7ae6ef2 in rb_shell_constructor (type=<value optimized out>, 
    n_construct_properties=<value optimized out>, 
    construct_properties=<value optimized out>) at rb-shell.c:1403
#29 0x00007ffff34d199f in IA__g_object_newv (
    object_type=<value optimized out>, n_parameters=5, 
    parameters=<value optimized out>)
    at /build/buildd/glib2.0-2.22.3/gobject/gobject.c:1252
#30 0x00007ffff34d2241 in IA__g_object_new_valist (object_type=8565504, 
    first_property_name=0x0, var_args=0x7fffffffe660)
    at /build/buildd/glib2.0-2.22.3/gobject/gobject.c:1364
#31 0x00007ffff34d24ac in IA__g_object_new (object_type=8565504, 
    first_property_name=0x7ffff7b8d240 "no-registration")
    at /build/buildd/glib2.0-2.22.3/gobject/gobject.c:1086
#32 0x00007ffff7ae30b2 in rb_shell_new (no_registration=0, no_update=0, 
    dry_run=0, rhythmdb=0x0, playlists=0x0) at rb-shell.c:952
#33 0x0000000000403e02 in main (argc=1, argv=0x7fffffffe908) at main.c:272


