$ gdb --args python -m unittest tests.unit.test_media
GNU gdb (Ubuntu 7.8-1ubuntu4) 7.8.0.20141001-cvs
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Reading symbols from python...Reading symbols from /usr/lib/debug//usr/bin/python2.7...done.
done.
(gdb) r
Starting program: /usr/bin/python -m unittest tests.unit.test_media
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffee5bb700 (LWP 7603)]
............> /home/rob/python/pyglet/bitbucket/pyglet/pyglet/media/__init__.py(653)seek()
-> if self.audio_format.bytes_per_sample == 2:
(Pdb) n
> /home/rob/python/pyglet/bitbucket/pyglet/pyglet/media/__init__.py(655)seek()
-> elif self.audio_format.bytes_per_sample == 4:
(Pdb) n
> /home/rob/python/pyglet/bitbucket/pyglet/pyglet/media/__init__.py(658)seek()
-> self._file.seek(offset)
(Pdb) n
--Return--
> /home/rob/python/pyglet/bitbucket/pyglet/pyglet/media/__init__.py(658)seek()->None
-> self._file.seek(offset)
(Pdb) n

Program received signal SIGSEGV, Segmentation fault.
0x00007fffed8bed78 in call_readline (sys_stdin=<optimised out>, sys_stdout=<optimised out>, prompt=<optimised out>) at /build/buildd/python2.7-2.7.8/Modules/readline.c:1132
1132    /build/buildd/python2.7-2.7.8/Modules/readline.c: No such file or directory.
(gdb) bt
#0  0x00007fffed8bed78 in call_readline (sys_stdin=<optimised out>, sys_stdout=<optimised out>, prompt=<optimised out>) at /build/buildd/python2.7-2.7.8/Modules/readline.c:1132
#1  0x000000000044abc2 in PyOS_Readline (sys_stdin=0x7ffff7bb6640 <_IO_2_1_stdin_>, sys_stdout=sys_stdout@entry=0x7ffff7bb6400 <_IO_2_1_stdout_>, prompt=prompt@entry=0x7ffff61e0474 "(Pdb) ")
    at ../Parser/myreadline.c:207
#2  0x0000000000446093 in builtin_raw_input.lto_priv.1352 (self=<optimised out>, args=<optimised out>) at ../Python/bltinmodule.c:2060
#3  0x00000000004caa35 in call_function (oparg=<optimised out>, pp_stack=<optimised out>) at ../Python/ceval.c:4021
#4  PyEval_EvalFrameEx () at ../Python/ceval.c:2667
#5  0x00000000004c93d1 in PyEval_EvalCodeEx () at ../Python/ceval.c:3253
#6  0x00000000004caf49 in fast_function (nk=<optimised out>, na=<optimised out>, n=<optimised out>, pp_stack=<optimised out>, func=<optimised out>) at ../Python/ceval.c:4117
#7  call_function (oparg=<optimised out>, pp_stack=<optimised out>) at ../Python/ceval.c:4042
#8  PyEval_EvalFrameEx () at ../Python/ceval.c:2667
#9  0x00000000004cb212 in fast_function (nk=<optimised out>, na=<optimised out>, n=<optimised out>, pp_stack=<optimised out>, func=<optimised out>) at ../Python/ceval.c:4107
#10 call_function (oparg=<optimised out>, pp_stack=<optimised out>) at ../Python/ceval.c:4042
#11 PyEval_EvalFrameEx () at ../Python/ceval.c:2667
#12 0x00000000004cb212 in fast_function (nk=<optimised out>, na=<optimised out>, n=<optimised out>, pp_stack=<optimised out>, func=<optimised out>) at ../Python/ceval.c:4107
#13 call_function (oparg=<optimised out>, pp_stack=<optimised out>) at ../Python/ceval.c:4042
#14 PyEval_EvalFrameEx () at ../Python/ceval.c:2667
