Hi!

I've been complaining about the new (and old) python bindings causing the python interpreter to segfault occasionally. So far I was not able to reproduce this reliably nor provide error traces. This has just changed:
see below and attached for what I got from gdb.

I hope that whoever is in charge of the bindings can make sense of it. I don't have any experience so far with cffi nor gdb and have a hard time debugging this. The logs below are my attempt to collect as much detail as possible about. Please let me know if I missed something.

Cheers!
P



----------------------------------

(gdb) bt

... see attachment bt 

----------------------------------

Some context?

(gdb) up
#1  0x00007ffff7c36537 in __GI_abort () at abort.c:79
79	abort.c: No such file or directory.

(gdb) up
#2  0x00007ffff66b5551 in ?? () from /usr/lib/x86_64-linux-gnu/libtalloc.so.2

(gdb) up
#3  0x00007ffff66c7a6b in _cffi_f_notmuch_thread_destroy (self=<optimized out>, 
    arg0=<optimized out>) at build/temp.linux-x86_64-3.8/notmuch2._capi.c:4826
4826	build/temp.linux-x86_64-3.8/notmuch2._capi.c: No such file or directory.

(gdb) up
#4  0x0000000000519b0b in cfunction_vectorcall_O (
    func=<built-in method notmuch_thread_destroy of CompiledLib object at remote 0x7ffff636f040>, args=<optimized out>, nargsf=<optimized out>, kwnames=<optimized out>)
    at ../Objects/methodobject.c:482
482	../Objects/methodobject.c: No such file or directory.

(gdb) up
#5  0x000000000050a557 in _PyObject_Vectorcall (kwnames=0x0, nargsf=<optimized out>, 
    args=0x7ffff4aa4ec0, 
    callable=<built-in method notmuch_thread_destroy of CompiledLib object at remote 0x7ffff636f040>) at ../Include/cpython/abstract.h:127
127	../Include/cpython/abstract.h: No such file or directory.

(gdb) up
#6  call_function (kwnames=0x0, oparg=<optimized out>, pp_stack=<synthetic pointer>, 
    tstate=0x9241a0) at ../Python/ceval.c:4963
4963	../Python/ceval.c: No such file or directory.

(gdb) up
#7  _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>)
    at ../Python/ceval.c:3469
3469	in ../Python/ceval.c

(gdb) up
#8  0x000000000051ad20 in PyEval_EvalFrameEx (throwflag=0, 
    f=Frame 0x7ffff4aa4d40, for file /home/pazz/.local/lib/python3.8/site-packages/notmuch2/_thread.py, line 38, in _destroy (self=<Thread(_parent=<ThreadIter(_db=<Database(mode=<Mode(_value_=0, _name_='READ_ONLY', __objclass__=<EnumMeta(_generate_next_value_=<function at remote 0x7ffff76a9ee0>, __module__='notmuch2._database', __doc__='An enumeration.', _member_names_=['READ_ONLY', 'READ_WRITE'], _member_map_={'READ_ONLY': <...>, 'READ_WRITE': <Mode(_value_=1, _name_='READ_WRITE', __objclass__=<...>) at remote 0x7ffff5480a30>}, _member_type_=<type at remote 0x8c8440>, _value2member_map_={0: <...>, 1: <...>}, READ_ONLY=<...>, READ_WRITE=<...>, __new__=<function at remote 0x7ffff76a9e50>) at remote 0xd59c20>) at remote 0x7ffff6380760>, _memptr__db_p_d5c090=<_cffi_backend.CData at remote 0x7ffff4afd930>, closed=False) at remote 0x7ffff4afd5b0>, _parent=<Query(_db=<...>, _memptr__query_p_d591c0=<_cffi_backend.CData at remote 0x7ffff4afdae0>) at remote 0x7ffff4afd9a0>, _memptr__iter_p_d4a9d0=<_cffi_backend.CData at rem...(truncated)) at ../Python/ceval.c:741
741	../Python/ceval.c: No such file or directory.

(gdb) up
#9  function_code_fastcall (globals=<optimized out>, nargs=1, args=<optimized out>, 
    co=<optimized out>) at ../Objects/call.c:283
283	../Objects/call.c: No such file or directory.

(gdb) up
#10 _PyFunction_Vectorcall (func=<optimized out>, stack=<optimized out>, 
    nargsf=<optimized out>, kwnames=<optimized out>) at ../Objects/call.c:410
410	in ../Objects/call.c

(gdb) up
#11 0x0000000000505a6c in _PyObject_Vectorcall (kwnames=0x0, nargsf=<optimized out>, 
    args=0x7ffff4aa4d18, callable=<function at remote 0x7ffff638b550>)
    at ../Include/cpython/abstract.h:127
127	../Include/cpython/abstract.h: No such file or directory.

(gdb) up
#12 call_function (kwnames=0x0, oparg=<optimized out>, pp_stack=<synthetic pointer>, 
    tstate=0x9241a0) at ../Python/ceval.c:4963
4963	../Python/ceval.c: No such file or directory.

(gdb) up
#13 _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>)
    at ../Python/ceval.c:3486
3486	in ../Python/ceval.c

(gdb) up
#14 0x000000000051ad20 in PyEval_EvalFrameEx (throwflag=0, 
    f=Frame 0x7ffff4aa4ba0, for file /home/pazz/.local/lib/python3.8/site-packages/notmuch2/_thread.py, line 34, in __del__ (self=<Thread(_parent=<ThreadIter(_db=<Database(mode=<Mode(_value_=0, _name_='READ_ONLY', __objclass__=<EnumMeta(_generate_next_value_=<function at remote 0x7ffff76a9ee0>, __module__='notmuch2._database', __doc__='An enumeration.', _member_names_=['READ_ONLY', 'READ_WRITE'], _member_map_={'READ_ONLY': <...>, 'READ_WRITE': <Mode(_value_=1, _name_='READ_WRITE', __objclass__=<...>) at remote 0x7ffff5480a30>}, _member_type_=<type at remote 0x8c8440>, _value2member_map_={0: <...>, 1: <...>}, READ_ONLY=<...>, READ_WRITE=<...>, __new__=<function at remote 0x7ffff76a9e50>) at remote 0xd59c20>) at remote 0x7ffff6380760>, _memptr__db_p_d5c090=<_cffi_backend.CData at remote 0x7ffff4afd930>, closed=False) at remote 0x7ffff4afd5b0>, _parent=<Query(_db=<...>, _memptr__query_p_d591c0=<_cffi_backend.CData at remote 0x7ffff4afdae0>) at remote 0x7ffff4afd9a0>, _memptr__iter_p_d4a9d0=<_cffi_backend.CData at remo...(truncated)) at ../Python/ceval.c:741
741	../Python/ceval.c: No such file or directory.


----------------------------------
(gdb) frame
#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
50	in ../sysdeps/unix/sysv/linux/raise.c

----------------------------------


(gdb) info-signals

... see attachment info-signals


----------------------------------

(gdb) py-bt

... see attachment py-bt

----------------------------------

(gdb) py-print
Unable to read information on python frame


----------------------------------

(gdb) py-locals
Unable to read information on python frame


----------------------------------

(gdb) info threads
  Id   Target Id                                     Frame 
* 1    Thread 0x7ffff7c0e740 (LWP 3614451) "python3" __GI_raise (sig=sig@entry=6)
    at ../sysdeps/unix/sysv/linux/raise.c:50