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test_asyncio.test_free_threading.TestCFreeThreading.test_all_tasks_race crashes intermittently in free-threaded builds #128656

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mpage opened this issue Jan 9, 2025 · 1 comment · Fixed by #128541
Closed

test_asyncio.test_free_threading.TestCFreeThreading.test_all_tasks_race crashes intermittently in free-threaded builds #128656

mpage opened this issue Jan 9, 2025 · 1 comment · Fixed by #128541
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tests Tests in the Lib/test dir topic-asyncio topic-free-threading type-crash A hard crash of the interpreter, possibly with a core dump

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@mpage
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mpage commented Jan 9, 2025 •
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Crash report

What happened?

test_asyncio.test_free_threading.TestCFreeThreading.test_all_tasks_race crashes intermittently in free-threaded builds. The crash is reproducible by running the test repeatedly:

> ./python -m test test_asyncio.test_free_threading --match test.test_asyncio.test_free_threading.TestCFreeThreading.test_all_tasks_race -F
Using random seed: 1718500416
0:00:00 load avg: 0.85 Run tests sequentially in a single process
0:00:00 load avg: 0.85 [  1] test_asyncio.test_free_threading
0:00:00 load avg: 0.85 [  2] test_asyncio.test_free_threading
0:00:00 load avg: 0.85 [  3] test_asyncio.test_free_threading
0:00:00 load avg: 0.85 [  4] test_asyncio.test_free_threading
0:00:00 load avg: 0.85 [  5] test_asyncio.test_free_threading
0:00:00 load avg: 0.85 [  6] test_asyncio.test_free_threading
0:00:00 load avg: 0.85 [  7] test_asyncio.test_free_threading
0:00:00 load avg: 0.85 [  8] test_asyncio.test_free_threading
0:00:00 load avg: 0.85 [  9] test_asyncio.test_free_threading
0:00:00 load avg: 0.85 [ 10] test_asyncio.test_free_threading
0:00:00 load avg: 0.85 [ 11] test_asyncio.test_free_threading
0:00:00 load avg: 0.85 [ 12] test_asyncio.test_free_threading
0:00:01 load avg: 0.85 [ 13] test_asyncio.test_free_threading
0:00:01 load avg: 0.85 [ 14] test_asyncio.test_free_threading
0:00:01 load avg: 0.85 [ 15] test_asyncio.test_free_threading
0:00:01 load avg: 0.85 [ 16] test_asyncio.test_free_threading
Objects/object.c:578: PyObject_CallFinalizerFromDealloc: Assertion failed: PyObject_CallFinalizerFromDealloc called on object with a non-zero refcount
Enable tracemalloc to get the memory block allocation traceback

object address  : 0x200142d6020
object refcount : 1
object type     : 0x200015ecd10
object type name: _asyncio.Task
object repr     : <Task finished name='None' coro=<TestFreeThreading.test_all_tasks_race.<locals>.main.<locals>.coro() done, defined at /data/users/mpage/cpython/Lib/test/test_asyncio/test_free_threading.py:20> result=None>

Fatal Python error: _PyObject_AssertFailed: _PyObject_AssertFailed
Python runtime state: initialized

Thread 0x00007fbb97400640 (most recent call first):
  File "/data/users/mpage/cpython/Lib/test/test_asyncio/test_free_threading.py", line 21 in coro

Thread 0x00007fbb97e00640 (most recent call first):
  File "/data/users/mpage/cpython/Lib/asyncio/runners.py", line 208 in _cancel_all_tasks
  File "/data/users/mpage/cpython/Lib/asyncio/runners.py", line 71 in close
  File "/data/users/mpage/cpython/Lib/asyncio/runners.py", line 63 in __exit__
  File "/data/users/mpage/cpython/Lib/test/test_asyncio/test_free_threading.py", line 42 in runner
  File "/data/users/mpage/cpython/Lib/threading.py", line 996 in run
  File "/data/users/mpage/cpython/Lib/threading.py", line 1054 in _bootstrap_inner
  File "/data/users/mpage/cpython/Lib/threading.py", line 1016 in _bootstrap

