#0  PyEval_EvalCodeEx (co=0x1490330, globals=<value optimized out>, 
    locals=<value optimized out>, args=0x1784530, argcount=2, kws=0x0, 
    kwcount=0, defs=0x0, defcount=0, closure=0x0) at Python/ceval.c:3069
#1  0x0000003d68a7043a in function_call (func=0x15d6050, arg=0x1784518, kw=0x0)
    at Objects/funcobject.c:526
#2  0x0000003d68a4b2a4 in PyObject_Call (func=0x15d6050, 
    arg=<value optimized out>, kw=<value optimized out>)
    at Objects/abstract.c:2529
#3  0x0000003d68a59aad in instancemethod_call (func=0x15d6050, arg=0x1784518, 
    kw=0x0) at Objects/classobject.c:2578
#4  0x0000003d68a4b2a4 in PyObject_Call (func=0x178c460, 
    arg=<value optimized out>, kw=<value optimized out>)
    at Objects/abstract.c:2529
#5  0x0000003d68adb3e2 in PyEval_CallObjectWithKeywords (func=0x178c460, 
    arg=0x1783190, kw=<value optimized out>) at Python/ceval.c:3881
#6  0x00007fffec0e6d00 in _wrap_GooCanvasItemSimple__proxy_do_simple_update (
    self=<value optimized out>, cr=0x2275c00) at goocanvas.c:2415
#7  0x00007fffebea0a7a in goo_canvas_item_simple_update_internal (
    simple=0x7fffd02ded10, cr=0x2275c00) at goocanvasitemsimple.c:1159
#8  0x00007fffebea11ec in goo_canvas_item_simple_update (item=0x7fffd02ded10, 
    entire_tree=<value optimized out>, cr=0x2275c00, bounds=0x7fffffffc360)
    at goocanvasitemsimple.c:1225
#9  0x00007fffebe97033 in goo_canvas_group_update (item=0x1e6c950, 
    entire_tree=1, cr=0x2275c00, bounds=0x7fffffffc3d0) at goocanvasgroup.c:615
#10 0x00007fffebe97033 in goo_canvas_group_update (item=0x1d70810, 
    entire_tree=0, cr=0x2275c00, bounds=0x7fffffffc440) at goocanvasgroup.c:615
#11 0x00007fffebe97033 in goo_canvas_group_update (item=0x18a68f0, 
    entire_tree=0, cr=0x2275c00, bounds=0x7fffffffc4b0) at goocanvasgroup.c:615
#12 0x00007fffebe97033 in goo_canvas_group_update (item=0x18adbb0, 
    entire_tree=0, cr=0x2275c00, bounds=0x7fffffffc530) at goocanvasgroup.c:615
#13 0x00007fffebeb631b in goo_canvas_update_internal (canvas=0x18d0090, 
    cr=0x2275c00) at goocanvas.c:2530
#14 0x00007fffebeb639c in goo_canvas_update (canvas=0x18d0090)
    at goocanvas.c:2562
#15 0x00007fffebeb64dd in goo_canvas_idle_handler (canvas=0x18d0090)
    at goocanvas.c:2572
#16 0x0000003d5fe4f889 in g_idle_dispatch (source=0x2272f90, 
    callback=0x7fffebeb64c0 <goo_canvas_idle_handler>, user_data=0x18d0090)
    at gmain.c:4254
#17 0x0000003d5fe4ba4c in g_main_dispatch (context=0xc3ecf0) at gmain.c:2149
#18 0x0000003d5fe4cf56 in g_main_context_dispatch (context=0xc3ecf0)
    at gmain.c:2702
#19 0x0000003d5fe4d41c in g_main_context_iterate (context=0xc3ecf0, block=1, 
    dispatch=1, self=0x8673b0) at gmain.c:2780
#20 0x0000003d5fe4dbb3 in g_main_loop_run (loop=0x17a1d80) at gmain.c:2988
#21 0x00007ffff5d505c1 in _wrap_g_main_loop_run (self=0x641c90)
    at pygmainloop.c:330
#22 0x0000003d68ae098d in call_function (f=<value optimized out>, 
    throwflag=<value optimized out>) at Python/ceval.c:3996
#23 PyEval_EvalFrameEx (f=<value optimized out>, 
    throwflag=<value optimized out>) at Python/ceval.c:2665
#24 0x0000003d68ae1255 in fast_function (f=<value optimized out>, 
    throwflag=<value optimized out>) at Python/ceval.c:4098
#25 call_function (f=<value optimized out>, throwflag=<value optimized out>)
    at Python/ceval.c:4033
#26 PyEval_EvalFrameEx (f=<value optimized out>, 
    throwflag=<value optimized out>) at Python/ceval.c:2665
#27 0x0000003d68ae1255 in fast_function (f=<value optimized out>, 
    throwflag=<value optimized out>) at Python/ceval.c:4098
#28 call_function (f=<value optimized out>, throwflag=<value optimized out>)
    at Python/ceval.c:4033
#29 PyEval_EvalFrameEx (f=<value optimized out>, 
    throwflag=<value optimized out>) at Python/ceval.c:2665
#30 0x0000003d68ae1255 in fast_function (f=<value optimized out>, 
    throwflag=<value optimized out>) at Python/ceval.c:4098
#31 call_function (f=<value optimized out>, throwflag=<value optimized out>)
    at Python/ceval.c:4033
#32 PyEval_EvalFrameEx (f=<value optimized out>, 
    throwflag=<value optimized out>) at Python/ceval.c:2665
#33 0x0000003d68ae2849 in PyEval_EvalCodeEx (co=0x76a930, 
    globals=<value optimized out>, locals=<value optimized out>, 
    args=<value optimized out>, argcount=0, kws=0x0, kwcount=0, defs=0x0, 
    defcount=0, closure=0x0) at Python/ceval.c:3252
#34 0x0000003d68ae2972 in PyEval_EvalCode (co=<value optimized out>, 
    globals=<value optimized out>, locals=<value optimized out>)
    at Python/ceval.c:666
#35 0x0000003d68afc1d1 in run_mod (mod=<value optimized out>, 
    filename=<value optimized out>, globals=0x681150, locals=0x681150, 
    flags=<value optimized out>, arena=<value optimized out>)
    at Python/pythonrun.c:1346
#36 0x0000003d68afcf3c in PyRun_FileExFlags (fp=0x7b7900, 
    filename=0x7fffffffd5cb "/usr/bin/pitivi", start=<value optimized out>, 
    globals=0x681150, locals=0x681150, closeit=1, flags=0x7fffffffcfd0)
    at Python/pythonrun.c:1332
#37 0x0000003d68afdb17 in PyRun_SimpleFileExFlags (fp=0x7b7900, 
    filename=0x7fffffffd5cb "/usr/bin/pitivi", closeit=1, flags=0x7fffffffcfd0)
    at Python/pythonrun.c:936
#38 0x0000003d68b0eef8 in Py_Main (argc=<value optimized out>, 
    argv=<value optimized out>) at Modules/main.c:606
#39 0x00007ffff7874cdd in __libc_start_main (main=0x400940 <main>, argc=2, 
    ubp_av=0x7fffffffd0f8, init=<value optimized out>, 
    fini=<value optimized out>, rtld_fini=<value optimized out>, 
    stack_end=0x7fffffffd0e8) at libc-start.c:226
#40 0x0000000000400849 in _start ()