$ cat cx.py
import cx_Oracle
$
$ /usr/local/bin/gdb python3.4
GNU gdb (GDB) 7.11.1 [GDB v7.11.1 for FreeBSD]
Copyright (C) 2016 Free Software Foundation, Inc.
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Reading symbols from python3.4...done.
(gdb) run cx.py
Starting program: /usr/local/bin/python3.4 cx.py
Program received signal SIGSEGV, Segmentation fault.
0x0000000805f0dc8a in __strrchr_sse2 () from /usr/local/oracle/instantclient_11_2/libc.so.6
(gdb) bt
#0 0x0000000805f0dc8a in __strrchr_sse2 () from /usr/local/oracle/instantclient_11_2/libc.so.6
#1 0x0000000805f737cb in __init_misc () from /usr/local/oracle/instantclient_11_2/libc.so.6
#2 0x0000000805ea9c00 in _init () from /usr/local/oracle/instantclient_11_2/libc.so.6
#3 0x0000000800605a9f in ?? () from /libexec/ld-elf.so.1
#4 0x000000080060a437 in ?? () from /libexec/ld-elf.so.1
#5 0x0000000800606ea0 in ?? () from /libexec/ld-elf.so.1
#6 0x0000000800eaf89e in _PyImport_GetDynLoadFunc (shortname=0x80078b370 "cx_Oracle", pathname=0x800a7a8f0 "/usr/local/lib/python3.4/site-packages/cx_Oracle.so", fp=0x0) at ./Python/dynload_shlib.c:95
#7 0x0000000800e66389 in _PyImport_LoadDynamicModule (name=0x800a7b890, path=0x8007a5170, fp=0x0) at ./Python/importdl.c:69
#8 0x0000000800e655b2 in _imp_load_dynamic_impl (module=0x8006e92d8, name=0x800a7b890, path=0x8007a5170, file=0x0) at Python/import.c:2271
#9 0x0000000800e6513d in _imp_load_dynamic (module=0x8006e92d8, args=0x800a7f2f8) at Python/import.c:2247
#10 0x0000000800cfa8b8 in PyCFunction_Call (func=0x800713758, arg=0x800a7f2f8, kw=0x800a7f288) at Objects/methodobject.c:93
#11 0x0000000800e32256 in ext_do_call (func=0x800713758, pp_stack=0x7ffffffebe80, flags=3, na=0, nk=0) at Python/ceval.c:4558
#12 0x0000000800e2a4b1 in PyEval_EvalFrameEx (f=0x8007c8838, throwflag=0) at Python/ceval.c:2878
#13 0x0000000800e1778d in PyEval_EvalCodeEx (_co=0x8006c7040, globals=0x8006ff838, locals=0x0, args=0x8024b1770, argcount=3, kws=0x8024b1788, kwcount=0, defs=0x0, defcount=0, kwdefs=0x0, closure=0x0) at Python/ceval.c:3588
#14 0x0000000800e343dd in fast_function (func=0x8007043f0, pp_stack=0x7ffffffee560, n=3, na=3, nk=0) at Python/ceval.c:4344
#15 0x0000000800e3193b in call_function (pp_stack=0x7ffffffee560, oparg=3) at Python/ceval.c:4262
#16 0x0000000800e29f80 in PyEval_EvalFrameEx (f=0x8024b15b8, throwflag=0) at Python/ceval.c:2838
#17 0x0000000800e1778d in PyEval_EvalCodeEx (_co=0x8006ec100, globals=0x8006ff838, locals=0x0, args=0x800a7bc50, argcount=2, kws=0x80064f080, kwcount=0, defs=0x0, defcount=0, kwdefs=0x0, closure=0x0) at Python/ceval.c:3588
#18 0x0000000800cc284c in function_call (func=0x80070f788, arg=0x800a7bc28, kw=0x800a6f058) at Objects/funcobject.c:632
#19 0x0000000800c6e6ca in PyObject_Call (func=0x80070f788, arg=0x800a7bc28, kw=0x800a6f058) at Objects/abstract.c:2058
#20 0x0000000800e32270 in ext_do_call (func=0x80070f788, pp_stack=0x7fffffff0be0, flags=3, na=2, nk=0) at Python/ceval.c:4561
#21 0x0000000800e2a4b1 in PyEval_EvalFrameEx (f=0x80247f238, throwflag=0) at Python/ceval.c:2878
#22 0x0000000800e1778d in PyEval_EvalCodeEx (_co=0x8006c7580, globals=0x8006ff838, locals=0x0, args=0x8024579d8, argcount=2, kws=0x8024579e8, kwcount=0, defs=0x80070d700, defcount=1, kwdefs=0x0, closure=0x80070d670) at Python/ceval.c:3588
#23 0x0000000800e343dd in fast_function (func=0x80070f840, pp_stack=0x7fffffff32c0, n=2, na=2, nk=0) at Python/ceval.c:4344
#24 0x0000000800e3193b in call_function (pp_stack=0x7fffffff32c0, oparg=1) at Python/ceval.c:4262
#25 0x0000000800e29f80 in PyEval_EvalFrameEx (f=0x802457838, throwflag=0) at Python/ceval.c:2838