Thread 0x00007fbb9ca00640 (most recent call first):
  File "/data/users/mpage/cpython/Lib/asyncio/runners.py", line 208 in _cancel_all_tasks
  File "/data/users/mpage/cpython/Lib/asyncio/runners.py", line 71 in close
  File "/data/users/mpage/cpython/Lib/asyncio/runners.py", line 63 in __exit__
  File "/data/users/mpage/cpython/Lib/test/test_asyncio/test_free_threading.py", line 42 in runner
  File "/data/users/mpage/cpython/Lib/threading.py", line 996 in run
  File "/data/users/mpage/cpython/Lib/threading.py", line 1054 in _bootstrap_inner
  File "/data/users/mpage/cpython/Lib/threading.py", line 1016 in _bootstrap

Thread 0x00007fbb9d400640 (most recent call first):
  File "/data/users/mpage/cpython/Lib/asyncio/events.py", line 98 in _run
  File "/data/users/mpage/cpython/Lib/asyncio/base_events.py", line 2026 in _run_once
  File "/data/users/mpage/cpython/Lib/asyncio/base_events.py", line 683 in run_forever
  File "/data/users/mpage/cpython/Lib/asyncio/base_events.py", line 712 in run_until_complete
  File "/data/users/mpage/cpython/Lib/asyncio/runners.py", line 127 in run
  File "/data/users/mpage/cpython/Lib/test/test_asyncio/test_free_threading.py", line 45 in runner
  File "/data/users/mpage/cpython/Lib/threading.py", line 996 in run
  File "/data/users/mpage/cpython/Lib/threading.py", line 1054 in _bootstrap_inner
  File "/data/users/mpage/cpython/Lib/threading.py", line 1016 in _bootstrap

Current thread 0x00007fbb9de00640 (most recent call first):
  File "/data/users/mpage/cpython/Lib/asyncio/events.py", line 98 in _run
  File "/data/users/mpage/cpython/Lib/asyncio/base_events.py", line 2041 in _run_once
  File "/data/users/mpage/cpython/Lib/asyncio/base_events.py", line 683 in run_forever
  File "/data/users/mpage/cpython/Lib/asyncio/base_events.py", line 712 in run_until_complete
  File "/data/users/mpage/cpython/Lib/asyncio/runners.py", line 127 in run
  File "/data/users/mpage/cpython/Lib/test/test_asyncio/test_free_threading.py", line 45 in runner
  File "/data/users/mpage/cpython/Lib/threading.py", line 996 in run
  File "/data/users/mpage/cpython/Lib/threading.py", line 1054 in _bootstrap_inner
  File "/data/users/mpage/cpython/Lib/threading.py", line 1016 in _bootstrap

Thread 0x00007fbb9e800640 (most recent call first):
  File "/data/users/mpage/cpython/Lib/asyncio/base_events.py", line 2041 in _run_once
  File "/data/users/mpage/cpython/Lib/asyncio/base_events.py", line 683 in run_forever
  File "/data/users/mpage/cpython/Lib/asyncio/base_events.py", line 712 in run_until_complete
  File "/data/users/mpage/cpython/Lib/asyncio/runners.py", line 127 in run
  File "/data/users/mpage/cpython/Lib/test/test_asyncio/test_free_threading.py", line 45 in runner
  File "/data/users/mpage/cpython/Lib/threading.py", line 996 in run
  File "/data/users/mpage/cpython/Lib/threading.py", line 1054 in _bootstrap_inner
  File "/data/users/mpage/cpython/Lib/threading.py", line 1016 in _bootstrap

Thread 0x00007fbb96000640 (most recent call first):
  File "/data/users/mpage/cpython/Lib/asyncio/runners.py", line 208 in _cancel_all_tasks
  File "/data/users/mpage/cpython/Lib/asyncio/runners.py", line 71 in close
  File "/data/users/mpage/cpython/Lib/asyncio/runners.py", line 63 in __exit__
  File "/data/users/mpage/cpython/Lib/test/test_asyncio/test_free_threading.py", line 42 in runner
  File "/data/users/mpage/cpython/Lib/threading.py", line 996 in run
  File "/data/users/mpage/cpython/Lib/threading.py", line 1054 in _bootstrap_inner
  File "/data/users/mpage/cpython/Lib/threading.py", line 1016 in _bootstrap

