[jira] [Comment Edited] (ARROW-16340) [C++][Python] Move all Python related code into PyArrow

[Yue Ni (Jira)]

    [ 
https://issues.apache.org/jira/browse/ARROW-16340?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17631416#comment-17631416
 ] 

Yue Ni edited comment on ARROW-16340 at 11/10/22 3:09 AM:
----------------------------------------------------------

[~kou] I follow your instruction (with some slight modification) to make it 
compiled and running but ran into some segfault during importing`pyarrow` 
module.


*1) Since I create a python binding, I use this python binding in my Python 
code.* `py::scoped_interpreter guard{}` seems not necessary because that will 
embed another interpreter, otherwise, pybind will report `the interpreter is 
already running` error. This is the only thing I revised.
*2) In my python code:*
```
import my_python_binding
import pyarrow # this lines triggers segfault
```
Some error like below is reported:
```
......
free(): invalid pointer
Fatal Python error: Aborted
Current thread 0x00007fae68f939c0 (most recent call first):
  File "<frozen importlib._bootstrap>", line 241 in _call_with_frames_removed
  File "<frozen importlib._bootstrap_external>", line 1176 in create_module
  File "<frozen importlib._bootstrap>", line 571 in module_from_spec
  File "<frozen importlib._bootstrap>", line 674 in _load_unlocked
  File "<frozen importlib._bootstrap>", line 1006 in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 1027 in _find_and_load
  File 
"/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/_{_}init{_}_.py",
 line 65 in <module>
  File "<frozen importlib._bootstrap>", line 241 in _call_with_frames_removed
  File "<frozen importlib._bootstrap_external>", line 883 in exec_module
  File "<frozen importlib._bootstrap>", line 688 in _load_unlocked
  File "<frozen importlib._bootstrap>", line 1006 in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 1027 in _find_and_load
  File "/usr/src/stonewave/bindings/python/<redated>/<redated>/search.py", line 
16 in search
```
The line 65 of `pyarrow/_{_}init{_}_.py` is `import pyarrow.lib as _lib`


