Comment 1 for bug 1552779

Best I could do in terms of getting a traceback:

(gdb) bt
#0 0x00007f127bd64f82 in epoll_wait () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x0000000000512b8e in ?? ()
#2 0x00000000004b5d01 in PyEval_EvalFrameEx ()
#3 0x00000000004b6257 in PyEval_EvalFrameEx ()
#4 0x00000000004bc463 in PyEval_EvalCodeEx ()
#5 0x00000000004b645b in PyEval_EvalFrameEx ()
#6 0x00000000004bc463 in PyEval_EvalCodeEx ()
#7 0x00000000004491df in ?? ()
#8 0x000000000041b10a in PyObject_Call ()
#9 0x00000000004306be in ?? ()
#10 0x000000000041b10a in PyObject_Call ()
#11 0x00000000004b54d6 in PyEval_CallObjectWithKeywords ()
#12 0x00007f127b652a66 in ?? () from /usr/lib/python2.7/dist-packages/greenlet.so
#13 0x00007f127b6523b0 in ?? () from /usr/lib/python2.7/dist-packages/greenlet.so
#14 0x00007f127b652f36 in ?? () from /usr/lib/python2.7/dist-packages/greenlet.so
#15 0x00000000004b5d01 in PyEval_EvalFrameEx ()
#16 0x00000000004b6257 in PyEval_EvalFrameEx ()
#17 0x00000000004bc463 in PyEval_EvalCodeEx ()
#18 0x00000000004b645b in PyEval_EvalFrameEx ()
#19 0x00000000004b6257 in PyEval_EvalFrameEx ()
#20 0x00000000004b6257 in PyEval_EvalFrameEx ()
#21 0x00000000004b6257 in PyEval_EvalFrameEx ()
#22 0x00000000004b6257 in PyEval_EvalFrameEx ()
#23 0x00000000004b6257 in PyEval_EvalFrameEx ()
#24 0x00000000004bc463 in PyEval_EvalCodeEx ()
#25 0x00000000004b645b in PyEval_EvalFrameEx ()
#26 0x00000000004bc463 in PyEval_EvalCodeEx ()
#27 0x00000000004b645b in PyEval_EvalFrameEx ()
#28 0x00000000004b6257 in PyEval_EvalFrameEx ()
#29 0x00000000004bc463 in PyEval_EvalCodeEx ()
#30 0x00000000004bcf12 in PyEval_EvalCode ()
#31 0x00000000004dc202 in ?? ()
#32 0x00000000004dcdf4 in PyRun_FileExFlags ()
#33 0x00000000004dd8fe in PyRun_SimpleFileExFlags ()
#34 0x00000000004ee202 in Py_Main ()
#35 0x00007f127bc9276d in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6
#36 0x000000000041cbd9 in _start ()

Not really useful I guess.