#15 0x00000000004cb212 in fast_function (nk=<optimised out>, na=<optimised out>, n=<optimised out>, pp_stack=<optimised out>, func=<optimised out>) at ../Python/ceval.c:4107
#16 call_function (oparg=<optimised out>, pp_stack=<optimised out>) at ../Python/ceval.c:4042
#17 PyEval_EvalFrameEx () at ../Python/ceval.c:2667
#18 0x00000000004e6970 in PyEval_EvalCodeEx (closure=<optimised out>, defcount=<optimised out>, defs=<optimised out>, kwcount=<optimised out>, kws=<optimised out>, argcount=<optimised out>, 
    args=<optimised out>, locals=<optimised out>, globals=<optimised out>, co=<optimised out>) at ../Python/ceval.c:3253
#19 function_call.lto_priv () at ../Objects/funcobject.c:526
#20 0x0000000000505128 in PyObject_Call (kw=<optimised out>, arg=<optimised out>, func=<optimised out>) at ../Objects/abstract.c:2529
#21 instancemethod_call.lto_priv () at ../Objects/classobject.c:2602
#22 0x00000000005610fa in PyObject_Call (kw=0x0, 
    arg=(Frame 0xb3fa60, for file pyglet/media/__init__.py, line 658, in seek (self=<StaticMemorySource(audio_format=<AudioFormat(channels=1, sample_size=8, bytes_per_sample=1, sample_rate=11025, bytes_per_second=11025) at remote 0x7fffedb40d10>, _max_offset=55125, _file=<StringIO(softspace=0, buflist=[], pos=11025, len=55125, closed=False, buf='aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa...(truncated), func=<instancemethod at remote 0x7ffff61c3b40>) at ../Objects/abstract.c:2529
#23 PyEval_CallObjectWithKeywords (kw=0x0, 
    arg=(Frame 0xb3fa60, for file pyglet/media/__init__.py, line 658, in seek (self=<StaticMemorySource(audio_format=<AudioFormat(channels=1, sample_size=8, bytes_per_sample=1, sample_rate=11025, bytes_per_second=11025) at remote 0x7fffedb40d10>, _max_offset=55125, _file=<StringIO(softspace=0, buflist=[], pos=11025, len=55125, closed=False, buf='aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa...(truncated), func=<instancemethod at remote 0x7ffff61c3b40>) at ../Python/ceval.c:3890
#24 call_trampoline.isra.0.lto_priv () at ../Python/sysmodule.c:325
#25 0x0000000000560b19 in trace_trampoline (arg=<optimised out>, what=<optimised out>, 
    frame=Frame 0xb3fa60, for file pyglet/media/__init__.py, line 658, in seek (self=<StaticMemorySource(audio_format=<AudioFormat(channels=1, sample_size=8, bytes_per_sample=1, sample_rate=11025, bytes_per_second=11025) at remote 0x7fffedb40d10>, _max_offset=55125, _file=<StringIO(softspace=0, buflist=[], pos=11025, len=55125, closed=False, buf='aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa...(truncated), self=<optimised out>) at ../Python/sysmodule.c:367
#26 call_trace.lto_priv () at ../Python/ceval.c:3692
#27 0x00000000004d1006 in PyEval_EvalFrameEx () at ../Python/ceval.c:2967
#28 0x00000000004cb212 in fast_function (nk=<optimised out>, na=<optimised out>, n=<optimised out>, pp_stack=<optimised out>, func=<optimised out>) at ../Python/ceval.c:4107
#29 call_function (oparg=<optimised out>, pp_stack=<optimised out>) at ../Python/ceval.c:4042
#30 PyEval_EvalFrameEx () at ../Python/ceval.c:2667
#31 0x00000000004cb212 in fast_function (nk=<optimised out>, na=<optimised out>, n=<optimised out>, pp_stack=<optimised out>, func=<optimised out>) at ../Python/ceval.c:4107