{*}3) a core dump was generated{*}, and I use gdb to briefly view the core 
dump, it looks like this:
```
#0  raise (sig=<optimized out>) at ../sysdeps/unix/sysv/linux/raise.c:50
        set = \{__val = {0 <repeats 16 times>}}
        pid = <optimized out>
        tid = <optimized out>
        ret = <optimized out>
#1  <signal handler called>
No locals.
#2  0x00007fefa03eb735 in _{_}gnu_cxx::{_}{_}exchange_and_add ({_}_mem=0xa, 
__val=-1) at 
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/ext/atomicity.h:50
No locals.
#3  _{_}gnu_cxx::{_}{_}exchange_and_add_dispatch ({_}_mem=0xa, __val=-1) at 
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/ext/atomicity.h:84
No locals.
#4  std::{_}Sp_counted_base<({_}_gnu_cxx::_Lock_policy)2>::_M_release 
(this=0x2) at 
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr_base.h:155
No locals.
#5  0x00007fefa03eb6da in 
std::_{_}shared_count<({_}{_}gnu_cxx::_Lock_policy)2>::~{_}_shared_count 
(this=0x1bca350) at 
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr_base.h:733
No locals.
#6  0x00007fefa0463c5e in std::_{_}shared_ptr<arrow::StatusDetail, 
({_}{_}gnu_cxx::_Lock_policy)2>::~{_}_shared_ptr (this=0x1bca348)
    at 
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr_base.h:1183
No locals.
#7  0x00007fefa0463c38 in std::shared_ptr<arrow::StatusDetail>::~shared_ptr 
(this=0x1bca348) at 
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr.h:121
No locals.
#8  0x00007fefa0463c06 in arrow::Status::State::~State (this=0x1bca320) at 
/vcpkg/installed/x64-linux-haswell/include/arrow/status.h:347
No locals.
#9  0x00007fefa0463b9e in arrow::Status::DeleteState (this=0x7ffdcda1dd20) at 
/vcpkg/installed/x64-linux-haswell/include/arrow/status.h:357
No locals.
#10 0x00007fef93345f0c in arrow::internal::GetEnvVar(char const*) () from 
/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/libarrow.so.1000
No symbol table info available.
#11 0x00007fef93398924 in arrow::io::internal::GetIOThreadPool() () from 
/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/libarrow.so.1000
No symbol table info available.
#12 0x00007fef928ca51e in {_}GLOBAL{_}_sub_I_unity_6_cxx.cxx () from 
/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/libarrow.so.1000
No symbol table info available.
#13 0x00007fefae7fcfe2 in call_init (l=<optimized out>, argc=argc@entry=3, 
argv=argv@entry=0x7ffdcda20dc8, env=env@entry=0x7ffdcda20de8) at dl-init.c:72
        j = 0
        jm = <optimized out>
        addrs = <optimized out>
        init_array = <optimized out>
#14 0x00007fefae7fd0e9 in call_init (env=0x7ffdcda20de8, argv=0x7ffdcda20dc8, 
argc=3, l=<optimized out>) at dl-init.c:30
        init_array = <optimized out>
        j = <optimized out>
        jm = <optimized out>
        addrs = <optimized out>
#15 _dl_init (main_map=0x1baa930, argc=3, argv=0x7ffdcda20dc8, 
env=0x7ffdcda20de8) at dl-init.c:119
        preinit_array = <optimized out>
        preinit_array_size = <optimized out>
        i = <optimized out>
#16 0x00007fef9a56faed in _{_}GI{_}_dl_catch_exception 
(exception=exception@entry=0x0, operate=operate@entry=0x7fefae8005d0 
<call_dl_init>, args=args@entry=0x7ffdcda1dfd0) at dl-error-skeleton.c:182
        old = <optimized out>
        errcode = 0
-{-}Type <RET> for more, q to quit, c to continue without paging{-}-
        c = {exception = 0x7ffdcda1df30, errcode = 0x0, env = {{__jmpbuf =

{140728053391152, 0, 0, 140666978835288, 29011096, 140666978907692, 
140666978805312, 140666981352408}

, __mask_was_saved = -1790078976,
              _{_}saved_mask = {{_}_val =

{0, 140728053391248, 140667076916640, 0, 0, 0, 0, 0, 0, 0, 0, 
12468370135039750697, 140728053391728, 140728053391216, 140728053391728, 
140728053391392}

}}}}
        old = <optimized out>
#17 0x00007fefae801058 in dl_open_worker (a=a@entry=0x7ffdcda1e170) at 
dl-open.c:758
        init_args = \{new = 0x1baa930, argc = 3, argv = 0x7ffdcda20dc8, env = 
0x7ffdcda20de8}
        args = 0x7ffdcda1e170
        file = <optimized out>
        mode = <optimized out>
        call_map = <optimized out>
        dst = <optimized out>
        new = 0x1baa930
        _{_}PRETTY_FUNCTION{_}_ = "dl_open_worker"
        r = <optimized out>
        reloc_mode = <optimized out>
        nmaps = <optimized out>
        l = <optimized out>
        maps = <error reading variable maps (value requires 34359738360 bytes, 
which is more than max-value-size)>
        relocation_in_progress = <optimized out>
        any_tls = <optimized out>
#18 0x00007fef9a56fa90 in _{_}GI{_}_dl_catch_exception 
(exception=exception@entry=0x7ffdcda1e150, operate=operate@entry=0x7fefae800ca0 
<dl_open_worker>, args=args@entry=0x7ffdcda1e170) at dl-error-skeleton.c:208
        errcode = 0
        c = {exception = 0x7ffdcda1e150, errcode = 0x7ffdcda1e05c, env = 
{{__jmpbuf =

{2147483650, -855320820084358115, -74376, 3, 5369100, -2, -863008342291758051, 
-855308368215391203}

, __mask_was_saved = 0,
              _{_}saved_mask = {{_}_val =

{140667001712800, 140667001712800, 4506233, 140667001207448, 15, 
140667001207392, 140667001712848, 140728053391680, 140728053391712, 
140728053392737, 660865357547929600,                   140728053392480, 0, 257, 
140728053391712, 6671076}

}}}}
        old = 0x7ffdcda1e240
#19 0x00007fefae8008fa in _dl_open (file=0x7fef95808100 
"/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/lib.cpython-310-x86_64-linux-gnu.so",
 mode=-2147483646,
    caller_dlopen=0x51ed0c <_PyImport_FindSharedFuncptr+284>, nsid=-2, argc=3, 
argv=0x7ffdcda1e150, env=0x7ffdcda20de8) at dl-open.c:837
        args =

{file = 0x7fef95808100 
"/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/lib.cpython-310-x86_64-linux-gnu.so",
 mode = -2147483646,           caller_dlopen = 0x51ed0c 
<_PyImport_FindSharedFuncptr+284>, map = 0x1baa930, nsid = 0, 
original_global_scope_pending_adds = 0, argc = 3, argv = 0x7ffdcda20dc8, env = 
0x7ffdcda20de8}

        exception =

{objname = 0x439830 <list_richcompare> "UAWAVAUATSPH\213G\b\366\200\253", 
errstring = 0x7ffdcda1e250 "8Y\217\001",           message_buffer = 0xfbad8001 
<error: Cannot access memory at address 0xfbad8001>}

        errcode = <optimized out>
        _{_}PRETTY_FUNCTION{_}_ = "_dl_open"
#20 0x00007fef9a75a258 in dlopen_doit (a=a@entry=0x7ffdcda1e390) at dlopen.c:66
        args = 0x7ffdcda1e390
#21 0x00007fef9a56fa90 in _{_}GI{_}_dl_catch_exception 
(exception=exception@entry=0x7ffdcda1e330, operate=operate@entry=0x7fef9a75a200 
<dlopen_doit>, args=args@entry=0x7ffdcda1e390) at dl-error-skeleton.c:208
        errcode = 32751
        c = {exception = 0x7ffdcda1e330, errcode = 0x7ffdcda1e23c, env = 
{{__jmpbuf =

{26171704, 864236073942795293, -74376, 140666982652160, 140666983577264, 
140666982138112, -863008342354672611,                 -855308368215391203}

, _{_}mask_was_saved = 0, __saved_mask = {{_}_val =

{660865357547929600, 9223372036854775807, 258, 0, 0, 140666982652160, 
140728053392480, 140666982138112, 5216203, 206158430248,                   
140728053392336, 140728053392128, 140667001246696, 140667001246696, 2, 
140667001308992}

}}}}
        old = 0x0
#22 0x00007fef9a56fb4f in _{_}GI{_}_dl_catch_error 
(objname=objname@entry=0x18f5940, errstring=errstring@entry=0x18f5948, 
mallocedp=mallocedp@entry=0x18f5938, operate=operate@entry=0x7fef9a75a200 
<dlopen_doit>,
    args=args@entry=0x7ffdcda1e390) at dl-error-skeleton.c:227
        exception = \{objname = 0x0, errstring = 0x2 <error: Cannot access 
memory at address 0x2>, message_buffer = 0x1 <error: Cannot access memory at 
address 0x1>}
        errorcode = <optimized out>
#23 0x00007fef9a75aa65 in _dlerror_run (operate=operate@entry=0x7fef9a75a200 
<dlopen_doit>, args=args@entry=0x7ffdcda1e390) at dlerror.c:170
        result = 0x18f5930
-{-}Type <RET> for more, q to quit, c to continue without paging{-}-
#24 0x00007fef9a75a2e4 in __dlopen (file=<optimized out>, mode=<optimized out>) 
at dlopen.c:87
        args =

{file = 0x7fef95808100 
"/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/lib.cpython-310-x86_64-linux-gnu.so",
 mode = 2, new = 0x1a4acd0,           caller = 0x51ed0c 
<_PyImport_FindSharedFuncptr+284>}

#25 0x000000000051ed0c in _PyImport_FindSharedFuncptr (prefix=0x64fb3d 
"PyInit", shortname=0x7fef959676b0 "lib",
    pathname=0x7fef95808100 
"/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/lib.cpython-310-x86_64-linux-gnu.so",
 fp=0x0) at ./Python/dynload_shlib.c:100
        funcname = "PyInit_lib", '\000' <repeats 22 times>, 
"\340\371\234\225\357\177\000\000\000\000\000\000\000\000\000\000\001\000\000\000\000\000\000\000\001\000\000\000\000\000\000\000\001\000\000\000\001",
 '\000' <repeats 43 times>, 
"O\373d\000\000\000\000\000\320\254\244\001\000\000\000\000\060=\204\225\357\177\000\000P\345\241\315\375\177\000\000\002\000\000\000\000\000\000\000P\345\241\315\375\177\000\000\000\000\000\000\000\000\000\000V\357Y\000\000\000\000\000\240\356Y\000\000\000\000\000\220v\226\225\357\177\000\000\070\004\212\225\357\177\000\000"...
        pathbuf = 
"\002\000\000\000\000\000\000\000\350\357`\331\210,eY\000\321\254\226\357\177\000\000\236\272D\000\000\000\000\000\230z\243\226\357\177\000\000\000\000\000\000\000\000\000\000p\307\177\225\357\177\000\000\000Y\210\225\357\177\000\000\260A\212\225\357\177\000\000\220v\226\225\357\177\000\000\000\000\000\000\000\000\000\000\023\305P\000\000\000\000\000\020\000\000\000\060\000\000\000\260\346\241\315\375\177\000\000\360\345\241\315\375\177\000\000\000Y\210\225\357\177\000\000\000\000\000\000\000\000\000\000Q\274D\000\000\000\000\000p\307\177\225\357\177\000\000\260A\212\225\357\177\000\000\340\251p\000\000\000\000\000\340\251p\000\000\000\000\000\360\071j\000\000\000\000\000\003",
 '\000' <repeats 15 times>...
        dlopenflags = 29139752
        handle = <optimized out>
        p = <optimized out>
#26 0x00000000004eaa4e in _PyImport_LoadDynamicModuleWithSpec 
(spec=0x7fef95885900, fp=0x0) at ./Python/importdl.c:137
        m = 0x0
        path = <optimized out>
        name = 0x7fef95967690
        name_unicode = 0x7fef957fc770
        pathbytes = 0x7fef958080e0
        hook_prefix = 0x64fb3d "PyInit"
        name_buf = 0x7fef959676b0 "lib"
        exportfunc = <optimized out>
        p0 = <optimized out>
        oldcontext = <optimized out>
        def = <optimized out>
        modules = <optimized out>
#27 0x00000000004ea40e in _imp_create_dynamic_impl (module=<optimized out>, 
spec=0x7fef95885900, file=<optimized out>) at Python/import.c:2049
        name = 0x7fef957fc770
        path = 0x7fef958a41b0
        tstate = <optimized out>
        mod = 0x0
        fp = 0x0
#28 _imp_create_dynamic (module=<optimized out>, args=<optimized out>, 
nargs=<optimized out>) at Python/clinic/import.c.h:330
        file = <optimized out>
        return_value = 0x0
        spec = 0x7fef95885900
#29 0x000000000059ef56 in cfunction_vectorcall_FASTCALL (func=0x7fef96ac58a0, 
args=0x7fef95885168, nargsf=<optimized out>, kwnames=<optimized out>) at 
Objects/methodobject.c:430
        tstate = 0x1a4acd0
        nargs = 1
        meth = 0xa
        result = <optimized out>
#30 0x00000000004c1fe7 in do_call_core (tstate=0x1a4acd0, 
trace_info=0x7ffdcda1e7c0, func=0x7fef96ac58a0, callargs=0x7fef95885150, 
kwdict=0x0) at Python/ceval.c:5915
        result = <optimized out>
        nargs = <optimized out>
        self = <optimized out>
-{-}Type <RET> for more, q to quit, c to continue without paging{-}-
#31 _PyEval_EvalFrameDefault (tstate=<optimized out>, f=0x7fef96a5f490, 
throwflag=<optimized out>) at Python/ceval.c:4277
        func = 0x7fef96ac58a0
        kwargs = <optimized out>
        callargs = 0x7fef95885150
        result = <optimized out>
        opcode_targets =

{0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4bbe90 
<_PyEval_EvalFrameDefault+2064>, 0x4bbeda <_PyEval_EvalFrameDefault+2138>, 
0x4bbf20 <_PyEval_EvalFrameDefault+2208>,           0x4bbfba 
<_PyEval_EvalFrameDefault+2362>, 0x4bc00f <_PyEval_EvalFrameDefault+2447>, 
0x4bbf69 <_PyEval_EvalFrameDefault+2281>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555>,           0x4c29f3 
<_PyEval_EvalFrameDefault+29555>, 0x4bbd3f <_PyEval_EvalFrameDefault+1727>, 
0x4bc070 <_PyEval_EvalFrameDefault+2544>, 0x4bc0e7 
<_PyEval_EvalFrameDefault+2663>,           0x4bc15e 
<_PyEval_EvalFrameDefault+2782>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4bc23f 
<_PyEval_EvalFrameDefault+3007>,           0x4bc3e8 
<_PyEval_EvalFrameDefault+3432>, 0x4bcda4 <_PyEval_EvalFrameDefault+5924>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4bc2b6 
<_PyEval_EvalFrameDefault+3126>,           0x4bc353 
<_PyEval_EvalFrameDefault+3283>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 
0x4bc5a7 <_PyEval_EvalFrameDefault+3879>, 0x4bc6af 
<_PyEval_EvalFrameDefault+4143>,           0x4bc76f 
<_PyEval_EvalFrameDefault+4335>, 0x4bc804 <_PyEval_EvalFrameDefault+4484>, 
0x4bc512 <_PyEval_EvalFrameDefault+3730>, 0x4bc47d 
<_PyEval_EvalFrameDefault+3581>,           0x4bcece 
<_PyEval_EvalFrameDefault+6222>, 0x4bce39 <_PyEval_EvalFrameDefault+6073>, 
0x4c0bbe <_PyEval_EvalFrameDefault+21822>, 0x4c0ff9 
<_PyEval_EvalFrameDefault+22905>,           0x4c1067 
<_PyEval_EvalFrameDefault+23015>, 0x4c10d5 <_PyEval_EvalFrameDefault+23125>, 
0x4c142b <_PyEval_EvalFrameDefault+23979>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555> <repeats 14 times>,           0x4c19fa 
<_PyEval_EvalFrameDefault+25466>, 0x4bd6de <_PyEval_EvalFrameDefault+8286>, 
0x4bd78d <_PyEval_EvalFrameDefault+8461>, 0x4c175b 
<_PyEval_EvalFrameDefault+24795>,           0x4c29f3 
<_PyEval_EvalFrameDefault+29555>, 0x4bdc9f <_PyEval_EvalFrameDefault+9759>, 
0x4bd01c <_PyEval_EvalFrameDefault+6556>, 0x4bd0dc 
<_PyEval_EvalFrameDefault+6748>,           0x4bcd0f 
<_PyEval_EvalFrameDefault+5775>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 
0x4bcf63 <_PyEval_EvalFrameDefault+6371>, 0x4bd45a 
<_PyEval_EvalFrameDefault+7642>,           0x4bd51b 
<_PyEval_EvalFrameDefault+7835>, 0x4bc899 <_PyEval_EvalFrameDefault+4633>, 
0x4bc92e <_PyEval_EvalFrameDefault+4782>, 0x4bc9c3 
<_PyEval_EvalFrameDefault+4931>,           0x4bca58 
<_PyEval_EvalFrameDefault+5080>, 0x4bcaed <_PyEval_EvalFrameDefault+5229>, 
0x4bcc72 <_PyEval_EvalFrameDefault+5618>, 0x4c14e1 
<_PyEval_EvalFrameDefault+24161>,           0x4c1558 
<_PyEval_EvalFrameDefault+24280>, 0x4bd5cb <_PyEval_EvalFrameDefault+8011>, 
0x4bde54 <_PyEval_EvalFrameDefault+10196>, 0x4bd962 
<_PyEval_EvalFrameDefault+8930>,           0x4bd855 
<_PyEval_EvalFrameDefault+8661>, 0x4bddfc <_PyEval_EvalFrameDefault+10108>, 
0x4bd171 <_PyEval_EvalFrameDefault+6897>, 0x4bd206 
<_PyEval_EvalFrameDefault+7046>,           0x4bd29b 
<_PyEval_EvalFrameDefault+7195>, 0x4bd330 <_PyEval_EvalFrameDefault+7344>, 