Thread 0x00007fbb94c00640 (most recent call first):
  <no Python frame>

Thread 0x00007fbb9f463740 (most recent call first):
  File "/data/users/mpage/cpython/Lib/threading.py", line 1105 in join
  File "/data/users/mpage/cpython/Lib/test/support/threading_helper.py", line 147 in start_threads
  File "/data/users/mpage/cpython/Lib/contextlib.py", line 148 in __exit__
  File "/data/users/mpage/cpython/Lib/test/test_asyncio/test_free_threading.py", line 53 in test_all_tasks_race
  File "/data/users/mpage/cpython/Lib/unittest/case.py", line 606 in _callTestMethod
  File "/data/users/mpage/cpython/Lib/unittest/case.py", line 660 in run
  File "/data/users/mpage/cpython/Lib/unittest/case.py", line 716 in __call__
  File "/data/users/mpage/cpython/Lib/unittest/suite.py", line 122 in run
  File "/data/users/mpage/cpython/Lib/unittest/suite.py", line 84 in __call__
  File "/data/users/mpage/cpython/Lib/unittest/suite.py", line 122 in run
  File "/data/users/mpage/cpython/Lib/unittest/suite.py", line 84 in __call__
  File "/data/users/mpage/cpython/Lib/test/libregrtest/testresult.py", line 148 in run
  File "/data/users/mpage/cpython/Lib/test/libregrtest/single.py", line 58 in _run_suite
  File "/data/users/mpage/cpython/Lib/test/libregrtest/single.py", line 38 in run_unittest
  File "/data/users/mpage/cpython/Lib/test/libregrtest/single.py", line 136 in test_func
  File "/data/users/mpage/cpython/Lib/test/libregrtest/single.py", line 92 in regrtest_runner
  File "/data/users/mpage/cpython/Lib/test/libregrtest/single.py", line 139 in _load_run_test
  File "/data/users/mpage/cpython/Lib/test/libregrtest/single.py", line 184 in _runtest_env_changed_exc
  File "/data/users/mpage/cpython/Lib/test/libregrtest/single.py", line 284 in _runtest
  File "/data/users/mpage/cpython/Lib/test/libregrtest/single.py", line 313 in run_single_test
  File "/data/users/mpage/cpython/Lib/test/libregrtest/main.py", line 372 in run_test
  File "/data/users/mpage/cpython/Lib/test/libregrtest/main.py", line 406 in run_tests_sequentially
  File "/data/users/mpage/cpython/Lib/test/libregrtest/main.py", line 552 in _run_tests
  File "/data/users/mpage/cpython/Lib/test/libregrtest/main.py", line 587 in run_tests
  File "/data/users/mpage/cpython/Lib/test/libregrtest/main.py", line 759 in main
  File "/data/users/mpage/cpython/Lib/test/libregrtest/main.py", line 767 in main
  File "/data/users/mpage/cpython/Lib/test/__main__.py", line 2 in <module>
  File "/data/users/mpage/cpython/Lib/runpy.py", line 88 in _run_code
  File "/data/users/mpage/cpython/Lib/runpy.py", line 198 in _run_module_as_main
Aborted (core dumped)
>

Here is the C stack trace:

(gdb) bt
#0  0x00007fbb9f28bacc in __pthread_kill_implementation () from /lib64/libc.so.6
#1  0x00007fbb9f23e686 in raise () from /lib64/libc.so.6
#2  0x00007fbb9f228833 in abort () from /lib64/libc.so.6
#3  0x00000000006f8605 in fatal_error_exit (status=<optimized out>) at Python/pylifecycle.c:3154
#4  0x00000000007037ec in fatal_error (fd=2, header=header@entry=1, prefix=prefix@entry=0x812aa0 <__func__.6> "_PyObject_AssertFailed", msg=msg@entry=0x81284f "_PyObject_AssertFailed", status=status@entry=-1)
    at Python/pylifecycle.c:3370
#5  0x0000000000703856 in _Py_FatalErrorFunc (func=func@entry=0x812aa0 <__func__.6> "_PyObject_AssertFailed", msg=msg@entry=0x81284f "_PyObject_AssertFailed") at Python/pylifecycle.c:3386
#6  0x0000000000539c83 in _PyObject_AssertFailed (obj=obj@entry=<_asyncio.Task() at remote 0x200142d6020>, expr=expr@entry=0x0,
    msg=msg@entry=0x8121a0 "PyObject_CallFinalizerFromDealloc called on object with a non-zero refcount", file=file@entry=0x812637 "Objects/object.c", line=line@entry=578,
    function=function@entry=0x812ee0 <__func__.46> "PyObject_CallFinalizerFromDealloc") at Objects/object.c:2968
#7  0x000000000053b106 in PyObject_CallFinalizerFromDealloc (self=self@entry=<_asyncio.Task() at remote 0x200142d6020>) at Objects/object.c:578
#8  0x00007fbb9efd6ed9 in TaskObj_dealloc (self=<_asyncio.Task() at remote 0x200142d6020>) at ./Modules/_asynciomodule.c:2818
#9  0x0000000000539423 in _Py_Dealloc (op=<_asyncio.Task() at remote 0x200142d6020>) at Objects/object.c:2991
#10 0x0000000000539598 in _Py_MergeZeroLocalRefcount (op=op@entry=<_asyncio.Task() at remote 0x200142d6020>) at Objects/object.c:436
#11 0x000000000055f43e in Py_DECREF (op=<_asyncio.Task() at remote 0x200142d6020>, lineno=511, filename=0x81c6e5 "Objects/setobject.c") at ./Include/refcount.h:343
#12 set_dealloc (
    self={<_asyncio.Task() at remote 0x200142d2020>, <_asyncio.Task() at remote 0x200142d4020>, <_asyncio.Task() at remote 0x200142d6020>, <_asyncio.Task() at remote 0x200142d2120>, <_asyncio.Task() at remote 0x200142d4120>, <_asyncio.Task() at remote 0x200142d6120>, <_asyncio.Task() at remote 0x200142d0220>, <_asyncio.Task() at remote 0x200142d2220>, <_asyncio.Task() at remote 0x200142d4220>, <_asyncio.Task() at remote 0x200142d6220>, <_asyncio.Task() at remote 0x200142d0320>, <_asyncio.Task() at remote 0x200142d2320>, <_asyncio.Task() at remote 0x200142d4320>, <_asyncio.Task() at remote 0x200142d6320>, <_asyncio.Task() at remote 0x200142d0420>, <_asyncio.Task() at remote 0x200142d2420>, <_asyncio.Task() at remote 0x200142d4420>, <_asyncio.Task() at remote 0x200142d6420>, <_asyncio.Task() at remote 0x200142d0520>, <_asyncio.Task() at remote 0x200142d2520>, <_asyncio.Task() at remote 0x200142d4520>, <_asyncio.Task() at remote 0x200142d6520>, <_asyncio.Task() at remote 0x200142d0620>, <_asyncio.Task() at remote 0x20014...(truncated)) at Objects/setobject.c:511
#13 0x0000000000539423 in _Py_Dealloc (
    op={<_asyncio.Task() at remote 0x200142d2020>, <_asyncio.Task() at remote 0x200142d4020>, <_asyncio.Task() at remote 0x200142d6020>, <_asyncio.Task() at remote 0x200142d2120>, <_asyncio.Task() at remote 0x200142d4120>, <_asyncio.Task() at remote 0x200142d6120>, <_asyncio.Task() at remote 0x200142d0220>, <_asyncio.Task() at remote 0x200142d2220>, <_asyncio.Task() at remote 0x200142d4220>, <_asyncio.Task() at remote 0x200142d6220>, <_asyncio.Task() at remote 0x200142d0320>, <_asyncio.Task() at remote 0x200142d2320>, <_asyncio.Task() at remote 0x200142d4320>, <_asyncio.Task() at remote 0x200142d6320>, <_asyncio.Task() at remote 0x200142d0420>, <_asyncio.Task() at remote 0x200142d2420>, <_asyncio.Task() at remote 0x200142d4420>, <_asyncio.Task() at remote 0x200142d6420>, <_asyncio.Task() at remote 0x200142d0520>, <_asyncio.Task() at remote 0x200142d2520>, <_asyncio.Task() at remote 0x200142d4520>, <_asyncio.Task() at remote 0x200142d6520>, <_asyncio.Task() at remote 0x200142d0620>, <_asyncio.Task() at remote 0x20014...(truncated)) at Objects/object.c:2991