#32 call_function (oparg=<optimised out>, pp_stack=<optimised out>) at ../Python/ceval.c:4042
#33 PyEval_EvalFrameEx () at ../Python/ceval.c:2667
---Type <return> to continue, or q <return> to quit---
#34 0x00000000004e6970 in PyEval_EvalCodeEx (closure=<optimised out>, defcount=<optimised out>, defs=<optimised out>, kwcount=<optimised out>, kws=<optimised out>, argcount=<optimised out>, 
    args=<optimised out>, locals=<optimised out>, globals=<optimised out>, co=<optimised out>) at ../Python/ceval.c:3253
#35 function_call.lto_priv () at ../Objects/funcobject.c:526
#36 0x00000000004cd00f in PyObject_Call (kw=<optimised out>, arg=<optimised out>, func=<optimised out>) at ../Objects/abstract.c:2529
#37 ext_do_call (nk=<optimised out>, na=<optimised out>, flags=<optimised out>, pp_stack=<optimised out>, func=<optimised out>) at ../Python/ceval.c:4334
#38 PyEval_EvalFrameEx () at ../Python/ceval.c:2706
#39 0x00000000004e6970 in PyEval_EvalCodeEx (closure=<optimised out>, defcount=<optimised out>, defs=<optimised out>, kwcount=<optimised out>, kws=<optimised out>, argcount=<optimised out>, 
    args=<optimised out>, locals=<optimised out>, globals=<optimised out>, co=<optimised out>) at ../Python/ceval.c:3253
#40 function_call.lto_priv () at ../Objects/funcobject.c:526
#41 0x0000000000505128 in PyObject_Call (kw=<optimised out>, arg=<optimised out>, func=<optimised out>) at ../Objects/abstract.c:2529
#42 instancemethod_call.lto_priv () at ../Objects/classobject.c:2602
#43 0x000000000057250d in PyObject_Call (kw=0x0, 
    arg=(<TextTestResult(_original_stdout=<file at remote 0x7ffff7fa5150>, dots=True, skipped=[], _mirrorOutput=False, stream=<_WritelnDecorator(stream=<file at remote 0x7ffff7fa51e0>) at remote 0x7ffff61b6110>, testsRun=13, buffer=None, _original_stderr=<file at remote 0x7ffff7fa51e0>, showAll=False, _stdout_buffer=None, _stderr_buffer=None, _moduleSetUpFailed=False, expectedFailures=[], errors=[], descriptions=True, _previousTestClass=<type at remote 0xac1d50>, unexpectedSuccesses=[], failures=[], _testRunEntered=True, shouldStop=False, failfast=None) at remote 0x7ffff61b6150>,), func=<instancemethod at remote 0x7ffff631dd20>) at ../Objects/abstract.c:2529
#44 slot_tp_call.lto_priv () at ../Objects/typeobject.c:5432
#45 0x00000000004cb769 in PyObject_Call (kw=<optimised out>, arg=<optimised out>, func=<optimised out>) at ../Objects/abstract.c:2529
#46 do_call (nk=<optimised out>, na=<optimised out>, pp_stack=<optimised out>, func=<optimised out>) at ../Python/ceval.c:4239
#47 call_function (oparg=<optimised out>, pp_stack=<optimised out>) at ../Python/ceval.c:4044
#48 PyEval_EvalFrameEx () at ../Python/ceval.c:2667
#49 0x00000000004e6970 in PyEval_EvalCodeEx (closure=<optimised out>, defcount=<optimised out>, defs=<optimised out>, kwcount=<optimised out>, kws=<optimised out>, argcount=<optimised out>, 
    args=<optimised out>, locals=<optimised out>, globals=<optimised out>, co=<optimised out>) at ../Python/ceval.c:3253