0x4bd3c5 <_PyEval_EvalFrameDefault+7493>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555>,           0x4c29f3 
<_PyEval_EvalFrameDefault+29555>, 0x4bed46 <_PyEval_EvalFrameDefault+14022>, 
0x4c2ef5 <_PyEval_EvalFrameDefault+30837>, 0x4c008f 
<_PyEval_EvalFrameDefault+18959>,           0x4bf0e3 
<_PyEval_EvalFrameDefault+14947>, 0x4c2f5b <_PyEval_EvalFrameDefault+30939>, 
0x4bdc60 <_PyEval_EvalFrameDefault+9696>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555>,           0x4bdb97 
<_PyEval_EvalFrameDefault+9495>, 0x4bdee7 <_PyEval_EvalFrameDefault+10343>, 
0x4bdf9a <_PyEval_EvalFrameDefault+10522>, 0x4bdffe 
<_PyEval_EvalFrameDefault+10622>,           0x4c1604 
<_PyEval_EvalFrameDefault+24452>, 0x4be190 <_PyEval_EvalFrameDefault+11024>, 
0x4be223 <_PyEval_EvalFrameDefault+11171>, 0x4be2c3 
<_PyEval_EvalFrameDefault+11331>,           0x4be342 
<_PyEval_EvalFrameDefault+11458>, 0x4be3c3 <_PyEval_EvalFrameDefault+11587>, 
0x4c26d1 <_PyEval_EvalFrameDefault+28753>, 0x4bbdcd 
<_PyEval_EvalFrameDefault+1869>,           0x4be465 
<_PyEval_EvalFrameDefault+11749>, 0x4bea95 <_PyEval_EvalFrameDefault+13333>, 
0x4bec25 <_PyEval_EvalFrameDefault+13733>, 0x4beec7 
<_PyEval_EvalFrameDefault+14407>,           0x4befda 
<_PyEval_EvalFrameDefault+14682>, 0x4bf953 <_PyEval_EvalFrameDefault+17107>, 
0x4bfb3b <_PyEval_EvalFrameDefault+17595>, 0x4bfec6 
<_PyEval_EvalFrameDefault+18502>,           0x4c047d 
<_PyEval_EvalFrameDefault+19965>, 0x4c05a9 <_PyEval_EvalFrameDefault+20265>, 
0x4c08f0 <_PyEval_EvalFrameDefault+21104>, 0x4c0a2a 
<_PyEval_EvalFrameDefault+21418>,           0x4c0b66 
<_PyEval_EvalFrameDefault+21734>, 0x4c05e7 <_PyEval_EvalFrameDefault+20327>, 
0x4c0764 <_PyEval_EvalFrameDefault+20708>, 0x4be53b 
<_PyEval_EvalFrameDefault+11963>,           0x4bfbd3 
<_PyEval_EvalFrameDefault+17747>, 0x4bfc69 <_PyEval_EvalFrameDefault+17897>, 
0x4c2f1b <_PyEval_EvalFrameDefault+30875>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555>,           0x4bfd26 
<_PyEval_EvalFrameDefault+18086>, 0x4c1706 <_PyEval_EvalFrameDefault+24710>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4bbd76 
<_PyEval_EvalFrameDefault+1782>,           0x4bbe2e 
<_PyEval_EvalFrameDefault+1966>, 0x4be715 <_PyEval_EvalFrameDefault+12437>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555>,           0x4bdb4d 
<_PyEval_EvalFrameDefault+9421>, 0x4c2ec8 <_PyEval_EvalFrameDefault+30792>, 
0x4c1c7d <_PyEval_EvalFrameDefault+26109>, 0x4bbc00 
<_PyEval_EvalFrameDefault+1408>,           0x4c2502 
<_PyEval_EvalFrameDefault+28290>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 
0x4be7dd <_PyEval_EvalFrameDefault+12637>, 0x4be912 
<_PyEval_EvalFrameDefault+12946>,           0x4be971 
<_PyEval_EvalFrameDefault+13041>, 0x4be777 <_PyEval_EvalFrameDefault+12535>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555>,           0x4c1d13 
<_PyEval_EvalFrameDefault+26259>, 0x4c1dcf <_PyEval_EvalFrameDefault+26447>, 
0x4c18cc <_PyEval_EvalFrameDefault+25164>, 0x4c2750 
<_PyEval_EvalFrameDefault+28880>,           0x4bcb82 
<_PyEval_EvalFrameDefault+5378>, 0x4bcbfa <_PyEval_EvalFrameDefault+5498>, 
0x4bf45b <_PyEval_EvalFrameDefault+15835>, 0x4be83d 
<_PyEval_EvalFrameDefault+12733>,           0x4c29f3 
<_PyEval_EvalFrameDefault+29555>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4c0c25 
<_PyEval_EvalFrameDefault+21925>,           0x4c29f3 
<_PyEval_EvalFrameDefault+29555>, 0x4c1860 <_PyEval_EvalFrameDefault+25056>, 
0x4c25d0 <_PyEval_EvalFrameDefault+28496>, 0x4bf239 
<_PyEval_EvalFrameDefault+15289>,           0x4be9d7 
<_PyEval_EvalFrameDefault+13143>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4c1af3 
<_PyEval_EvalFrameDefault+25715>,           0x4c1b9f 
<_PyEval_EvalFrameDefault+25887>, 0x4bedb8 <_PyEval_EvalFrameDefault+14136>, 
0x4bee4f <_PyEval_EvalFrameDefault+14287>, 0x4bf3e1 
<_PyEval_EvalFrameDefault+15713>,           0x4bf36e 
<_PyEval_EvalFrameDefault+15598>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555> 
<repeats 90 times>}

        PyId_displayhook = \{string = 0x64aae2 "displayhook", index = -1}
        PyId_send = \{string = 0x6a362a "send", index = -1}
        PyId__{_}build_class{_}_ = {string = 0x64ac69 "_{_}build_class{_}_", 
index = 18}
-{-}Type <RET> for more, q to quit, c to continue without paging{-}-
        PyId__{_}annotations{_}_ = {string = 0x655175 "_{_}annotations{_}_", 
index = -1}
        PyId__{_}aenter{_}_ = {string = 0x64ae53 "_{_}aenter{_}_", index = -1}
        PyId__{_}aexit{_}_ = {string = 0x64ae5e "_{_}aexit{_}_", index = -1}
        PyId__{_}enter{_}_ = {string = 0x606990 "_{_}enter{_}_", index = 40}
        PyId__{_}exit{_}_ = {string = 0x60699a "_{_}exit{_}_", index = 41}
        trace_info = {code = 0x0, bounds = {ar_start = 15, ar_end = 0, ar_line 
= -1767671200, opaque = {computed_line = -1767152416, lo_next = 0x7ffdcda1e830 
"\220\364\245\226\357\177",
              limit = 0x5989e3 <frame_dealloc+163> 
"\353\333A\213D$P\205\300~>1\333\353\032f.\017\037\204"}}, cframe = 
\{use_tracing = 0, previous = 0x7ffdcda1ea40}}
        _unknown_opcode = <optimized out>
#32 0x00000000004bb57d in _PyEval_EvalFrame (tstate=0x1a4acd0, 
f=0x7fef96a5f490, throwflag=0) at ./Include/internal/pycore_ceval.h:46
No locals.
#33 _PyEval_Vector (tstate=0x1a4acd0, con=0x7fef96a79520, locals=<optimized 
out>, args=<optimized out>, argcount=<optimized out>, kwnames=<optimized out>) 
at Python/ceval.c:5065
        f = 0x7fef96a5f490
        retval = <optimized out>
#34 0x00000000004c4823 in call_function (tstate=<optimized out>, 
tstate@entry=0x1a4acd0, trace_info=trace_info@entry=0x7ffdcda1ea10, 
pp_stack=pp_stack@entry=0x7ffdcda1eac8, oparg=<optimized out>,
    oparg@entry=27569360, kwnames=0xffffffff, kwnames@entry=0x0) at 
./Include/cpython/abstract.h:115
        pfunc = 0x7fef96ad5140
        func = 0x7fef96a79510
        nkwargs = <optimized out>
        nargs = <optimized out>
        stack = 0x7fef96ad5148
        x = <optimized out>
        w = <optimized out>
#35 0x00000000004c1c0b in _PyEval_EvalFrameDefault (tstate=<optimized out>, 
f=0x7fef96ad4fc0, throwflag=<optimized out>) at Python/ceval.c:4181
        sp = 0x7fef96ad5158
        meth = <optimized out>
        res = <optimized out>
        opcode_targets =

{0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4bbe90 
<_PyEval_EvalFrameDefault+2064>, 0x4bbeda <_PyEval_EvalFrameDefault+2138>, 
0x4bbf20 <_PyEval_EvalFrameDefault+2208>,           0x4bbfba 
<_PyEval_EvalFrameDefault+2362>, 0x4bc00f <_PyEval_EvalFrameDefault+2447>, 
0x4bbf69 <_PyEval_EvalFrameDefault+2281>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555>,           0x4c29f3 
<_PyEval_EvalFrameDefault+29555>, 0x4bbd3f <_PyEval_EvalFrameDefault+1727>, 
0x4bc070 <_PyEval_EvalFrameDefault+2544>, 0x4bc0e7 
<_PyEval_EvalFrameDefault+2663>,           0x4bc15e 
<_PyEval_EvalFrameDefault+2782>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4bc23f 
<_PyEval_EvalFrameDefault+3007>,           0x4bc3e8 
<_PyEval_EvalFrameDefault+3432>, 0x4bcda4 <_PyEval_EvalFrameDefault+5924>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4bc2b6 
<_PyEval_EvalFrameDefault+3126>,           0x4bc353 
<_PyEval_EvalFrameDefault+3283>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 
0x4bc5a7 <_PyEval_EvalFrameDefault+3879>, 0x4bc6af 
<_PyEval_EvalFrameDefault+4143>,           0x4bc76f 
<_PyEval_EvalFrameDefault+4335>, 0x4bc804 <_PyEval_EvalFrameDefault+4484>, 
0x4bc512 <_PyEval_EvalFrameDefault+3730>, 0x4bc47d 
<_PyEval_EvalFrameDefault+3581>,           0x4bcece 
<_PyEval_EvalFrameDefault+6222>, 0x4bce39 <_PyEval_EvalFrameDefault+6073>, 
0x4c0bbe <_PyEval_EvalFrameDefault+21822>, 0x4c0ff9 
<_PyEval_EvalFrameDefault+22905>,           0x4c1067 
<_PyEval_EvalFrameDefault+23015>, 0x4c10d5 <_PyEval_EvalFrameDefault+23125>, 
0x4c142b <_PyEval_EvalFrameDefault+23979>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555> <repeats 14 times>,           0x4c19fa 
<_PyEval_EvalFrameDefault+25466>, 0x4bd6de <_PyEval_EvalFrameDefault+8286>, 
0x4bd78d <_PyEval_EvalFrameDefault+8461>, 0x4c175b 
<_PyEval_EvalFrameDefault+24795>,           0x4c29f3 
<_PyEval_EvalFrameDefault+29555>, 0x4bdc9f <_PyEval_EvalFrameDefault+9759>, 
0x4bd01c <_PyEval_EvalFrameDefault+6556>, 0x4bd0dc 
<_PyEval_EvalFrameDefault+6748>,           0x4bcd0f 
<_PyEval_EvalFrameDefault+5775>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 
0x4bcf63 <_PyEval_EvalFrameDefault+6371>, 0x4bd45a 
<_PyEval_EvalFrameDefault+7642>,           0x4bd51b 
<_PyEval_EvalFrameDefault+7835>, 0x4bc899 <_PyEval_EvalFrameDefault+4633>, 
0x4bc92e <_PyEval_EvalFrameDefault+4782>, 0x4bc9c3 
<_PyEval_EvalFrameDefault+4931>,           0x4bca58 
<_PyEval_EvalFrameDefault+5080>, 0x4bcaed <_PyEval_EvalFrameDefault+5229>, 
0x4bcc72 <_PyEval_EvalFrameDefault+5618>, 0x4c14e1 
<_PyEval_EvalFrameDefault+24161>,           0x4c1558 
<_PyEval_EvalFrameDefault+24280>, 0x4bd5cb <_PyEval_EvalFrameDefault+8011>, 
0x4bde54 <_PyEval_EvalFrameDefault+10196>, 0x4bd962 
<_PyEval_EvalFrameDefault+8930>,           0x4bd855 
<_PyEval_EvalFrameDefault+8661>, 0x4bddfc <_PyEval_EvalFrameDefault+10108>, 
0x4bd171 <_PyEval_EvalFrameDefault+6897>, 0x4bd206 
<_PyEval_EvalFrameDefault+7046>,           0x4bd29b 
<_PyEval_EvalFrameDefault+7195>, 0x4bd330 <_PyEval_EvalFrameDefault+7344>, 
0x4bd3c5 <_PyEval_EvalFrameDefault+7493>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555>,           0x4c29f3 
<_PyEval_EvalFrameDefault+29555>, 0x4bed46 <_PyEval_EvalFrameDefault+14022>, 
0x4c2ef5 <_PyEval_EvalFrameDefault+30837>, 0x4c008f 
<_PyEval_EvalFrameDefault+18959>,           0x4bf0e3 
<_PyEval_EvalFrameDefault+14947>, 0x4c2f5b <_PyEval_EvalFrameDefault+30939>, 
0x4bdc60 <_PyEval_EvalFrameDefault+9696>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555>,           0x4bdb97 
<_PyEval_EvalFrameDefault+9495>, 0x4bdee7 <_PyEval_EvalFrameDefault+10343>, 
0x4bdf9a <_PyEval_EvalFrameDefault+10522>, 0x4bdffe 
<_PyEval_EvalFrameDefault+10622>,           0x4c1604 
<_PyEval_EvalFrameDefault+24452>, 0x4be190 <_PyEval_EvalFrameDefault+11024>, 
0x4be223 <_PyEval_EvalFrameDefault+11171>, 0x4be2c3 
<_PyEval_EvalFrameDefault+11331>, --Type <RET> for more, q to quit, c to 
continue without paging--           0x4be342 <_PyEval_EvalFrameDefault+11458>, 
0x4be3c3 <_PyEval_EvalFrameDefault+11587>, 0x4c26d1 
<_PyEval_EvalFrameDefault+28753>, 0x4bbdcd <_PyEval_EvalFrameDefault+1869>,     
      0x4be465 <_PyEval_EvalFrameDefault+11749>, 0x4bea95 
<_PyEval_EvalFrameDefault+13333>, 0x4bec25 <_PyEval_EvalFrameDefault+13733>, 
0x4beec7 <_PyEval_EvalFrameDefault+14407>,           0x4befda 
<_PyEval_EvalFrameDefault+14682>, 0x4bf953 <_PyEval_EvalFrameDefault+17107>, 
0x4bfb3b <_PyEval_EvalFrameDefault+17595>, 0x4bfec6 
<_PyEval_EvalFrameDefault+18502>,           0x4c047d 
<_PyEval_EvalFrameDefault+19965>, 0x4c05a9 <_PyEval_EvalFrameDefault+20265>, 
0x4c08f0 <_PyEval_EvalFrameDefault+21104>, 0x4c0a2a 
<_PyEval_EvalFrameDefault+21418>,           0x4c0b66 
<_PyEval_EvalFrameDefault+21734>, 0x4c05e7 <_PyEval_EvalFrameDefault+20327>, 
0x4c0764 <_PyEval_EvalFrameDefault+20708>, 0x4be53b 
<_PyEval_EvalFrameDefault+11963>,           0x4bfbd3 
<_PyEval_EvalFrameDefault+17747>, 0x4bfc69 <_PyEval_EvalFrameDefault+17897>, 
0x4c2f1b <_PyEval_EvalFrameDefault+30875>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555>,           0x4bfd26 
<_PyEval_EvalFrameDefault+18086>, 0x4c1706 <_PyEval_EvalFrameDefault+24710>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4bbd76 
<_PyEval_EvalFrameDefault+1782>,           0x4bbe2e 
<_PyEval_EvalFrameDefault+1966>, 0x4be715 <_PyEval_EvalFrameDefault+12437>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555>,           0x4bdb4d 
<_PyEval_EvalFrameDefault+9421>, 0x4c2ec8 <_PyEval_EvalFrameDefault+30792>, 
0x4c1c7d <_PyEval_EvalFrameDefault+26109>, 0x4bbc00 
<_PyEval_EvalFrameDefault+1408>,           0x4c2502 
<_PyEval_EvalFrameDefault+28290>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 
0x4be7dd <_PyEval_EvalFrameDefault+12637>, 0x4be912 
<_PyEval_EvalFrameDefault+12946>,           0x4be971 
<_PyEval_EvalFrameDefault+13041>, 0x4be777 <_PyEval_EvalFrameDefault+12535>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555>,           0x4c1d13 
<_PyEval_EvalFrameDefault+26259>, 0x4c1dcf <_PyEval_EvalFrameDefault+26447>, 
0x4c18cc <_PyEval_EvalFrameDefault+25164>, 0x4c2750 
<_PyEval_EvalFrameDefault+28880>,           0x4bcb82 
<_PyEval_EvalFrameDefault+5378>, 0x4bcbfa <_PyEval_EvalFrameDefault+5498>, 
0x4bf45b <_PyEval_EvalFrameDefault+15835>, 0x4be83d 
<_PyEval_EvalFrameDefault+12733>,           0x4c29f3 
<_PyEval_EvalFrameDefault+29555>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4c0c25 
<_PyEval_EvalFrameDefault+21925>,           0x4c29f3 
<_PyEval_EvalFrameDefault+29555>, 0x4c1860 <_PyEval_EvalFrameDefault+25056>, 
0x4c25d0 <_PyEval_EvalFrameDefault+28496>, 0x4bf239 
<_PyEval_EvalFrameDefault+15289>,           0x4be9d7 
<_PyEval_EvalFrameDefault+13143>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4c1af3 
<_PyEval_EvalFrameDefault+25715>,           0x4c1b9f 
<_PyEval_EvalFrameDefault+25887>, 0x4bedb8 <_PyEval_EvalFrameDefault+14136>, 
0x4bee4f <_PyEval_EvalFrameDefault+14287>, 0x4bf3e1 
<_PyEval_EvalFrameDefault+15713>,           0x4bf36e 
<_PyEval_EvalFrameDefault+15598>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555> 
<repeats 90 times>}

        PyId_displayhook = \{string = 0x64aae2 "displayhook", index = -1}
        PyId_send = \{string = 0x6a362a "send", index = -1}
        PyId__{_}build_class{_}_ = {string = 0x64ac69 "_{_}build_class{_}_", 
index = 18}
        PyId__{_}annotations{_}_ = {string = 0x655175 "_{_}annotations{_}_", 
index = -1}
        PyId__{_}aenter{_}_ = {string = 0x64ae53 "_{_}aenter{_}_", index = -1}
        PyId__{_}aexit{_}_ = {string = 0x64ae5e "_{_}aexit{_}_", index = -1}
        PyId__{_}enter{_}_ = {string = 0x606990 "_{_}enter{_}_", index = 40}
        PyId__{_}exit{_}_ = {string = 0x60699a "_{_}exit{_}_", index = 41}
        trace_info = \{code = 0x0, bounds = {ar_start = 64, ar_end = 0, ar_line 
= -1786174976, opaque = {computed_line = 28322560, lo_next = 0x725a70 
<PyMethod_Type> "\026", limit = 0x7fef95884eb0 "\003"}},
          cframe = \{use_tracing = 0, previous = 0x7ffdcda1ec90}}
        _unknown_opcode = <optimized out>
#36 0x00000000004bb57d in _PyEval_EvalFrame (tstate=0x1a4acd0, 
f=0x7fef96ad4fc0, throwflag=0) at ./Include/internal/pycore_ceval.h:46
No locals.
#37 _PyEval_Vector (tstate=0x1a4acd0, con=0x7fef96afe600, locals=<optimized 
out>, args=<optimized out>, argcount=<optimized out>, kwnames=<optimized out>) 
at Python/ceval.c:5065
        f = 0x7fef96ad4fc0
        retval = <optimized out>
```
It seems both my python binding and pyarrow uses arrow's code to do some 
initialization, the `arrow::io::internal::GetIOThreadPool` for some reason 
fails to work in this case and caused the segfault.