#14 0x0000000000539598 in _Py_MergeZeroLocalRefcount (
    op=op@entry={<_asyncio.Task() at remote 0x200142d2020>, <_asyncio.Task() at remote 0x200142d4020>, <_asyncio.Task() at remote 0x200142d6020>, <_asyncio.Task() at remote 0x200142d2120>, <_asyncio.Task() at remote 0x200142d4120>, <_asyncio.Task() at remote 0x200142d6120>, <_asyncio.Task() at remote 0x200142d0220>, <_asyncio.Task() at remote 0x200142d2220>, <_asyncio.Task() at remote 0x200142d4220>, <_asyncio.Task() at remote 0x200142d6220>, <_asyncio.Task() at remote 0x200142d0320>, <_asyncio.Task() at remote 0x200142d2320>, <_asyncio.Task() at remote 0x200142d4320>, <_asyncio.Task() at remote 0x200142d6320>, <_asyncio.Task() at remote 0x200142d0420>, <_asyncio.Task() at remote 0x200142d2420>, <_asyncio.Task() at remote 0x200142d4420>, <_asyncio.Task() at remote 0x200142d6420>, <_asyncio.Task() at remote 0x200142d0520>, <_asyncio.Task() at remote 0x200142d2520>, <_asyncio.Task() at remote 0x200142d4520>, <_asyncio.Task() at remote 0x200142d6520>, <_asyncio.Task() at remote 0x200142d0620>, <_asyncio.Task() at remote 0x20014...(truncated)) at Objects/object.c:436
#15 0x00000000006b766f in Py_DECREF (
    op={<_asyncio.Task() at remote 0x200142d2020>, <_asyncio.Task() at remote 0x200142d4020>, <_asyncio.Task() at remote 0x200142d6020>, <_asyncio.Task() at remote 0x200142d2120>, <_asyncio.Task() at remote 0x200142d4120>, <_asyncio.Task() at remote 0x200142d6120>, <_asyncio.Task() at remote 0x200142d0220>, <_asyncio.Task() at remote 0x200142d2220>, <_asyncio.Task() at remote 0x200142d4220>, <_asyncio.Task() at remote 0x200142d6220>, <_asyncio.Task() at remote 0x200142d0320>, <_asyncio.Task() at remote 0x200142d2320>, <_asyncio.Task() at remote 0x200142d4320>, <_asyncio.Task() at remote 0x200142d6320>, <_asyncio.Task() at remote 0x200142d0420>, <_asyncio.Task() at remote 0x200142d2420>, <_asyncio.Task() at remote 0x200142d4420>, <_asyncio.Task() at remote 0x200142d6420>, <_asyncio.Task() at remote 0x200142d0520>, <_asyncio.Task() at remote 0x200142d2520>, <_asyncio.Task() at remote 0x200142d4520>, <_asyncio.Task() at remote 0x200142d6520>, <_asyncio.Task() at remote 0x200142d0620>, <_asyncio.Task() at remote 0x20014...(truncated), lineno=99, filename=0x8802a0 "Python/frame.c")
    at ./Include/refcount.h:343
#16 _PyFrame_ClearLocals (frame=frame@entry=0x200142001e8) at Python/frame.c:99
#17 0x00000000006b78e6 in _PyFrame_ClearExceptCode (frame=frame@entry=0x200142001e8) at Python/frame.c:124
#18 0x000000000064dab3 in clear_gen_frame (tstate=0xb5fb30, frame=0x200142001e8) at Python/ceval.c:1750
#19 0x0000000000651f66 in _PyEval_FrameClearAndPop (tstate=tstate@entry=0xb5fb30, frame=frame@entry=0x200142001e8) at Python/ceval.c:1763
#20 0x000000000067a993 in _PyEval_EvalFrameDefault (tstate=tstate@entry=0xb5fb30, frame=0x7fbb9ddff4f0, frame@entry=0x200142001e8, throwflag=throwflag@entry=0) at Python/generated_cases.c.h:7103
#21 0x00000000004e1144 in _PyEval_EvalFrame (throwflag=0, frame=0x200142001e8, tstate=0xb5fb30) at ./Include/internal/pycore_ceval.h:116
#22 gen_send_ex2 (gen=0x20014200190, arg=None, presult=0x7fbb9ddff658, exc=exc@entry=0, closing=closing@entry=0) at Objects/genobject.c:245
#23 0x00000000004e1311 in PyGen_am_send (self=<optimized out>, arg=<optimized out>, result=<optimized out>) at Objects/genobject.c:280
#24 0x0000000000492d54 in PyIter_Send (iter=iter@entry=<coroutine at remote 0x20014200190>, arg=None, result=result@entry=0x7fbb9ddff658) at Objects/abstract.c:2927
#25 0x00007fbb9efdd157 in task_step_impl (state=state@entry=0x20000591eb0, task=task@entry=0x200142d0120, exc=exc@entry=0x0) at ./Modules/_asynciomodule.c:2942
#26 0x00007fbb9efde105 in task_step (state=state@entry=0x20000591eb0, task=task@entry=0x200142d0120, exc=exc@entry=0x0) at ./Modules/_asynciomodule.c:3265
#27 0x00007fbb9efde536 in task_wakeup_lock_held (task=task@entry=0x200142d0120, o=o@entry=<_asyncio.Future() at remote 0x200142e0260>) at ./Modules/_asynciomodule.c:3365
