(gdb) back
#0  0x00000000004c9aad in ?? ()
#1  0x00000000004a10c0 in PyDict_SetItem ()
#2  0x0000000000481edc in _PyObject_GenericSetAttrWithDict ()
#3  0x000000000048218c in PyObject_SetAttr ()
#4  0x0000000000460778 in PyEval_EvalFrameEx ()
#5  0x0000000000467209 in PyEval_EvalCodeEx ()
#6  0x00000000004a9fea in ?? ()
#7  0x000000000048249d in ?? ()
#8  0x0000000000491bb4 in ?? ()
#9  0x00000000004aac6e in ?? ()
#10 0x00000000004600be in PyEval_EvalFrameEx ()
#11 0x0000000000467209 in PyEval_EvalCodeEx ()
#12 0x000000000045ff77 in PyEval_EvalFrameEx ()
#13 0x0000000000467209 in PyEval_EvalCodeEx ()
#14 0x000000000045ff77 in PyEval_EvalFrameEx ()
#15 0x0000000000467209 in PyEval_EvalCodeEx ()
#16 0x000000000045ff77 in PyEval_EvalFrameEx ()
#17 0x0000000000467209 in PyEval_EvalCodeEx ()
#18 0x00000000004aa118 in ?? ()
#19 0x000000000046172e in PyEval_EvalFrameEx ()
#20 0x0000000000467209 in PyEval_EvalCodeEx ()
#21 0x000000000045ff77 in PyEval_EvalFrameEx ()
#22 0x0000000000467209 in PyEval_EvalCodeEx ()
---Type <return> to continue, or q <return> to quit---
#23 0x00000000004d0242 in PyEval_EvalCode ()
#24 0x00000000005102bb in ?? ()
#25 0x000000000044a466 in PyRun_FileExFlags ()
#26 0x000000000044a97a in PyRun_SimpleFileExFlags ()
#27 0x000000000044b6bc in Py_Main ()
#28 0x00007ffff6f0576d in __libc_start_main ()
   from /lib/x86_64-linux-gnu/libc.so.6
#29 0x00000000004ce0ad in _start ()
(gdb)