{*}4) Since it is related with 
`::arrow::internal::GetEnvVar("ARROW_IO_THREADS");`{*}, I tried setting the 
`ARROW_IO_THREADS` env var to a number and gave it another try. And the program 
still caused a segfault, but reporting a different error (there is no `free(): 
invalid pointer` printed this time):
```
Fatal Python error: Segmentation fault
Current thread 0x00007fea55bd09c0 (most recent call first):
  File "<frozen importlib._bootstrap>", line 241 in _call_with_frames_removed
  File "<frozen importlib._bootstrap_external>", line 1176 in create_module
  File "<frozen importlib._bootstrap>", line 571 in module_from_spec
  File "<frozen importlib._bootstrap>", line 674 in _load_unlocked
  File "<frozen importlib._bootstrap>", line 1006 in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 1027 in _find_and_load
  File 
"/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/_{_}init{_}_.py",
 line 65 in <module>
  File "<frozen importlib._bootstrap>", line 241 in _call_with_frames_removed
  File "<frozen importlib._bootstrap_external>", line 883 in exec_module
  File "<frozen importlib._bootstrap>", line 688 in _load_unlocked
  File "<frozen importlib._bootstrap>", line 1006 in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 1027 in _find_and_load
  File "/usr/src/stonewave/bindings/python/<redated>/<redated>/search.py", line 
16 in search
```