#28 0x00007fbb9efde635 in task_wakeup (task=0x200142d0120, o=<_asyncio.Future() at remote 0x200142e0260>) at ./Modules/_asynciomodule.c:3397
#29 0x0000000000532a6f in cfunction_vectorcall_O (func=<built-in method task_wakeup of _asyncio.Task object at remote 0x200142d0120>, args=<optimized out>, nargsf=<optimized out>, kwnames=<optimized out>)
    at ./Include/cpython/methodobject.h:50
#30 0x00000000006a3456 in _PyObject_VectorcallTstate (tstate=tstate@entry=0xb5fb30, callable=<built-in method task_wakeup of _asyncio.Task object at remote 0x200142d0120>, args=args@entry=0x20014077a20,
    nargsf=nargsf@entry=1, kwnames=kwnames@entry=0x0) at ./Include/internal/pycore_call.h:167
#31 0x00000000006a493e in context_run (self=<_contextvars.Context at remote 0x20014070790>, args=0x20014077a18, nargs=2, kwnames=0x0) at Python/context.c:728
#32 0x0000000000531e1d in cfunction_vectorcall_FASTCALL_KEYWORDS (func=<built-in method run of _contextvars.Context object at remote 0x20014070790>, args=0x20014077a18, nargsf=<optimized out>, kwnames=0x0)
    at ./Include/cpython/methodobject.h:50
#33 0x00000000004b7bff in _PyVectorcall_Call (tstate=tstate@entry=0xb5fb30, func=0x531d16 <cfunction_vectorcall_FASTCALL_KEYWORDS>,
    callable=callable@entry=<built-in method run of _contextvars.Context object at remote 0x20014070790>,
    tuple=tuple@entry=(<built-in method task_wakeup of _asyncio.Task object at remote 0x200142d0120>, <_asyncio.Future() at remote 0x200142e0260>), kwargs=kwargs@entry=0x0) at ./Include/object.h:783
#34 0x00000000004b7f6b in _PyObject_Call (tstate=0xb5fb30, callable=callable@entry=<built-in method run of _contextvars.Context object at remote 0x20014070790>,
    args=(<built-in method task_wakeup of _asyncio.Task object at remote 0x200142d0120>, <_asyncio.Future() at remote 0x200142e0260>), kwargs=0x0) at Objects/call.c:348
#35 0x00000000004b7fc2 in PyObject_Call (callable=callable@entry=<built-in method run of _contextvars.Context object at remote 0x20014070790>, args=<optimized out>, kwargs=<optimized out>) at Objects/call.c:373
#36 0x000000000065ec31 in _PyEval_EvalFrameDefault (tstate=tstate@entry=0xb5fb30, frame=0x7fbb9efae540, frame@entry=0x7fbb9efae020, throwflag=throwflag@entry=0) at Python/generated_cases.c.h:1778
#37 0x000000000068260b in _PyEval_EvalFrame (throwflag=0, frame=0x7fbb9efae020, tstate=0xb5fb30) at ./Include/internal/pycore_ceval.h:116
#38 _PyEval_Vector (tstate=<optimized out>, func=<optimized out>, locals=locals@entry=0x0, args=0x7fbb9ddffd08, argcount=1, kwnames=<optimized out>) at Python/ceval.c:1911
#39 0x00000000004b5444 in _PyFunction_Vectorcall (func=<optimized out>, stack=<optimized out>, nargsf=<optimized out>, kwnames=<optimized out>) at Objects/call.c:413
#40 0x00000000004ba0c6 in _PyObject_VectorcallTstate (kwnames=0x0, nargsf=1, args=0x7fbb9ddffd08, callable=<function at remote 0x20000b8a810>, tstate=0xb5fb30) at ./Include/internal/pycore_call.h:167
#41 method_vectorcall (method=<optimized out>, args=<optimized out>, nargsf=<optimized out>, kwnames=0x0) at Objects/classobject.c:71
#42 0x00000000004b7bff in _PyVectorcall_Call (tstate=tstate@entry=0xb5fb30, func=0x4b9e34 <method_vectorcall>, callable=callable@entry=<method at remote 0x200019ccbb0>, tuple=tuple@entry=(), kwargs=kwargs@entry=0x0)
    at ./Include/object.h:783
#43 0x00000000004b7f6b in _PyObject_Call (tstate=0xb5fb30, callable=<method at remote 0x200019ccbb0>, args=(), kwargs=0x0) at Objects/call.c:348
#44 0x00000000004b7fc2 in PyObject_Call (callable=<optimized out>, args=<optimized out>, kwargs=<optimized out>) at Objects/call.c:373
#45 0x00000000007b8fc9 in thread_run (boot_raw=boot_raw@entry=0xb52d30) at ./Modules/_threadmodule.c:346
#46 0x0000000000727ff9 in pythread_wrapper (arg=<optimized out>) at Python/thread_pthread.h:242
#47 0x00007fbb9f289d82 in start_thread () from /lib64/libc.so.6
--Type <RET> for more, q to quit, c to continue without paging--
#48 0x00007fbb9f30ee20 in clone3 () from /lib64/libc.so.6
(gdb)