#50 function_call.lto_priv () at ../Objects/funcobject.c:526
#51 0x00000000004cd00f in PyObject_Call (kw=<optimised out>, arg=<optimised out>, func=<optimised out>) at ../Objects/abstract.c:2529
#52 ext_do_call (nk=<optimised out>, na=<optimised out>, flags=<optimised out>, pp_stack=<optimised out>, func=<optimised out>) at ../Python/ceval.c:4334
#53 PyEval_EvalFrameEx () at ../Python/ceval.c:2706
#54 0x00000000004e6970 in PyEval_EvalCodeEx (closure=<optimised out>, defcount=<optimised out>, defs=<optimised out>, kwcount=<optimised out>, kws=<optimised out>, argcount=<optimised out>, 
    args=<optimised out>, locals=<optimised out>, globals=<optimised out>, co=<optimised out>) at ../Python/ceval.c:3253
#55 function_call.lto_priv () at ../Objects/funcobject.c:526
#56 0x0000000000505128 in PyObject_Call (kw=<optimised out>, arg=<optimised out>, func=<optimised out>) at ../Objects/abstract.c:2529
#57 instancemethod_call.lto_priv () at ../Objects/classobject.c:2602
#58 0x000000000057250d in PyObject_Call (kw=0x0, 
    arg=(<TextTestResult(_original_stdout=<file at remote 0x7ffff7fa5150>, dots=True, skipped=[], _mirrorOutput=False, stream=<_WritelnDecorator(stream=<file at remote 0x7ffff7fa51e0>) at remote 0x7ffff61b6110>, testsRun=13, buffer=None, _original_stderr=<file at remote 0x7ffff7fa51e0>, showAll=False, _stdout_buffer=None, _stderr_buffer=None, _moduleSetUpFailed=False, expectedFailures=[], errors=[], descriptions=True, _previousTestClass=<type at remote 0xac1d50>, unexpectedSuccesses=[], failures=[], _testRunEntered=True, shouldStop=False, failfast=None) at remote 0x7ffff61b6150>,), func=<instancemethod at remote 0x7ffff7f03cd0>) at ../Objects/abstract.c:2529
#59 slot_tp_call.lto_priv () at ../Objects/typeobject.c:5432
#60 0x00000000004cb769 in PyObject_Call (kw=<optimised out>, arg=<optimised out>, func=<optimised out>) at ../Objects/abstract.c:2529
#61 do_call (nk=<optimised out>, na=<optimised out>, pp_stack=<optimised out>, func=<optimised out>) at ../Python/ceval.c:4239
#62 call_function (oparg=<optimised out>, pp_stack=<optimised out>) at ../Python/ceval.c:4044
#63 PyEval_EvalFrameEx () at ../Python/ceval.c:2667
#64 0x00000000004e6970 in PyEval_EvalCodeEx (closure=<optimised out>, defcount=<optimised out>, defs=<optimised out>, kwcount=<optimised out>, kws=<optimised out>, argcount=<optimised out>, 
    args=<optimised out>, locals=<optimised out>, globals=<optimised out>, co=<optimised out>) at ../Python/ceval.c:3253
#65 function_call.lto_priv () at ../Objects/funcobject.c:526
#66 0x00000000004cd00f in PyObject_Call (kw=<optimised out>, arg=<optimised out>, func=<optimised out>) at ../Objects/abstract.c:2529
#67 ext_do_call (nk=<optimised out>, na=<optimised out>, flags=<optimised out>, pp_stack=<optimised out>, func=<optimised out>) at ../Python/ceval.c:4334
#68 PyEval_EvalFrameEx () at ../Python/ceval.c:2706
#69 0x00000000004e6970 in PyEval_EvalCodeEx (closure=<optimised out>, defcount=<optimised out>, defs=<optimised out>, kwcount=<optimised out>, kws=<optimised out>, argcount=<optimised out>, 