{*}5) I used gdb to view the core dump again{*}, and it reported error like 
below:
```
#0  raise (sig=<optimized out>) at ../sysdeps/unix/sysv/linux/raise.c:50
        set = \{__val = {0 <repeats 16 times>}}
        pid = <optimized out>
        tid = <optimized out>
        ret = <optimized out>
#1  <signal handler called>
No locals.
#2  0x00007fea5d4a60bb in std::_{_}shared_ptr<arrow::DataType, 
({_}{_}gnu_cxx::_Lock_policy)2>::{_}_shared_ptr (this=0x5)
    at 
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr_base.h:1181
No locals.
#3  0x00007fea5d4a6093 in std::shared_ptr<arrow::DataType>::shared_ptr 
(this=0x5) at 
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr.h:149
No locals.
#4  0x00007fea5d9da822 in arrow::int32 () at 
/vcpkg/buildtrees/arrow/src/c4eb0a0543-8e1ffd6d16.clean/cpp/src/arrow/type.cc:2165
        result = warning: RTTI symbol not found for class 
'std::{_}Sp_counted_ptr_inplace<arrow::Int32Type, 
std::allocator<arrow::Int32Type>, ({_}_gnu_cxx::_Lock_policy)2>'
warning: RTTI symbol not found for class 
'std::{_}Sp_counted_ptr_inplace<arrow::Int32Type, 
std::allocator<arrow::Int32Type>, ({_}_gnu_cxx::_Lock_policy)2>'
std::shared_ptr<arrow::DataType> (use count 1053, weak count 0) = \{get() = 
0x108ba70}
#5  0x00007fea364ff4af in {_}GLOBAL{_}_sub_I_unity_1_cxx.cxx () from 
/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/libarrow_dataset.so.1000
No symbol table info available.
#6  0x00007fea6b82ffe2 in call_init (l=<optimized out>, argc=argc@entry=5, 
argv=argv@entry=0x7fff106aae38, env=env@entry=0x168fd50) at dl-init.c:72
        j = 0
        jm = <optimized out>
        addrs = <optimized out>
        init_array = <optimized out>
#7  0x00007fea6b8300e9 in call_init (env=0x168fd50, argv=0x7fff106aae38, 
argc=5, l=<optimized out>) at dl-init.c:30
        init_array = <optimized out>
        j = <optimized out>
        jm = <optimized out>
        addrs = <optimized out>
#8  _dl_init (main_map=0x1918190, argc=5, argv=0x7fff106aae38, env=0x168fd50) 
at dl-init.c:119
        preinit_array = <optimized out>
        preinit_array_size = <optimized out>
        i = <optimized out>
#9  0x00007fea575a2aed in _{_}GI{_}_dl_catch_exception 
(exception=exception@entry=0x0, operate=operate@entry=0x7fea6b8335d0 
<call_dl_init>, args=args@entry=0x7fff106a1cd0)
    at dl-error-skeleton.c:182
        old = <optimized out>
        errcode = 0
        c = {exception = 0x7fff106a1c30, errcode = 0x0, env = {{__jmpbuf =

{140733468777520, 0, 0, 140643321125720, 26313976, 140643321198124, 
140643321095744, 140643323642840}

,
              _{_}mask_was_saved = 322015232, __saved_mask = {{_}_val =

{0, 140733468777616, 140644478215584, 0, 0, 0, 0, 0, 0, 0, 0, 
12468370135039750697, 140733468778096, 140733468777584,                   
140733468778096, 140733468777760}

}}}}
        old = <optimized out>
#10 0x00007fea6b834058 in dl_open_worker (a=a@entry=0x7fff106a1e70) at 
dl-open.c:758
        init_args = \{new = 0x1918190, argc = 5, argv = 0x7fff106aae38, env = 
0x168fd50}
        args = 0x7fff106a1e70
        file = <optimized out>
        mode = <optimized out>
        call_map = <optimized out>
        dst = <optimized out>
        new = 0x1918190
        _{_}PRETTY_FUNCTION{_}_ = "dl_open_worker"
        r = <optimized out>
-{-}Type <RET> for more, q to quit, c to continue without paging{-}-
        reloc_mode = <optimized out>
        nmaps = <optimized out>
        l = <optimized out>
        maps = <error reading variable maps (value requires 138793856 bytes, 
which is more than max-value-size)>
        relocation_in_progress = <optimized out>
        any_tls = <optimized out>
#11 0x00007fea575a2a90 in _{_}GI{_}_dl_catch_exception 
(exception=exception@entry=0x7fff106a1e50, operate=operate@entry=0x7fea6b833ca0 
<dl_open_worker>, args=args@entry=0x7fff106a1e70)
    at dl-error-skeleton.c:208
        errcode = 0
        c = {exception = 0x7fff106a1e50, errcode = 0x7fff106a1d5c, env = 
{{__jmpbuf =

{2147483650, 1061564265845182786, -74376, 5, 5369100, -2, 1049880826869928258, 
1061551455913726274}

,
              _{_}mask_was_saved = 0, __saved_mask = {{_}_val =

{140644403015840, 140644403015840, 4506233, 140644402510488, 15, 
140644402510432, 140644403015888, 140733468778048,                   
140733468778080, 140733468779105, 10865718445837529600, 140733468778848, 0, 
257, 140733468778080, 6671076}

}}}}
        old = 0x7fff106a1f40
#12 0x00007fea6b8338fa in _dl_open (file=0x7fea5165efc0 
"/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/lib.cpython-310-x86_64-linux-gnu.so",
    mode=-2147483646, caller_dlopen=0x51ed0c <_PyImport_FindSharedFuncptr+284>, 
nsid=-2, argc=5, argv=0x7fff106a1e50, env=0x168fd50) at dl-open.c:837
        args =

{file = 0x7fea5165efc0 
"/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/lib.cpython-310-x86_64-linux-gnu.so",
           mode = -2147483646, caller_dlopen = 0x51ed0c 
<_PyImport_FindSharedFuncptr+284>, map = 0x1918190, nsid = 0, 
original_global_scope_pending_adds = 0, argc = 5,           argv = 
0x7fff106aae38, env = 0x168fd50}

        exception =

{objname = 0x439830 <list_richcompare> "UAWAVAUATSPH\213G\b\366\200\253", 
errstring = 0x7fff106a1f50 "8Y\b\001",           message_buffer = 0xfbad8001 
<error: Cannot access memory at address 0xfbad8001>}

        errcode = <optimized out>
        _{_}PRETTY_FUNCTION{_}_ = "_dl_open"
#13 0x00007fea5778d258 in dlopen_doit (a=a@entry=0x7fff106a2090) at dlopen.c:66
        args = 0x7fff106a2090
#14 0x00007fea575a2a90 in _{_}GI{_}_dl_catch_exception 
(exception=exception@entry=0x7fff106a2030, operate=operate@entry=0x7fea5778d200 
<dlopen_doit>, args=args@entry=0x7fff106a2090)
    at dl-error-skeleton.c:208
        errcode = 32746
        c = {exception = 0x7fff106a2030, errcode = 0x7fff106a1f3c, env = 
{{__jmpbuf =

{17324344, -1049391729601195710, -74376, 140644364656960, 140644364656832, 
140644364709824,                 1049880826807013698, 1061551455913726274}

, _{_}mask_was_saved = 0, __saved_mask = {{_}_val =

{10865718445837529600, 9223372036854775807, 258, 0, 0, 140644364656960,         
          140733468778848, 140644364709824, 5216203, 206158430248, 
140733468778704, 140733468778496, 140644402549736, 140644402549736, 2, 
140644402612032}

}}}}
        old = 0x0
#15 0x00007fea575a2b4f in _{_}GI{_}_dl_catch_error 
(objname=objname@entry=0x1085940, errstring=errstring@entry=0x1085948, 
mallocedp=mallocedp@entry=0x1085938,
    operate=operate@entry=0x7fea5778d200 <dlopen_doit>, 
args=args@entry=0x7fff106a2090) at dl-error-skeleton.c:227
        exception = \{objname = 0x0, errstring = 0x2 <error: Cannot access 
memory at address 0x2>, message_buffer = 0x1 <error: Cannot access memory at 
address 0x1>}
        errorcode = <optimized out>
#16 0x00007fea5778da65 in _dlerror_run (operate=operate@entry=0x7fea5778d200 
<dlopen_doit>, args=args@entry=0x7fff106a2090) at dlerror.c:170
        result = 0x1085930
#17 0x00007fea5778d2e4 in __dlopen (file=<optimized out>, mode=<optimized out>) 
at dlopen.c:87
        args =

{file = 0x7fea5165efc0 
"/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/lib.cpython-310-x86_64-linux-gnu.so",
 mode = 2,           new = 0x11f6700, caller = 0x51ed0c 
<_PyImport_FindSharedFuncptr+284>}

#18 0x000000000051ed0c in _PyImport_FindSharedFuncptr (prefix=0x64fb3d 
"PyInit", shortname=0x7fea516520c0 "lib",
    pathname=0x7fea5165efc0 
"/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/lib.cpython-310-x86_64-linux-gnu.so",
 fp=0x0)
    at ./Python/dynload_shlib.c:100
        funcname = "PyInit_lib", '\000' <repeats 22 times>, 
"\320\315qR\352\177\000\000\000\000\000\000\000\000\000\000\001\000\000\000\000\000\000\000\001\000\000\000\000\000\000\000\001\000\000\000\001",
 '\000' <repeats 43 times>, 
"O\373d\000\000\000\000\000\000g\037\001\000\000\000\000\200sfQ\352\177\000\000P\"j\020\377\177\000\000\002\000\000\000\000\000\000\000P\"j\020\377\177\000\000\000\000\000\000\000\000\000\000V\357Y\000\000\000\000\000\240\356Y\000\000\000\000\000\240
 eQ\352\177\000\000\070\067hQ\352\177\000\000"...
        pathbuf = 
"\002\000\000\000\000\000\000\000\264\212\035\305yz\306d\000\021\260S\352\177\000\000\236\272D\000\000\000\000\000\230\272\246S\352\177\000\000\000\000\000\000\000\000\000\000p\036hQ\352\177\000\000@!eQ\352\177\000\000p;xQ\352\177\000\000\240
 
eQ\352\177\000\000\000\000\000\000\000\000\000\000\023\305P\000\000\000\000\000\020\000\000\000\060\000\000\000\260#j\0
20\377\177\000\000\360\"j\020\377\177\000\000@!eQ\352\177\000\000\000\000\000\000\000\000\000\000Q\274D\000\000\000\000\000p\036hQ\352\177\000\000p;xQ\352\177\000\000\340\251p\000\000\000\000\000\340\251p\000\000\000\000\000\360\071j\000\000\000\000\000\003",
 '\000' <repeats 15 times>...
        dlopenflags = 1799967928
        handle = <optimized out>
        p = <optimized out>
#19 0x00000000004eaa4e in _PyImport_LoadDynamicModuleWithSpec 
(spec=0x7fea51652140, fp=0x0) at ./Python/importdl.c:137
        m = 0x0
        path = <optimized out>
        name = 0x7fea516520a0
        name_unicode = 0x7fea51681e70
        pathbytes = 0x7fea5165efa0
        hook_prefix = 0x64fb3d "PyInit"
        name_buf = 0x7fea516520c0 "lib"
        exportfunc = <optimized out>
        p0 = <optimized out>
        oldcontext = <optimized out>
        def = <optimized out>
        modules = <optimized out>
```
It is different with previously core dump, but I have no idea how this happens 
now. And the behavior is pretty consistent, if I unset the `ARROW_IO_THREADS` 
env var and run the program again, the previous core dump will be generated 
again.