#26 0x0000000800e34245 in fast_function (func=0x800705eb8, pp_stack=0x7fffffff5710, n=1, na=1, nk=0) at Python/ceval.c:4334
#27 0x0000000800e3193b in call_function (pp_stack=0x7fffffff5710, oparg=0) at Python/ceval.c:4262
#28 0x0000000800e29f80 in PyEval_EvalFrameEx (f=0x8024b8b38, throwflag=0) at Python/ceval.c:2838
#29 0x0000000800e34245 in fast_function (func=0x800705f70, pp_stack=0x7fffffff7b60, n=1, na=1, nk=0) at Python/ceval.c:4334
#30 0x0000000800e3193b in call_function (pp_stack=0x7fffffff7b60, oparg=0) at Python/ceval.c:4262
#31 0x0000000800e29f80 in PyEval_EvalFrameEx (f=0x80245db38, throwflag=0) at Python/ceval.c:2838
#32 0x0000000800e34245 in fast_function (func=0x8007146d0, pp_stack=0x7fffffff9fb0, n=2, na=2, nk=0) at Python/ceval.c:4334
#33 0x0000000800e3193b in call_function (pp_stack=0x7fffffff9fb0, oparg=2) at Python/ceval.c:4262
#34 0x0000000800e29f80 in PyEval_EvalFrameEx (f=0x8024b88b8, throwflag=0) at Python/ceval.c:2838
#35 0x0000000800e1778d in PyEval_EvalCodeEx (_co=0x8006f8b80, globals=0x8006ff838, locals=0x0, args=0x8007a6080, argcount=2, kws=0x0, kwcount=0, defs=0x0, defcount=0, kwdefs=0x0, closure=0x0) at Python/ceval.c:3588
#36 0x0000000800cc284c in function_call (func=0x800714788, arg=0x8007a6058, kw=0x0) at Objects/funcobject.c:632
#37 0x0000000800c6e6ca in PyObject_Call (func=0x800714788, arg=0x8007a6058, kw=0x0) at Objects/abstract.c:2058
#38 0x0000000800c6fc5e in _PyObject_CallMethodIdObjArgs (callable=0x800714788, name=0x8011f6ad8 <PyImport_ImportModuleLevelObject.PyId__find_and_load>) at Objects/abstract.c:2328
#39 0x0000000800e638d1 in PyImport_ImportModuleLevelObject (name=0x800a7b890, given_globals=0x800735f38, locals=0x800735f38, given_fromlist=0x8011d1ae0 <_Py_NoneStruct>, level=0) at Python/import.c:1641
#40 0x0000000800e0cb57 in builtin___import__ (self=0x800692358, args=0x8006b88d8, kwds=0x0) at Python/bltinmodule.c:210
#41 0x0000000800cfa923 in PyCFunction_Call (func=0x8006942f8, arg=0x8006b88d8, kw=0x0) at Objects/methodobject.c:99
#42 0x0000000800c6e6ca in PyObject_Call (func=0x8006942f8, arg=0x8006b88d8, kw=0x0) at Objects/abstract.c:2058
#43 0x0000000800e30133 in PyEval_CallObjectWithKeywords (func=0x8006942f8, arg=0x8006b88d8, kw=0x0) at Python/ceval.c:4114
#44 0x0000000800e26bf5 in PyEval_EvalFrameEx (f=0x8024b1338, throwflag=0) at Python/ceval.c:2478
#45 0x0000000800e1778d in PyEval_EvalCodeEx (_co=0x800792b80, globals=0x800735f38, locals=0x800735f38, args=0x0, argcount=0, kws=0x0, kwcount=0, defs=0x0, defcount=0, kwdefs=0x0, closure=0x0) at Python/ceval.c:3588
#46 0x0000000800e16415 in PyEval_EvalCode (co=0x800792b80, globals=0x800735f38, locals=0x800735f38) at Python/ceval.c:775
#47 0x0000000800e7e62f in run_mod (mod=0x80259a0a8, filename=0x800a6c588, globals=0x800735f38, locals=0x800735f38, flags=0x7fffffffe918, arena=0x8025001b0) at Python/pythonrun.c:2175
#48 0x0000000800e7f060 in PyRun_FileExFlags (fp=0x801c20170, filename_str=0x80075d598 "cx.py", start=257, globals=0x800735f38, locals=0x800735f38, closeit=1, flags=0x7fffffffe918) at Python/pythonrun.c:2128
#49 0x0000000800e7da6f in PyRun_SimpleFileExFlags (fp=0x801c20170, filename=0x80075d598 "cx.py", closeit=1, flags=0x7fffffffe918) at Python/pythonrun.c:1601
#50 0x0000000800e7d1d4 in PyRun_AnyFileExFlags (fp=0x801c20170, filename=0x80075d598 "cx.py", closeit=1, flags=0x7fffffffe918) at Python/pythonrun.c:1287
#51 0x0000000800eb4e46 in run_file (fp=0x801c20170, filename=0x802416110 L"cx.py", p_cf=0x7fffffffe918) at Modules/main.c:319
#52 0x0000000800eb3a77 in Py_Main (argc=2, argv=0x802416090) at Modules/main.c:751
#53 0x0000000000400cbe in main (argc=2, argv=0x7fffffffea48) at ./Modules/python.c:69
(gdb)