    args=<optimised out>, locals=<optimised out>, globals=<optimised out>, co=<optimised out>) at ../Python/ceval.c:3253
#70 function_call.lto_priv () at ../Objects/funcobject.c:526
#71 0x0000000000505128 in PyObject_Call (kw=<optimised out>, arg=<optimised out>, func=<optimised out>) at ../Objects/abstract.c:2529
#72 instancemethod_call.lto_priv () at ../Objects/classobject.c:2602
#73 0x000000000057250d in PyObject_Call (kw=0x0, 
---Type <return> to continue, or q <return> to quit---
    arg=(<TextTestResult(_original_stdout=<file at remote 0x7ffff7fa5150>, dots=True, skipped=[], _mirrorOutput=False, stream=<_WritelnDecorator(stream=<file at remote 0x7ffff7fa51e0>) at remote 0x7ffff61b6110>, testsRun=13, buffer=None, _original_stderr=<file at remote 0x7ffff7fa51e0>, showAll=False, _stdout_buffer=None, _stderr_buffer=None, _moduleSetUpFailed=False, expectedFailures=[], errors=[], descriptions=True, _previousTestClass=<type at remote 0xac1d50>, unexpectedSuccesses=[], failures=[], _testRunEntered=True, shouldStop=False, failfast=None) at remote 0x7ffff61b6150>,), func=<instancemethod at remote 0x7ffff67b63c0>) at ../Objects/abstract.c:2529
#74 slot_tp_call.lto_priv () at ../Objects/typeobject.c:5432
#75 0x00000000004cb769 in PyObject_Call (kw=<optimised out>, arg=<optimised out>, func=<optimised out>) at ../Objects/abstract.c:2529
#76 do_call (nk=<optimised out>, na=<optimised out>, pp_stack=<optimised out>, func=<optimised out>) at ../Python/ceval.c:4239
#77 call_function (oparg=<optimised out>, pp_stack=<optimised out>) at ../Python/ceval.c:4044
#78 PyEval_EvalFrameEx () at ../Python/ceval.c:2667
#79 0x00000000004e6970 in PyEval_EvalCodeEx (closure=<optimised out>, defcount=<optimised out>, defs=<optimised out>, kwcount=<optimised out>, kws=<optimised out>, argcount=<optimised out>, 
    args=<optimised out>, locals=<optimised out>, globals=<optimised out>, co=<optimised out>) at ../Python/ceval.c:3253
#80 function_call.lto_priv () at ../Objects/funcobject.c:526
#81 0x00000000004cd00f in PyObject_Call (kw=<optimised out>, arg=<optimised out>, func=<optimised out>) at ../Objects/abstract.c:2529
#82 ext_do_call (nk=<optimised out>, na=<optimised out>, flags=<optimised out>, pp_stack=<optimised out>, func=<optimised out>) at ../Python/ceval.c:4334
#83 PyEval_EvalFrameEx () at ../Python/ceval.c:2706
#84 0x00000000004e6970 in PyEval_EvalCodeEx (closure=<optimised out>, defcount=<optimised out>, defs=<optimised out>, kwcount=<optimised out>, kws=<optimised out>, argcount=<optimised out>, 
    args=<optimised out>, locals=<optimised out>, globals=<optimised out>, co=<optimised out>) at ../Python/ceval.c:3253
#85 function_call.lto_priv () at ../Objects/funcobject.c:526
#86 0x0000000000505128 in PyObject_Call (kw=<optimised out>, arg=<optimised out>, func=<optimised out>) at ../Objects/abstract.c:2529
#87 instancemethod_call.lto_priv () at ../Objects/classobject.c:2602
#88 0x000000000057250d in PyObject_Call (kw=0x0, 