*Summary:*

I don't know how to proceed any more. Basically:

1) I create a C++ library with arrow C++ library

2) I create a python binding for the C++ library using pybind

3) Instead of importing pyarrow.h header, I now import <arrow/c/abi.h> and 
<arrow/c/bridge.h> for briding

4) In my python program, I use both my python binding and pyarrow wheel

Do you think if this kind usage is supported or if it is some bug for arrow 
project?


was (Author: niyue):
[~kou] I follow your instruction (with some slight modification) to make it 
compiled and running but ran into some segfault during importing`pyarrow` 
module.
1) Since I create a python binding, I use this python binding in my Python 
code. `py::scoped_interpreter guard{}` seems not necessary because that will 
embed another interpreter, otherwise, pybind will report `the interpreter is 
already running` error. This is the only thing I revised.
2) In my python code:
```
import my_python_binding
import pyarrow # this lines triggers segfault
```
Some error like below is reported:
```
......
free(): invalid pointer
Fatal Python error: Aborted
Current thread 0x00007fae68f939c0 (most recent call first):
  File "<frozen importlib._bootstrap>", line 241 in _call_with_frames_removed
  File "<frozen importlib._bootstrap_external>", line 1176 in create_module
  File "<frozen importlib._bootstrap>", line 571 in module_from_spec
  File "<frozen importlib._bootstrap>", line 674 in _load_unlocked
  File "<frozen importlib._bootstrap>", line 1006 in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 1027 in _find_and_load
  File 
"/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/__init__.py",
 line 65 in <module>
  File "<frozen importlib._bootstrap>", line 241 in _call_with_frames_removed
  File "<frozen importlib._bootstrap_external>", line 883 in exec_module
  File "<frozen importlib._bootstrap>", line 688 in _load_unlocked
  File "<frozen importlib._bootstrap>", line 1006 in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 1027 in _find_and_load
  File "/usr/src/stonewave/bindings/python/<redated>/<redated>/search.py", line 
16 in search
```
The line 65 of `pyarrow/__init__.py` is `import pyarrow.lib as _lib`
3) a core dump was generated, and I use gdb to briefly view the core dump, it 
looks like this:
```
#0  raise (sig=<optimized out>) at ../sysdeps/unix/sysv/linux/raise.c:50
        set = \{__val = {0 <repeats 16 times>}}
        pid = <optimized out>
        tid = <optimized out>
        ret = <optimized out>
#1  <signal handler called>
No locals.
#2  0x00007fefa03eb735 in __gnu_cxx::__exchange_and_add (__mem=0xa, __val=-1) 
at 
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/ext/atomicity.h:50
No locals.
#3  __gnu_cxx::__exchange_and_add_dispatch (__mem=0xa, __val=-1) at 
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/ext/atomicity.h:84
No locals.
#4  std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_release (this=0x2) at 
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr_base.h:155
No locals.
#5  0x00007fefa03eb6da in 
std::__shared_count<(__gnu_cxx::_Lock_policy)2>::~__shared_count 
(this=0x1bca350) at 
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr_base.h:733
No locals.
#6  0x00007fefa0463c5e in std::__shared_ptr<arrow::StatusDetail, 
(__gnu_cxx::_Lock_policy)2>::~__shared_ptr (this=0x1bca348)
    at 
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr_base.h:1183
No locals.
#7  0x00007fefa0463c38 in std::shared_ptr<arrow::StatusDetail>::~shared_ptr 
(this=0x1bca348) at 
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr.h:121
No locals.
#8  0x00007fefa0463c06 in arrow::Status::State::~State (this=0x1bca320) at 
/vcpkg/installed/x64-linux-haswell/include/arrow/status.h:347
No locals.
#9  0x00007fefa0463b9e in arrow::Status::DeleteState (this=0x7ffdcda1dd20) at 
/vcpkg/installed/x64-linux-haswell/include/arrow/status.h:357
No locals.
#10 0x00007fef93345f0c in arrow::internal::GetEnvVar(char const*) () from 
/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/libarrow.so.1000
No symbol table info available.
#11 0x00007fef93398924 in arrow::io::internal::GetIOThreadPool() () from 
/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/libarrow.so.1000
No symbol table info available.
#12 0x00007fef928ca51e in _GLOBAL__sub_I_unity_6_cxx.cxx () from 
/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/libarrow.so.1000
No symbol table info available.
#13 0x00007fefae7fcfe2 in call_init (l=<optimized out>, argc=argc@entry=3, 
argv=argv@entry=0x7ffdcda20dc8, env=env@entry=0x7ffdcda20de8) at dl-init.c:72
        j = 0
        jm = <optimized out>
        addrs = <optimized out>
        init_array = <optimized out>
#14 0x00007fefae7fd0e9 in call_init (env=0x7ffdcda20de8, argv=0x7ffdcda20dc8, 
argc=3, l=<optimized out>) at dl-init.c:30
        init_array = <optimized out>
        j = <optimized out>
        jm = <optimized out>
        addrs = <optimized out>
#15 _dl_init (main_map=0x1baa930, argc=3, argv=0x7ffdcda20dc8, 
env=0x7ffdcda20de8) at dl-init.c:119
        preinit_array = <optimized out>
        preinit_array_size = <optimized out>
        i = <optimized out>
#16 0x00007fef9a56faed in __GI__dl_catch_exception 
(exception=exception@entry=0x0, operate=operate@entry=0x7fefae8005d0 
<call_dl_init>, args=args@entry=0x7ffdcda1dfd0) at dl-error-skeleton.c:182
        old = <optimized out>
        errcode = 0
--Type <RET> for more, q to quit, c to continue without paging--
        c = \{exception = 0x7ffdcda1df30, errcode = 0x0, env = {{__jmpbuf = 
{140728053391152, 0, 0, 140666978835288, 29011096, 140666978907692, 
140666978805312, 140666981352408}, __mask_was_saved = -1790078976,
              __saved_mask = \{__val = {0, 140728053391248, 140667076916640, 0, 
0, 0, 0, 0, 0, 0, 0, 12468370135039750697, 140728053391728, 140728053391216, 
140728053391728, 140728053391392}}}}}
        old = <optimized out>
#17 0x00007fefae801058 in dl_open_worker (a=a@entry=0x7ffdcda1e170) at 
dl-open.c:758
        init_args = \{new = 0x1baa930, argc = 3, argv = 0x7ffdcda20dc8, env = 
0x7ffdcda20de8}
        args = 0x7ffdcda1e170
        file = <optimized out>
        mode = <optimized out>
        call_map = <optimized out>
        dst = <optimized out>
        new = 0x1baa930
        __PRETTY_FUNCTION__ = "dl_open_worker"
        r = <optimized out>
        reloc_mode = <optimized out>
        nmaps = <optimized out>
        l = <optimized out>
        maps = <error reading variable maps (value requires 34359738360 bytes, 
which is more than max-value-size)>
        relocation_in_progress = <optimized out>
        any_tls = <optimized out>
#18 0x00007fef9a56fa90 in __GI__dl_catch_exception 
(exception=exception@entry=0x7ffdcda1e150, operate=operate@entry=0x7fefae800ca0 
<dl_open_worker>, args=args@entry=0x7ffdcda1e170) at dl-error-skeleton.c:208
        errcode = 0
        c = \{exception = 0x7ffdcda1e150, errcode = 0x7ffdcda1e05c, env = 
{{__jmpbuf = {2147483650, -855320820084358115, -74376, 3, 5369100, -2, 
-863008342291758051, -855308368215391203}, __mask_was_saved = 0,
              __saved_mask = {__val = {140667001712800, 140667001712800, 
4506233, 140667001207448, 15, 140667001207392, 140667001712848, 
140728053391680, 140728053391712, 140728053392737, 660865357547929600,
                  140728053392480, 0, 257, 140728053391712, 6671076}}}}}
        old = 0x7ffdcda1e240
#19 0x00007fefae8008fa in _dl_open (file=0x7fef95808100 
"/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/lib.cpython-310-x86_64-linux-gnu.so",
 mode=-2147483646,
    caller_dlopen=0x51ed0c <_PyImport_FindSharedFuncptr+284>, nsid=-2, argc=3, 
argv=0x7ffdcda1e150, env=0x7ffdcda20de8) at dl-open.c:837
        args = {file = 0x7fef95808100 
"/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/lib.cpython-310-x86_64-linux-gnu.so",
 mode = -2147483646,
          caller_dlopen = 0x51ed0c <_PyImport_FindSharedFuncptr+284>, map = 
0x1baa930, nsid = 0, original_global_scope_pending_adds = 0, argc = 3, argv = 
0x7ffdcda20dc8, env = 0x7ffdcda20de8}
        exception = {objname = 0x439830 <list_richcompare> 
"UAWAVAUATSPH\213G\b\366\200\253", errstring = 0x7ffdcda1e250 "8Y\217\001",
          message_buffer = 0xfbad8001 <error: Cannot access memory at address 
0xfbad8001>}
        errcode = <optimized out>
        __PRETTY_FUNCTION__ = "_dl_open"
#20 0x00007fef9a75a258 in dlopen_doit (a=a@entry=0x7ffdcda1e390) at dlopen.c:66
        args = 0x7ffdcda1e390
#21 0x00007fef9a56fa90 in __GI__dl_catch_exception 
(exception=exception@entry=0x7ffdcda1e330, operate=operate@entry=0x7fef9a75a200 
<dlopen_doit>, args=args@entry=0x7ffdcda1e390) at dl-error-skeleton.c:208
        errcode = 32751
        c = {exception = 0x7ffdcda1e330, errcode = 0x7ffdcda1e23c, env = 
{{__jmpbuf = {26171704, 864236073942795293, -74376, 140666982652160, 
140666983577264, 140666982138112, -863008342354672611,
                -855308368215391203}, __mask_was_saved = 0, __saved_mask = 
{__val = {660865357547929600, 9223372036854775807, 258, 0, 0, 140666982652160, 
140728053392480, 140666982138112, 5216203, 206158430248,
                  140728053392336, 140728053392128, 140667001246696, 
140667001246696, 2, 140667001308992}}}}}
        old = 0x0
#22 0x00007fef9a56fb4f in __GI__dl_catch_error 
(objname=objname@entry=0x18f5940, errstring=errstring@entry=0x18f5948, 
mallocedp=mallocedp@entry=0x18f5938, operate=operate@entry=0x7fef9a75a200 
<dlopen_doit>,
    args=args@entry=0x7ffdcda1e390) at dl-error-skeleton.c:227
        exception = \{objname = 0x0, errstring = 0x2 <error: Cannot access 
memory at address 0x2>, message_buffer = 0x1 <error: Cannot access memory at 
address 0x1>}
        errorcode = <optimized out>
#23 0x00007fef9a75aa65 in _dlerror_run (operate=operate@entry=0x7fef9a75a200 
<dlopen_doit>, args=args@entry=0x7ffdcda1e390) at dlerror.c:170
        result = 0x18f5930
--Type <RET> for more, q to quit, c to continue without paging--
#24 0x00007fef9a75a2e4 in __dlopen (file=<optimized out>, mode=<optimized out>) 
at dlopen.c:87
        args = {file = 0x7fef95808100 
"/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/lib.cpython-310-x86_64-linux-gnu.so",
 mode = 2, new = 0x1a4acd0,
          caller = 0x51ed0c <_PyImport_FindSharedFuncptr+284>}
#25 0x000000000051ed0c in _PyImport_FindSharedFuncptr (prefix=0x64fb3d 
"PyInit", shortname=0x7fef959676b0 "lib",
    pathname=0x7fef95808100 
"/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/lib.cpython-310-x86_64-linux-gnu.so",
 fp=0x0) at ./Python/dynload_shlib.c:100
        funcname = "PyInit_lib", '\000' <repeats 22 times>, 
"\340\371\234\225\357\177\000\000\000\000\000\000\000\000\000\000\001\000\000\000\000\000\000\000\001\000\000\000\000\000\000\000\001\000\000\000\001",
 '\000' <repeats 43 times>, 
"O\373d\000\000\000\000\000\320\254\244\001\000\000\000\000\060=\204\225\357\177\000\000P\345\241\315\375\177\000\000\002\000\000\000\000\000\000\000P\345\241\315\375\177\000\000\000\000\000\000\000\000\000\000V\357Y\000\000\000\000\000\240\356Y\000\000\000\000\000\220v\226\225\357\177\000\000\070\004\212\225\357\177\000\000"...
        pathbuf = 
"\002\000\000\000\000\000\000\000\350\357`\331\210,eY\000\321\254\226\357\177\000\000\236\272D\000\000\000\000\000\230z\243\226\357\177\000\000\000\000\000\000\000\000\000\000p\307\177\225\357\177\000\000\000Y\210\225\357\177\000\000\260A\212\225\357\177\000\000\220v\226\225\357\177\000\000\000\000\000\000\000\000\000\000\023\305P\000\000\000\000\000\020\000\000\000\060\000\000\000\260\346\241\315\375\177\000\000\360\345\241\315\375\177\000\000\000Y\210\225\357\177\000\000\000\000\000\000\000\000\000\000Q\274D\000\000\000\000\000p\307\177\225\357\177\000\000\260A\212\225\357\177\000\000\340\251p\000\000\000\000\000\340\251p\000\000\000\000\000\360\071j\000\000\000\000\000\003",
 '\000' <repeats 15 times>...
        dlopenflags = 29139752
        handle = <optimized out>
        p = <optimized out>
#26 0x00000000004eaa4e in _PyImport_LoadDynamicModuleWithSpec 
(spec=0x7fef95885900, fp=0x0) at ./Python/importdl.c:137
        m = 0x0
        path = <optimized out>
        name = 0x7fef95967690
        name_unicode = 0x7fef957fc770
        pathbytes = 0x7fef958080e0
        hook_prefix = 0x64fb3d "PyInit"
        name_buf = 0x7fef959676b0 "lib"
        exportfunc = <optimized out>
        p0 = <optimized out>
        oldcontext = <optimized out>
        def = <optimized out>
        modules = <optimized out>
#27 0x00000000004ea40e in _imp_create_dynamic_impl (module=<optimized out>, 
spec=0x7fef95885900, file=<optimized out>) at Python/import.c:2049
        name = 0x7fef957fc770
        path = 0x7fef958a41b0
        tstate = <optimized out>
        mod = 0x0
        fp = 0x0
#28 _imp_create_dynamic (module=<optimized out>, args=<optimized out>, 
nargs=<optimized out>) at Python/clinic/import.c.h:330
        file = <optimized out>
        return_value = 0x0
        spec = 0x7fef95885900
#29 0x000000000059ef56 in cfunction_vectorcall_FASTCALL (func=0x7fef96ac58a0, 
args=0x7fef95885168, nargsf=<optimized out>, kwnames=<optimized out>) at 
Objects/methodobject.c:430
        tstate = 0x1a4acd0
        nargs = 1
        meth = 0xa
        result = <optimized out>
#30 0x00000000004c1fe7 in do_call_core (tstate=0x1a4acd0, 
trace_info=0x7ffdcda1e7c0, func=0x7fef96ac58a0, callargs=0x7fef95885150, 
kwdict=0x0) at Python/ceval.c:5915
        result = <optimized out>
        nargs = <optimized out>
        self = <optimized out>
--Type <RET> for more, q to quit, c to continue without paging--
#31 _PyEval_EvalFrameDefault (tstate=<optimized out>, f=0x7fef96a5f490, 
throwflag=<optimized out>) at Python/ceval.c:4277
        func = 0x7fef96ac58a0
        kwargs = <optimized out>
        callargs = 0x7fef95885150
        result = <optimized out>
        opcode_targets = {0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4bbe90 
<_PyEval_EvalFrameDefault+2064>, 0x4bbeda <_PyEval_EvalFrameDefault+2138>, 
0x4bbf20 <_PyEval_EvalFrameDefault+2208>,
          0x4bbfba <_PyEval_EvalFrameDefault+2362>, 0x4bc00f 
<_PyEval_EvalFrameDefault+2447>, 0x4bbf69 <_PyEval_EvalFrameDefault+2281>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555>,
          0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4bbd3f 
<_PyEval_EvalFrameDefault+1727>, 0x4bc070 <_PyEval_EvalFrameDefault+2544>, 
0x4bc0e7 <_PyEval_EvalFrameDefault+2663>,
          0x4bc15e <_PyEval_EvalFrameDefault+2782>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 
0x4bc23f <_PyEval_EvalFrameDefault+3007>,
          0x4bc3e8 <_PyEval_EvalFrameDefault+3432>, 0x4bcda4 