cc @kumaraditya303

CPython versions tested on:

CPython main branch

Operating systems tested on:

Linux

Output from running 'python -VV' on the command line:

Python 3.14.0a3+ experimental free-threading build (heads/main:58a9133fc2c, Jan 8 2025, 16:10:49) [GCC 11.5.0 20240719 (Red Hat 11.5.0-2)]
@mpage mpage added tests Tests in the Lib/test dir type-crash A hard crash of the interpreter, possibly with a core dump topic-free-threading labels Jan 9, 2025
@kumaraditya303 kumaraditya303 added the topic-asyncio label Jan 9, 2025
@github-project-automation github-project-automation bot added this to asyncio Jan 9, 2025
@github-project-automation github-project-automation bot moved this to Todo in asyncio Jan 9, 2025
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#128541 would fix this

cc @colesbury

@kumaraditya303 kumaraditya303 linked a pull request Jan 9, 2025 that will close this issue
gh-128002: fix asyncio.all_tasks against concurrent deallocations of tasks #128541
Merged
@kumaraditya303 kumaraditya303 closed this as completed in #128541 Jan 9, 2025
@github-project-automation github-project-automation bot moved this from Todo to Done in asyncio Jan 9, 2025
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gh-128002: fix asyncio.all_tasks against concurrent deallocations of tasks kumaraditya303/cpython
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