    arg=(<TextTestResult(_original_stdout=<file at remote 0x7ffff7fa5150>, dots=True, skipped=[], _mirrorOutput=False, stream=<_WritelnDecorator(stream=<file at remote 0x7ffff7fa51e0>) at remote 0x7ffff61b6110>, testsRun=13, buffer=None, _original_stderr=<file at remote 0x7ffff7fa51e0>, showAll=False, _stdout_buffer=None, _stderr_buffer=None, _moduleSetUpFailed=False, expectedFailures=[], errors=[], descriptions=True, _previousTestClass=<type at remote 0xac1d50>, unexpectedSuccesses=[], failures=[], _testRunEntered=True, shouldStop=False, failfast=None) at remote 0x7ffff61b6150>,), func=<instancemethod at remote 0x7ffff67b6370>) at ../Objects/abstract.c:2529
#89 slot_tp_call.lto_priv () at ../Objects/typeobject.c:5432
#90 0x00000000004cb769 in PyObject_Call (kw=<optimised out>, arg=<optimised out>, func=<optimised out>) at ../Objects/abstract.c:2529
#91 do_call (nk=<optimised out>, na=<optimised out>, pp_stack=<optimised out>, func=<optimised out>) at ../Python/ceval.c:4239
#92 call_function (oparg=<optimised out>, pp_stack=<optimised out>) at ../Python/ceval.c:4044
#93 PyEval_EvalFrameEx () at ../Python/ceval.c:2667
#94 0x00000000004cb212 in fast_function (nk=<optimised out>, na=<optimised out>, n=<optimised out>, pp_stack=<optimised out>, func=<optimised out>) at ../Python/ceval.c:4107
#95 call_function (oparg=<optimised out>, pp_stack=<optimised out>) at ../Python/ceval.c:4042
#96 PyEval_EvalFrameEx () at ../Python/ceval.c:2667
#97 0x00000000004cb212 in fast_function (nk=<optimised out>, na=<optimised out>, n=<optimised out>, pp_stack=<optimised out>, func=<optimised out>) at ../Python/ceval.c:4107
#98 call_function (oparg=<optimised out>, pp_stack=<optimised out>) at ../Python/ceval.c:4042
#99 PyEval_EvalFrameEx () at ../Python/ceval.c:2667
#100 0x00000000004e6970 in PyEval_EvalCodeEx (closure=<optimised out>, defcount=<optimised out>, defs=<optimised out>, kwcount=<optimised out>, kws=<optimised out>, argcount=<optimised out>, 
    args=<optimised out>, locals=<optimised out>, globals=<optimised out>, co=<optimised out>) at ../Python/ceval.c:3253
#101 function_call.lto_priv () at ../Objects/funcobject.c:526
#102 0x0000000000505128 in PyObject_Call (kw=<optimised out>, arg=<optimised out>, func=<optimised out>) at ../Objects/abstract.c:2529
#103 instancemethod_call.lto_priv () at ../Objects/classobject.c:2602
#104 0x0000000000504154 in PyObject_Call (kw={'module': None}, arg=(), func=<instancemethod at remote 0x7ffff7ec1320>) at ../Objects/abstract.c:2529
#105 slot_tp_init.lto_priv () at ../Objects/typeobject.c:5692
#106 0x00000000004bb18b in type_call.lto_priv () at ../Objects/typeobject.c:745
#107 0x00000000004cb769 in PyObject_Call (kw=<optimised out>, arg=<optimised out>, func=<optimised out>) at ../Objects/abstract.c:2529
#108 do_call (nk=<optimised out>, na=<optimised out>, pp_stack=<optimised out>, func=<optimised out>) at ../Python/ceval.c:4239
#109 call_function (oparg=<optimised out>, pp_stack=<optimised out>) at ../Python/ceval.c:4044
#110 PyEval_EvalFrameEx () at ../Python/ceval.c:2667
#111 0x00000000004c93d1 in PyEval_EvalCodeEx () at ../Python/ceval.c:3253
#112 0x00000000004c8c06 in PyEval_EvalCode (co=<optimised out>, globals=<optimised out>, locals=<optimised out>) at ../Python/ceval.c:667