<_PyEval_EvalFrameDefault+5924>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 
0x4bc2b6 <_PyEval_EvalFrameDefault+3126>,
          0x4bc353 <_PyEval_EvalFrameDefault+3283>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555>, 0x4bc5a7 <_PyEval_EvalFrameDefault+3879>, 
0x4bc6af <_PyEval_EvalFrameDefault+4143>,
          0x4bc76f <_PyEval_EvalFrameDefault+4335>, 0x4bc804 
<_PyEval_EvalFrameDefault+4484>, 0x4bc512 <_PyEval_EvalFrameDefault+3730>, 
0x4bc47d <_PyEval_EvalFrameDefault+3581>,
          0x4bcece <_PyEval_EvalFrameDefault+6222>, 0x4bce39 
<_PyEval_EvalFrameDefault+6073>, 0x4c0bbe <_PyEval_EvalFrameDefault+21822>, 
0x4c0ff9 <_PyEval_EvalFrameDefault+22905>,
          0x4c1067 <_PyEval_EvalFrameDefault+23015>, 0x4c10d5 
<_PyEval_EvalFrameDefault+23125>, 0x4c142b <_PyEval_EvalFrameDefault+23979>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555> <repeats 14 times>,
          0x4c19fa <_PyEval_EvalFrameDefault+25466>, 0x4bd6de 
<_PyEval_EvalFrameDefault+8286>, 0x4bd78d <_PyEval_EvalFrameDefault+8461>, 
0x4c175b <_PyEval_EvalFrameDefault+24795>,
          0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4bdc9f 
<_PyEval_EvalFrameDefault+9759>, 0x4bd01c <_PyEval_EvalFrameDefault+6556>, 
0x4bd0dc <_PyEval_EvalFrameDefault+6748>,
          0x4bcd0f <_PyEval_EvalFrameDefault+5775>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555>, 0x4bcf63 <_PyEval_EvalFrameDefault+6371>, 
0x4bd45a <_PyEval_EvalFrameDefault+7642>,
          0x4bd51b <_PyEval_EvalFrameDefault+7835>, 0x4bc899 
<_PyEval_EvalFrameDefault+4633>, 0x4bc92e <_PyEval_EvalFrameDefault+4782>, 
0x4bc9c3 <_PyEval_EvalFrameDefault+4931>,
          0x4bca58 <_PyEval_EvalFrameDefault+5080>, 0x4bcaed 
<_PyEval_EvalFrameDefault+5229>, 0x4bcc72 <_PyEval_EvalFrameDefault+5618>, 
0x4c14e1 <_PyEval_EvalFrameDefault+24161>,
          0x4c1558 <_PyEval_EvalFrameDefault+24280>, 0x4bd5cb 
<_PyEval_EvalFrameDefault+8011>, 0x4bde54 <_PyEval_EvalFrameDefault+10196>, 
0x4bd962 <_PyEval_EvalFrameDefault+8930>,
          0x4bd855 <_PyEval_EvalFrameDefault+8661>, 0x4bddfc 
<_PyEval_EvalFrameDefault+10108>, 0x4bd171 <_PyEval_EvalFrameDefault+6897>, 
0x4bd206 <_PyEval_EvalFrameDefault+7046>,
          0x4bd29b <_PyEval_EvalFrameDefault+7195>, 0x4bd330 
<_PyEval_EvalFrameDefault+7344>, 0x4bd3c5 <_PyEval_EvalFrameDefault+7493>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555>,
          0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4bed46 
<_PyEval_EvalFrameDefault+14022>, 0x4c2ef5 <_PyEval_EvalFrameDefault+30837>, 
0x4c008f <_PyEval_EvalFrameDefault+18959>,
          0x4bf0e3 <_PyEval_EvalFrameDefault+14947>, 0x4c2f5b 
<_PyEval_EvalFrameDefault+30939>, 0x4bdc60 <_PyEval_EvalFrameDefault+9696>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555>,
          0x4bdb97 <_PyEval_EvalFrameDefault+9495>, 0x4bdee7 
<_PyEval_EvalFrameDefault+10343>, 0x4bdf9a <_PyEval_EvalFrameDefault+10522>, 
0x4bdffe <_PyEval_EvalFrameDefault+10622>,
          0x4c1604 <_PyEval_EvalFrameDefault+24452>, 0x4be190 
<_PyEval_EvalFrameDefault+11024>, 0x4be223 <_PyEval_EvalFrameDefault+11171>, 
0x4be2c3 <_PyEval_EvalFrameDefault+11331>,
          0x4be342 <_PyEval_EvalFrameDefault+11458>, 0x4be3c3 
<_PyEval_EvalFrameDefault+11587>, 0x4c26d1 <_PyEval_EvalFrameDefault+28753>, 
0x4bbdcd <_PyEval_EvalFrameDefault+1869>,
          0x4be465 <_PyEval_EvalFrameDefault+11749>, 0x4bea95 
<_PyEval_EvalFrameDefault+13333>, 0x4bec25 <_PyEval_EvalFrameDefault+13733>, 
0x4beec7 <_PyEval_EvalFrameDefault+14407>,
          0x4befda <_PyEval_EvalFrameDefault+14682>, 0x4bf953 
<_PyEval_EvalFrameDefault+17107>, 0x4bfb3b <_PyEval_EvalFrameDefault+17595>, 
0x4bfec6 <_PyEval_EvalFrameDefault+18502>,
          0x4c047d <_PyEval_EvalFrameDefault+19965>, 0x4c05a9 
<_PyEval_EvalFrameDefault+20265>, 0x4c08f0 <_PyEval_EvalFrameDefault+21104>, 
0x4c0a2a <_PyEval_EvalFrameDefault+21418>,
          0x4c0b66 <_PyEval_EvalFrameDefault+21734>, 0x4c05e7 
<_PyEval_EvalFrameDefault+20327>, 0x4c0764 <_PyEval_EvalFrameDefault+20708>, 
0x4be53b <_PyEval_EvalFrameDefault+11963>,
          0x4bfbd3 <_PyEval_EvalFrameDefault+17747>, 0x4bfc69 
<_PyEval_EvalFrameDefault+17897>, 0x4c2f1b <_PyEval_EvalFrameDefault+30875>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555>,
          0x4bfd26 <_PyEval_EvalFrameDefault+18086>, 0x4c1706 
<_PyEval_EvalFrameDefault+24710>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 
0x4bbd76 <_PyEval_EvalFrameDefault+1782>,
          0x4bbe2e <_PyEval_EvalFrameDefault+1966>, 0x4be715 
<_PyEval_EvalFrameDefault+12437>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555>,
          0x4bdb4d <_PyEval_EvalFrameDefault+9421>, 0x4c2ec8 
<_PyEval_EvalFrameDefault+30792>, 0x4c1c7d <_PyEval_EvalFrameDefault+26109>, 
0x4bbc00 <_PyEval_EvalFrameDefault+1408>,
          0x4c2502 <_PyEval_EvalFrameDefault+28290>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555>, 0x4be7dd <_PyEval_EvalFrameDefault+12637>, 
0x4be912 <_PyEval_EvalFrameDefault+12946>,
          0x4be971 <_PyEval_EvalFrameDefault+13041>, 0x4be777 
<_PyEval_EvalFrameDefault+12535>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555>,
          0x4c1d13 <_PyEval_EvalFrameDefault+26259>, 0x4c1dcf 
<_PyEval_EvalFrameDefault+26447>, 0x4c18cc <_PyEval_EvalFrameDefault+25164>, 
0x4c2750 <_PyEval_EvalFrameDefault+28880>,
          0x4bcb82 <_PyEval_EvalFrameDefault+5378>, 0x4bcbfa 
<_PyEval_EvalFrameDefault+5498>, 0x4bf45b <_PyEval_EvalFrameDefault+15835>, 
0x4be83d <_PyEval_EvalFrameDefault+12733>,
          0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 
0x4c0c25 <_PyEval_EvalFrameDefault+21925>,
          0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4c1860 
<_PyEval_EvalFrameDefault+25056>, 0x4c25d0 <_PyEval_EvalFrameDefault+28496>, 
0x4bf239 <_PyEval_EvalFrameDefault+15289>,
          0x4be9d7 <_PyEval_EvalFrameDefault+13143>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 
0x4c1af3 <_PyEval_EvalFrameDefault+25715>,
          0x4c1b9f <_PyEval_EvalFrameDefault+25887>, 0x4bedb8 
<_PyEval_EvalFrameDefault+14136>, 0x4bee4f <_PyEval_EvalFrameDefault+14287>, 
0x4bf3e1 <_PyEval_EvalFrameDefault+15713>,
          0x4bf36e <_PyEval_EvalFrameDefault+15598>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555> <repeats 90 times>}
        PyId_displayhook = \{string = 0x64aae2 "displayhook", index = -1}
        PyId_send = \{string = 0x6a362a "send", index = -1}
        PyId___build_class__ = \{string = 0x64ac69 "__build_class__", index = 
18}
--Type <RET> for more, q to quit, c to continue without paging--
        PyId___annotations__ = \{string = 0x655175 "__annotations__", index = 
-1}
        PyId___aenter__ = \{string = 0x64ae53 "__aenter__", index = -1}
        PyId___aexit__ = \{string = 0x64ae5e "__aexit__", index = -1}
        PyId___enter__ = \{string = 0x606990 "__enter__", index = 40}
        PyId___exit__ = \{string = 0x60699a "__exit__", index = 41}
        trace_info = {code = 0x0, bounds = {ar_start = 15, ar_end = 0, ar_line 
= -1767671200, opaque = {computed_line = -1767152416, lo_next = 0x7ffdcda1e830 
"\220\364\245\226\357\177",
              limit = 0x5989e3 <frame_dealloc+163> 
"\353\333A\213D$P\205\300~>1\333\353\032f.\017\037\204"}}, cframe = 
\{use_tracing = 0, previous = 0x7ffdcda1ea40}}
        _unknown_opcode = <optimized out>
#32 0x00000000004bb57d in _PyEval_EvalFrame (tstate=0x1a4acd0, 
f=0x7fef96a5f490, throwflag=0) at ./Include/internal/pycore_ceval.h:46
No locals.
#33 _PyEval_Vector (tstate=0x1a4acd0, con=0x7fef96a79520, locals=<optimized 
out>, args=<optimized out>, argcount=<optimized out>, kwnames=<optimized out>) 
at Python/ceval.c:5065
        f = 0x7fef96a5f490
        retval = <optimized out>
#34 0x00000000004c4823 in call_function (tstate=<optimized out>, 
tstate@entry=0x1a4acd0, trace_info=trace_info@entry=0x7ffdcda1ea10, 
pp_stack=pp_stack@entry=0x7ffdcda1eac8, oparg=<optimized out>,
    oparg@entry=27569360, kwnames=0xffffffff, kwnames@entry=0x0) at 
./Include/cpython/abstract.h:115
        pfunc = 0x7fef96ad5140
        func = 0x7fef96a79510
        nkwargs = <optimized out>
        nargs = <optimized out>
        stack = 0x7fef96ad5148
        x = <optimized out>
        w = <optimized out>
#35 0x00000000004c1c0b in _PyEval_EvalFrameDefault (tstate=<optimized out>, 
f=0x7fef96ad4fc0, throwflag=<optimized out>) at Python/ceval.c:4181
        sp = 0x7fef96ad5158
        meth = <optimized out>
        res = <optimized out>
        opcode_targets = {0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4bbe90 
<_PyEval_EvalFrameDefault+2064>, 0x4bbeda <_PyEval_EvalFrameDefault+2138>, 
0x4bbf20 <_PyEval_EvalFrameDefault+2208>,
          0x4bbfba <_PyEval_EvalFrameDefault+2362>, 0x4bc00f 
<_PyEval_EvalFrameDefault+2447>, 0x4bbf69 <_PyEval_EvalFrameDefault+2281>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555>,
          0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4bbd3f 
<_PyEval_EvalFrameDefault+1727>, 0x4bc070 <_PyEval_EvalFrameDefault+2544>, 
0x4bc0e7 <_PyEval_EvalFrameDefault+2663>,
          0x4bc15e <_PyEval_EvalFrameDefault+2782>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 
0x4bc23f <_PyEval_EvalFrameDefault+3007>,
          0x4bc3e8 <_PyEval_EvalFrameDefault+3432>, 0x4bcda4 
<_PyEval_EvalFrameDefault+5924>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 
0x4bc2b6 <_PyEval_EvalFrameDefault+3126>,
          0x4bc353 <_PyEval_EvalFrameDefault+3283>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555>, 0x4bc5a7 <_PyEval_EvalFrameDefault+3879>, 
0x4bc6af <_PyEval_EvalFrameDefault+4143>,
          0x4bc76f <_PyEval_EvalFrameDefault+4335>, 0x4bc804 
<_PyEval_EvalFrameDefault+4484>, 0x4bc512 <_PyEval_EvalFrameDefault+3730>, 
0x4bc47d <_PyEval_EvalFrameDefault+3581>,
          0x4bcece <_PyEval_EvalFrameDefault+6222>, 0x4bce39 
<_PyEval_EvalFrameDefault+6073>, 0x4c0bbe <_PyEval_EvalFrameDefault+21822>, 
0x4c0ff9 <_PyEval_EvalFrameDefault+22905>,
          0x4c1067 <_PyEval_EvalFrameDefault+23015>, 0x4c10d5 
<_PyEval_EvalFrameDefault+23125>, 0x4c142b <_PyEval_EvalFrameDefault+23979>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555> <repeats 14 times>,
          0x4c19fa <_PyEval_EvalFrameDefault+25466>, 0x4bd6de 
<_PyEval_EvalFrameDefault+8286>, 0x4bd78d <_PyEval_EvalFrameDefault+8461>, 
0x4c175b <_PyEval_EvalFrameDefault+24795>,
          0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4bdc9f 
<_PyEval_EvalFrameDefault+9759>, 0x4bd01c <_PyEval_EvalFrameDefault+6556>, 
0x4bd0dc <_PyEval_EvalFrameDefault+6748>,
          0x4bcd0f <_PyEval_EvalFrameDefault+5775>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555>, 0x4bcf63 <_PyEval_EvalFrameDefault+6371>, 
0x4bd45a <_PyEval_EvalFrameDefault+7642>,
          0x4bd51b <_PyEval_EvalFrameDefault+7835>, 0x4bc899 
<_PyEval_EvalFrameDefault+4633>, 0x4bc92e <_PyEval_EvalFrameDefault+4782>, 
0x4bc9c3 <_PyEval_EvalFrameDefault+4931>,
          0x4bca58 <_PyEval_EvalFrameDefault+5080>, 0x4bcaed 
<_PyEval_EvalFrameDefault+5229>, 0x4bcc72 <_PyEval_EvalFrameDefault+5618>, 
0x4c14e1 <_PyEval_EvalFrameDefault+24161>,
          0x4c1558 <_PyEval_EvalFrameDefault+24280>, 0x4bd5cb 
<_PyEval_EvalFrameDefault+8011>, 0x4bde54 <_PyEval_EvalFrameDefault+10196>, 
0x4bd962 <_PyEval_EvalFrameDefault+8930>,
          0x4bd855 <_PyEval_EvalFrameDefault+8661>, 0x4bddfc 
<_PyEval_EvalFrameDefault+10108>, 0x4bd171 <_PyEval_EvalFrameDefault+6897>, 
0x4bd206 <_PyEval_EvalFrameDefault+7046>,
          0x4bd29b <_PyEval_EvalFrameDefault+7195>, 0x4bd330 
<_PyEval_EvalFrameDefault+7344>, 0x4bd3c5 <_PyEval_EvalFrameDefault+7493>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555>,
          0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4bed46 
<_PyEval_EvalFrameDefault+14022>, 0x4c2ef5 <_PyEval_EvalFrameDefault+30837>, 
0x4c008f <_PyEval_EvalFrameDefault+18959>,
          0x4bf0e3 <_PyEval_EvalFrameDefault+14947>, 0x4c2f5b 
<_PyEval_EvalFrameDefault+30939>, 0x4bdc60 <_PyEval_EvalFrameDefault+9696>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555>,
          0x4bdb97 <_PyEval_EvalFrameDefault+9495>, 0x4bdee7 
<_PyEval_EvalFrameDefault+10343>, 0x4bdf9a <_PyEval_EvalFrameDefault+10522>, 
0x4bdffe <_PyEval_EvalFrameDefault+10622>,
          0x4c1604 <_PyEval_EvalFrameDefault+24452>, 0x4be190 
<_PyEval_EvalFrameDefault+11024>, 0x4be223 <_PyEval_EvalFrameDefault+11171>, 
0x4be2c3 <_PyEval_EvalFrameDefault+11331>,
--Type <RET> for more, q to quit, c to continue without paging--
          0x4be342 <_PyEval_EvalFrameDefault+11458>, 0x4be3c3 
<_PyEval_EvalFrameDefault+11587>, 0x4c26d1 <_PyEval_EvalFrameDefault+28753>, 
0x4bbdcd <_PyEval_EvalFrameDefault+1869>,
          0x4be465 <_PyEval_EvalFrameDefault+11749>, 0x4bea95 
<_PyEval_EvalFrameDefault+13333>, 0x4bec25 <_PyEval_EvalFrameDefault+13733>, 
0x4beec7 <_PyEval_EvalFrameDefault+14407>,
          0x4befda <_PyEval_EvalFrameDefault+14682>, 0x4bf953 
<_PyEval_EvalFrameDefault+17107>, 0x4bfb3b <_PyEval_EvalFrameDefault+17595>, 
0x4bfec6 <_PyEval_EvalFrameDefault+18502>,
          0x4c047d <_PyEval_EvalFrameDefault+19965>, 0x4c05a9 
<_PyEval_EvalFrameDefault+20265>, 0x4c08f0 <_PyEval_EvalFrameDefault+21104>, 
0x4c0a2a <_PyEval_EvalFrameDefault+21418>,
          0x4c0b66 <_PyEval_EvalFrameDefault+21734>, 0x4c05e7 
<_PyEval_EvalFrameDefault+20327>, 0x4c0764 <_PyEval_EvalFrameDefault+20708>, 
0x4be53b <_PyEval_EvalFrameDefault+11963>,
          0x4bfbd3 <_PyEval_EvalFrameDefault+17747>, 0x4bfc69 
<_PyEval_EvalFrameDefault+17897>, 0x4c2f1b <_PyEval_EvalFrameDefault+30875>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555>,
          0x4bfd26 <_PyEval_EvalFrameDefault+18086>, 0x4c1706 
<_PyEval_EvalFrameDefault+24710>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 
0x4bbd76 <_PyEval_EvalFrameDefault+1782>,
          0x4bbe2e <_PyEval_EvalFrameDefault+1966>, 0x4be715 
<_PyEval_EvalFrameDefault+12437>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555>,
          0x4bdb4d <_PyEval_EvalFrameDefault+9421>, 0x4c2ec8 
<_PyEval_EvalFrameDefault+30792>, 0x4c1c7d <_PyEval_EvalFrameDefault+26109>, 
0x4bbc00 <_PyEval_EvalFrameDefault+1408>,
          0x4c2502 <_PyEval_EvalFrameDefault+28290>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555>, 0x4be7dd <_PyEval_EvalFrameDefault+12637>, 
0x4be912 <_PyEval_EvalFrameDefault+12946>,
          0x4be971 <_PyEval_EvalFrameDefault+13041>, 0x4be777 
<_PyEval_EvalFrameDefault+12535>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 
0x4c29f3 <_PyEval_EvalFrameDefault+29555>,
          0x4c1d13 <_PyEval_EvalFrameDefault+26259>, 0x4c1dcf 
<_PyEval_EvalFrameDefault+26447>, 0x4c18cc <_PyEval_EvalFrameDefault+25164>, 
0x4c2750 <_PyEval_EvalFrameDefault+28880>,
          0x4bcb82 <_PyEval_EvalFrameDefault+5378>, 0x4bcbfa 
<_PyEval_EvalFrameDefault+5498>, 0x4bf45b <_PyEval_EvalFrameDefault+15835>, 
0x4be83d <_PyEval_EvalFrameDefault+12733>,
          0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 
0x4c0c25 <_PyEval_EvalFrameDefault+21925>,
          0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 0x4c1860 
<_PyEval_EvalFrameDefault+25056>, 0x4c25d0 <_PyEval_EvalFrameDefault+28496>, 
0x4bf239 <_PyEval_EvalFrameDefault+15289>,
          0x4be9d7 <_PyEval_EvalFrameDefault+13143>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555>, 0x4c29f3 <_PyEval_EvalFrameDefault+29555>, 
0x4c1af3 <_PyEval_EvalFrameDefault+25715>,
          0x4c1b9f <_PyEval_EvalFrameDefault+25887>, 0x4bedb8 
<_PyEval_EvalFrameDefault+14136>, 0x4bee4f <_PyEval_EvalFrameDefault+14287>, 
0x4bf3e1 <_PyEval_EvalFrameDefault+15713>,
          0x4bf36e <_PyEval_EvalFrameDefault+15598>, 0x4c29f3 
<_PyEval_EvalFrameDefault+29555> <repeats 90 times>}
        PyId_displayhook = \{string = 0x64aae2 "displayhook", index = -1}
        PyId_send = \{string = 0x6a362a "send", index = -1}
        PyId___build_class__ = \{string = 0x64ac69 "__build_class__", index = 
18}
        PyId___annotations__ = \{string = 0x655175 "__annotations__", index = 
-1}
        PyId___aenter__ = \{string = 0x64ae53 "__aenter__", index = -1}
        PyId___aexit__ = \{string = 0x64ae5e "__aexit__", index = -1}
        PyId___enter__ = \{string = 0x606990 "__enter__", index = 40}
        PyId___exit__ = \{string = 0x60699a "__exit__", index = 41}
        trace_info = \{code = 0x0, bounds = {ar_start = 64, ar_end = 0, ar_line 
= -1786174976, opaque = {computed_line = 28322560, lo_next = 0x725a70 
<PyMethod_Type> "\026", limit = 0x7fef95884eb0 "\003"}},
          cframe = \{use_tracing = 0, previous = 0x7ffdcda1ec90}}
        _unknown_opcode = <optimized out>
#36 0x00000000004bb57d in _PyEval_EvalFrame (tstate=0x1a4acd0, 
f=0x7fef96ad4fc0, throwflag=0) at ./Include/internal/pycore_ceval.h:46
No locals.
#37 _PyEval_Vector (tstate=0x1a4acd0, con=0x7fef96afe600, locals=<optimized 
out>, args=<optimized out>, argcount=<optimized out>, kwnames=<optimized out>) 
at Python/ceval.c:5065
        f = 0x7fef96ad4fc0
        retval = <optimized out>
```
It seems both my python binding and pyarrow uses arrow's code to do some 
initialization, the `arrow::io::internal::GetIOThreadPool` for some reason 
fails to work in this case and caused the segfault.
4) Since it is related with 
`::arrow::internal::GetEnvVar("ARROW_IO_THREADS");`, I tried setting the 
`ARROW_IO_THREADS` env var to a number and gave it another try. And the program 
still caused a segfault, but reporting a different error (there is no `free(): 
invalid pointer` printed this time):
```
Fatal Python error: Segmentation fault
Current thread 0x00007fea55bd09c0 (most recent call first):
  File "<frozen importlib._bootstrap>", line 241 in _call_with_frames_removed
  File "<frozen importlib._bootstrap_external>", line 1176 in create_module
  File "<frozen importlib._bootstrap>", line 571 in module_from_spec
  File "<frozen importlib._bootstrap>", line 674 in _load_unlocked
  File "<frozen importlib._bootstrap>", line 1006 in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 1027 in _find_and_load
  File 
"/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/__init__.py",
 line 65 in <module>
  File "<frozen importlib._bootstrap>", line 241 in _call_with_frames_removed
  File "<frozen importlib._bootstrap_external>", line 883 in exec_module
  File "<frozen importlib._bootstrap>", line 688 in _load_unlocked
  File "<frozen importlib._bootstrap>", line 1006 in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 1027 in _find_and_load
  File "/usr/src/stonewave/bindings/python/<redated>/<redated>/search.py", line 
16 in search
```
5) I used gdb to view the core dump again, and it reported error like below:
```
#0  raise (sig=<optimized out>) at ../sysdeps/unix/sysv/linux/raise.c:50
        set = \{__val = {0 <repeats 16 times>}}
        pid = <optimized out>
        tid = <optimized out>
        ret = <optimized out>
#1  <signal handler called>
No locals.
#2  0x00007fea5d4a60bb in std::__shared_ptr<arrow::DataType, 
(__gnu_cxx::_Lock_policy)2>::__shared_ptr (this=0x5)
    at 
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr_base.h:1181
No locals.
#3  0x00007fea5d4a6093 in std::shared_ptr<arrow::DataType>::shared_ptr 
(this=0x5) at 
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr.h:149
No locals.
#4  0x00007fea5d9da822 in arrow::int32 () at 
/vcpkg/buildtrees/arrow/src/c4eb0a0543-8e1ffd6d16.clean/cpp/src/arrow/type.cc:2165
        result = warning: RTTI symbol not found for class 
'std::_Sp_counted_ptr_inplace<arrow::Int32Type, 
std::allocator<arrow::Int32Type>, (__gnu_cxx::_Lock_policy)2>'
warning: RTTI symbol not found for class 
'std::_Sp_counted_ptr_inplace<arrow::Int32Type, 
std::allocator<arrow::Int32Type>, (__gnu_cxx::_Lock_policy)2>'
std::shared_ptr<arrow::DataType> (use count 1053, weak count 0) = \{get() = 
0x108ba70}
#5  0x00007fea364ff4af in _GLOBAL__sub_I_unity_1_cxx.cxx () from 
/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/libarrow_dataset.so.1000
No symbol table info available.
#6  0x00007fea6b82ffe2 in call_init (l=<optimized out>, argc=argc@entry=5, 
argv=argv@entry=0x7fff106aae38, env=env@entry=0x168fd50) at dl-init.c:72
        j = 0
        jm = <optimized out>
        addrs = <optimized out>
        init_array = <optimized out>
#7  0x00007fea6b8300e9 in call_init (env=0x168fd50, argv=0x7fff106aae38, 
argc=5, l=<optimized out>) at dl-init.c:30
        init_array = <optimized out>
        j = <optimized out>
        jm = <optimized out>
        addrs = <optimized out>
#8  _dl_init (main_map=0x1918190, argc=5, argv=0x7fff106aae38, env=0x168fd50) 
at dl-init.c:119
        preinit_array = <optimized out>
        preinit_array_size = <optimized out>
        i = <optimized out>
#9  0x00007fea575a2aed in __GI__dl_catch_exception 
(exception=exception@entry=0x0, operate=operate@entry=0x7fea6b8335d0 
<call_dl_init>, args=args@entry=0x7fff106a1cd0)
    at dl-error-skeleton.c:182
        old = <optimized out>
        errcode = 0
        c = \{exception = 0x7fff106a1c30, errcode = 0x0, env = {{__jmpbuf = 
{140733468777520, 0, 0, 140643321125720, 26313976, 140643321198124, 
140643321095744, 140643323642840},
              __mask_was_saved = 322015232, __saved_mask = {__val = {0, 
140733468777616, 140644478215584, 0, 0, 0, 0, 0, 0, 0, 0, 12468370135039750697, 
140733468778096, 140733468777584,
                  140733468778096, 140733468777760}}}}}
        old = <optimized out>
#10 0x00007fea6b834058 in dl_open_worker (a=a@entry=0x7fff106a1e70) at 
dl-open.c:758
        init_args = \{new = 0x1918190, argc = 5, argv = 0x7fff106aae38, env = 
0x168fd50}
        args = 0x7fff106a1e70
        file = <optimized out>
        mode = <optimized out>
        call_map = <optimized out>
        dst = <optimized out>
        new = 0x1918190
        __PRETTY_FUNCTION__ = "dl_open_worker"
        r = <optimized out>
--Type <RET> for more, q to quit, c to continue without paging--
        reloc_mode = <optimized out>
        nmaps = <optimized out>
        l = <optimized out>
        maps = <error reading variable maps (value requires 138793856 bytes, 
which is more than max-value-size)>
        relocation_in_progress = <optimized out>
        any_tls = <optimized out>
#11 0x00007fea575a2a90 in __GI__dl_catch_exception 
(exception=exception@entry=0x7fff106a1e50, operate=operate@entry=0x7fea6b833ca0 
<dl_open_worker>, args=args@entry=0x7fff106a1e70)
    at dl-error-skeleton.c:208
        errcode = 0
        c = \{exception = 0x7fff106a1e50, errcode = 0x7fff106a1d5c, env = 
{{__jmpbuf = {2147483650, 1061564265845182786, -74376, 5, 5369100, -2, 
1049880826869928258, 1061551455913726274},
              __mask_was_saved = 0, __saved_mask = {__val = {140644403015840, 
140644403015840, 4506233, 140644402510488, 15, 140644402510432, 
140644403015888, 140733468778048,
                  140733468778080, 140733468779105, 10865718445837529600, 
140733468778848, 0, 257, 140733468778080, 6671076}}}}}
        old = 0x7fff106a1f40
#12 0x00007fea6b8338fa in _dl_open (file=0x7fea5165efc0 
"/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/lib.cpython-310-x86_64-linux-gnu.so",
    mode=-2147483646, caller_dlopen=0x51ed0c <_PyImport_FindSharedFuncptr+284>, 
nsid=-2, argc=5, argv=0x7fff106a1e50, env=0x168fd50) at dl-open.c:837
        args = {file = 0x7fea5165efc0 
"/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/lib.cpython-310-x86_64-linux-gnu.so",
          mode = -2147483646, caller_dlopen = 0x51ed0c 
<_PyImport_FindSharedFuncptr+284>, map = 0x1918190, nsid = 0, 
original_global_scope_pending_adds = 0, argc = 5,
          argv = 0x7fff106aae38, env = 0x168fd50}
        exception = {objname = 0x439830 <list_richcompare> 
"UAWAVAUATSPH\213G\b\366\200\253", errstring = 0x7fff106a1f50 "8Y\b\001",
          message_buffer = 0xfbad8001 <error: Cannot access memory at address 
0xfbad8001>}
        errcode = <optimized out>
        __PRETTY_FUNCTION__ = "_dl_open"
#13 0x00007fea5778d258 in dlopen_doit (a=a@entry=0x7fff106a2090) at dlopen.c:66
        args = 0x7fff106a2090
#14 0x00007fea575a2a90 in __GI__dl_catch_exception 
(exception=exception@entry=0x7fff106a2030, operate=operate@entry=0x7fea5778d200 
<dlopen_doit>, args=args@entry=0x7fff106a2090)
    at dl-error-skeleton.c:208
        errcode = 32746
        c = {exception = 0x7fff106a2030, errcode = 0x7fff106a1f3c, env = 
{{__jmpbuf = {17324344, -1049391729601195710, -74376, 140644364656960, 
140644364656832, 140644364709824,
                1049880826807013698, 1061551455913726274}, __mask_was_saved = 
0, __saved_mask = {__val = {10865718445837529600, 9223372036854775807, 258, 0, 
0, 140644364656960,
                  140733468778848, 140644364709824, 5216203, 206158430248, 
140733468778704, 140733468778496, 140644402549736, 140644402549736, 2, 
140644402612032}}}}}
        old = 0x0
#15 0x00007fea575a2b4f in __GI__dl_catch_error 
(objname=objname@entry=0x1085940, errstring=errstring@entry=0x1085948, 
mallocedp=mallocedp@entry=0x1085938,
    operate=operate@entry=0x7fea5778d200 <dlopen_doit>, 
args=args@entry=0x7fff106a2090) at dl-error-skeleton.c:227
        exception = \{objname = 0x0, errstring = 0x2 <error: Cannot access 
memory at address 0x2>, message_buffer = 0x1 <error: Cannot access memory at 
address 0x1>}
        errorcode = <optimized out>
#16 0x00007fea5778da65 in _dlerror_run (operate=operate@entry=0x7fea5778d200 
<dlopen_doit>, args=args@entry=0x7fff106a2090) at dlerror.c:170
        result = 0x1085930
#17 0x00007fea5778d2e4 in __dlopen (file=<optimized out>, mode=<optimized out>) 
at dlopen.c:87
        args = {file = 0x7fea5165efc0 
"/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/lib.cpython-310-x86_64-linux-gnu.so",
 mode = 2,
          new = 0x11f6700, caller = 0x51ed0c <_PyImport_FindSharedFuncptr+284>}
#18 0x000000000051ed0c in _PyImport_FindSharedFuncptr (prefix=0x64fb3d 
"PyInit", shortname=0x7fea516520c0 "lib",
    pathname=0x7fea5165efc0 
"/root/.cache/pypoetry/virtualenvs/<redated>-sOknH4PM-py3.10/lib/python3.10/site-packages/pyarrow/lib.cpython-310-x86_64-linux-gnu.so",
 fp=0x0)
    at ./Python/dynload_shlib.c:100
        funcname = "PyInit_lib", '\000' <repeats 22 times>, 
"\320\315qR\352\177\000\000\000\000\000\000\000\000\000\000\001\000\000\000\000\000\000\000\001\000\000\000\000\000\000\000\001\000\000\000\001",
 '\000' <repeats 43 times>, 
"O\373d\000\000\000\000\000\000g\037\001\000\000\000\000\200sfQ\352\177\000\000P\"j\020\377\177\000\000\002\000\000\000\000\000\000\000P\"j\020\377\177\000\000\000\000\000\000\000\000\000\000V\357Y\000\000\000\000\000\240\356Y\000\000\000\000\000\240
 eQ\352\177\000\000\070\067hQ\352\177\000\000"...
        pathbuf = 
"\002\000\000\000\000\000\000\000\264\212\035\305yz\306d\000\021\260S\352\177\000\000\236\272D\000\000\000\000\000\230\272\246S\352\177\000\000\000\000\000\000\000\000\000\000p\036hQ\352\177\000\000@!eQ\352\177\000\000p;xQ\352\177\000\000\240
 
eQ\352\177\000\000\000\000\000\000\000\000\000\000\023\305P\000\000\000\000\000\020\000\000\000\060\000\000\000\260#j\0
20\377\177\000\000\360\"j\020\377\177\000\000@!eQ\352\177\000\000\000\000\000\000\000\000\000\000Q\274D\000\000\000\000\000p\036hQ\352\177\000\000p;xQ\352\177\000\000\340\251p\000\000\000\000\000\340\251p\000\000\000\000\000\360\071j\000\000\000\000\000\003",
 '\000' <repeats 15 times>...
        dlopenflags = 1799967928
        handle = <optimized out>
        p = <optimized out>
#19 0x00000000004eaa4e in _PyImport_LoadDynamicModuleWithSpec 
(spec=0x7fea51652140, fp=0x0) at ./Python/importdl.c:137
        m = 0x0
        path = <optimized out>
        name = 0x7fea516520a0
        name_unicode = 0x7fea51681e70
        pathbytes = 0x7fea5165efa0
        hook_prefix = 0x64fb3d "PyInit"
        name_buf = 0x7fea516520c0 "lib"
        exportfunc = <optimized out>
        p0 = <optimized out>
        oldcontext = <optimized out>
        def = <optimized out>
        modules = <optimized out>
```
It is different with previously core dump, but I have no idea how this happens 
now. And the behavior is pretty consistent, if I unset the `ARROW_IO_THREADS` 
env var and run the program again, the previous core dump will be generated 
again.


I don't know how to proceed any more. Basically:

1) I create a C++ library with arrow C++ library

2) I create a python binding for the C++ library using pybind

3) Instead of importing pyarrow.h header, I now import <arrow/c/abi.h> and 
<arrow/c/bridge.h> for briding

4) In my python program, I use both my python binding and pyarrow wheel

Do you think if this kind usage is supported or if it is some bug for arrow 
project?

> [C++][Python] Move all Python related code into PyArrow
> -------------------------------------------------------
>
>                 Key: ARROW-16340
>                 URL: https://issues.apache.org/jira/browse/ARROW-16340
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++, Python
>            Reporter: Alenka Frim
>            Assignee: Alenka Frim
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 10.0.0
>
>          Time Spent: 33h 10m
>  Remaining Estimate: 0h
>
> Move {{src/arrow/python}} directory into {{pyarrow}} and arrange PyArrow to 
> build it.
> More details can be found on this thread:
> https://lists.apache.org/thread/jbxyldhqff4p9z53whhs95y4jcomdgd2



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