#113 0x00000000004d1638 in exec_statement (locals=<optimised out>, globals=<optimised out>, prog=<optimised out>, f=<optimised out>) at ../Python/ceval.c:4718
#114 PyEval_EvalFrameEx () at ../Python/ceval.c:1881
#115 0x00000000004c93d1 in PyEval_EvalCodeEx () at ../Python/ceval.c:3253
#116 0x00000000004caf49 in fast_function (nk=<optimised out>, na=<optimised out>, n=<optimised out>, pp_stack=<optimised out>, func=<optimised out>) at ../Python/ceval.c:4117
---Type <return> to continue, or q <return> to quit---
#117 call_function (oparg=<optimised out>, pp_stack=<optimised out>) at ../Python/ceval.c:4042
#118 PyEval_EvalFrameEx () at ../Python/ceval.c:2667
#119 0x00000000004e6970 in PyEval_EvalCodeEx (closure=<optimised out>, defcount=<optimised out>, defs=<optimised out>, kwcount=<optimised out>, kws=<optimised out>, argcount=<optimised out>, 
    args=<optimised out>, locals=<optimised out>, globals=<optimised out>, co=<optimised out>) at ../Python/ceval.c:3253
#120 function_call.lto_priv () at ../Objects/funcobject.c:526
#121 0x00000000004b3ffe in PyObject_Call () at ../Objects/abstract.c:2529
#122 0x000000000053cae6 in RunModule.lto_priv.1258 () at ../Modules/main.c:192
#123 0x0000000000498965 in Py_Main () at ../Modules/main.c:587
#124 0x00007ffff7819ec5 in __libc_start_main (main=0x4982c0 <main>, argc=4, argv=0x7fffffffdb38, init=<optimised out>, fini=<optimised out>, rtld_fini=<optimised out>, stack_end=0x7fffffffdb28)
    at libc-start.c:287
#125 0x00000000004981ec in _start ()
(gdb) info sharedlibrary 
From                To                  Syms Read   Shared Object Library
0x00007ffff7ddaae0  0x00007ffff7df54a0  Yes         /lib64/ld-linux-x86-64.so.2
0x00007ffff7bc19f0  0x00007ffff7bcddf1  Yes         /lib/x86_64-linux-gnu/libpthread.so.0
0x00007ffff78174a0  0x00007ffff795b933  Yes         /lib/x86_64-linux-gnu/libc.so.6
0x00007ffff75f4ed0  0x00007ffff75f59ce  Yes         /lib/x86_64-linux-gnu/libdl.so.2
0x00007ffff73f1f10  0x00007ffff73f2804  Yes         /lib/x86_64-linux-gnu/libutil.so.1
0x00007ffff71d9e00  0x00007ffff71e9bf8  Yes (*)     /lib/x86_64-linux-gnu/libz.so.1
0x00007ffff6ed7610  0x00007ffff6f46946  Yes         /lib/x86_64-linux-gnu/libm.so.6
0x00007ffff6540fd0  0x00007ffff6551d84  Yes         /usr/lib/python2.7/lib-dynload/_ctypes.x86_64-linux-gnu.so
0x00007ffff6333650  0x00007ffff6337d5a  Yes (*)     /usr/lib/x86_64-linux-gnu/libffi.so.6
0x00007ffff5f2bd90  0x00007ffff5f2ea6b  Yes         /usr/lib/python2.7/lib-dynload/_hashlib.x86_64-linux-gnu.so
0x00007ffff5ba5e40  0x00007ffff5c9a34f  Yes (*)     /lib/x86_64-linux-gnu/libcrypto.so.1.0.0
0x00007ffff5887140  0x00007ffff58e42d2  Yes (*)     /usr/lib/x86_64-linux-gnu/mesa/libGL.so.1
0x00007ffff5647b90  0x00007ffff565ffb9  Yes (*)     /lib/x86_64-linux-gnu/libexpat.so.1
0x00007ffff5424560  0x00007ffff542df83  Yes (*)     /usr/lib/x86_64-linux-gnu/libglapi.so.0
0x00007ffff520c580  0x00007ffff5215ce0  Yes (*)     /usr/lib/x86_64-linux-gnu/libXext.so.6
0x00007ffff5006b90  0x00007ffff500749b  Yes (*)     /usr/lib/x86_64-linux-gnu/libXdamage.so.1
0x00007ffff4e01530  0x00007ffff4e03756  Yes (*)     /usr/lib/x86_64-linux-gnu/libXfixes.so.3
0x00007ffff4bfe5e0  0x00007ffff4bfe6fb  Yes (*)     /usr/lib/x86_64-linux-gnu/libX11-xcb.so.1
0x00007ffff48dd850  0x00007ffff49621cc  Yes (*)     /usr/lib/x86_64-linux-gnu/libX11.so.6
0x00007ffff46b7fb0  0x00007ffff46bdec5  Yes (*)     /usr/lib/x86_64-linux-gnu/libxcb-glx.so.0
0x00007ffff44aa860  0x00007ffff44ab575  Yes (*)     /usr/lib/x86_64-linux-gnu/libxcb-dri2.so.0
0x00007ffff42a6ce0  0x00007ffff42a72e3  Yes (*)     /usr/lib/x86_64-linux-gnu/libxcb-dri3.so.0
0x00007ffff40a3c40  0x00007ffff40a4348  Yes (*)     /usr/lib/x86_64-linux-gnu/libxcb-present.so.0
0x00007ffff3e9eea0  0x00007ffff3ea070e  Yes (*)     /usr/lib/x86_64-linux-gnu/libxcb-sync.so.1
0x00007ffff3c87620  0x00007ffff3c935e5  Yes (*)     /usr/lib/x86_64-linux-gnu/libxcb.so.1
0x00007ffff3a7c990  0x00007ffff3a7cc3c  Yes (*)     /usr/lib/x86_64-linux-gnu/libxshmfence.so.1
0x00007ffff3876f40  0x00007ffff38796f6  Yes (*)     /usr/lib/x86_64-linux-gnu/libXxf86vm.so.1
0x00007ffff366cef0  0x00007ffff3671e13  Yes (*)     /usr/lib/x86_64-linux-gnu/libdrm.so.2
0x00007ffff3466e50  0x00007ffff3467acc  Yes (*)     /usr/lib/x86_64-linux-gnu/libXau.so.6
0x00007ffff3261390  0x00007ffff3262c97  Yes (*)     /usr/lib/x86_64-linux-gnu/libXdmcp.so.6
0x00007ffff2ff66f0  0x00007ffff3047a89  Yes (*)     /usr/lib/x86_64-linux-gnu/libGLU.so.1
0x00007ffff2d3e990  0x00007ffff2dab50f  Yes (*)     /usr/lib/x86_64-linux-gnu/libstdc++.so.6
0x00007ffff2aceaf0  0x00007ffff2ade9d5  Yes (*)     /lib/x86_64-linux-gnu/libgcc_s.so.1
0x00007ffff2287af0  0x00007ffff22883ec  Yes (*)     /usr/lib/x86_64-linux-gnu/libXinerama.so.1
0x00007ffff1ff7f30  0x00007ffff2000b2c  Yes (*)     /lib/x86_64-linux-gnu/libudev.so.1
0x00007ffff1dd6b30  0x00007ffff1de973b  Yes (*)     /lib/x86_64-linux-gnu/libselinux.so.1
0x00007ffff1bcb350  0x00007ffff1bce2ac  Yes         /lib/x86_64-linux-gnu/librt.so.1
0x00007ffff195d600  0x00007ffff19ab795  Yes (*)     /lib/x86_64-linux-gnu/libpcre.so.3
0x00007ffff0e11ff0  0x00007ffff138b93a  Yes (*)     /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
0x00007ffff0ba3510  0x00007ffff0ba6248  Yes (*)     /usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2
0x00007ffff098ea90  0x00007ffff099ca1a  Yes (*)     /usr/lib/x86_64-linux-gnu/libelf.so.1
0x00007ffff0780990  0x00007ffff0788c54  Yes (*)     /usr/lib/x86_64-linux-gnu/libdrm_radeon.so.1
0x00007fffeedac710  0x00007fffefe2be9f  Yes (*)     /usr/lib/x86_64-linux-gnu/libLLVM-3.5.so.1
0x00007fffee7ef4b0  0x00007fffee804f00  Yes (*)     /usr/lib/x86_64-linux-gnu/libedit.so.2
0x00007fffee5c83d0  0x00007fffee5d4508  Yes (*)     /lib/x86_64-linux-gnu/libtinfo.so.5
0x00007fffedb83bf0  0x00007fffedbb63c8  Yes (*)     /usr/lib/x86_64-linux-gnu/libtxc_dxtn.so
0x00007fffed8be820  0x00007fffed8c0285  Yes         /usr/lib/python2.7/lib-dynload/readline.x86_64-linux-gnu.so
0x00007fffed688f90  0x00007fffed6aa395  Yes (*)     /lib/x86_64-linux-gnu/libreadline.so.6
(*): Shared library is missing debugging information.
(gdb)