importconcurrent.futuresimportfunctoolsimportgcimportthreadingnum_threads=10defclosure(b):b.wait()for_inrange(100):gc.disable()gc.enable()withconcurrent.futures.ThreadPoolExecutor(max_workers=num_threads)asexecutor:foriinrange(100):b=threading.Barrier(num_threads)for_inrange(num_threads):executor.submit(functools.partial(closure,b))

WARNING: ThreadSanitizer: data race (pid=3441855)  Write of size 4 at 0x5576617e4e34 by thread T10:    #0 PyGC_Disable /usr/local/google/home/phawkins/p/cpython/Python/gc_free_threading.c:1508:22 (python3.13+0x444e39) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #1 gc_disable_impl /usr/local/google/home/phawkins/p/cpython/Modules/gcmodule.c:51:5 (python3.13+0x4d8cbf) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #2 gc_disable /usr/local/google/home/phawkins/p/cpython/Modules/clinic/gcmodule.c.h:45:12 (python3.13+0x4d8cbf)    #3 cfunction_vectorcall_NOARGS /usr/local/google/home/phawkins/p/cpython/Objects/methodobject.c:484:24 (python3.13+0x289ed9) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #4 _PyObject_VectorcallTstate /usr/local/google/home/phawkins/p/cpython/./Include/internal/pycore_call.h:168:11 (python3.13+0x1ead4a) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #5 PyObject_Vectorcall /usr/local/google/home/phawkins/p/cpython/Objects/call.c:327:12 (python3.13+0x1ead4a)    #6 _PyEval_EvalFrameDefault /usr/local/google/home/phawkins/p/cpython/Python/generated_cases.c.h:813:23 (python3.13+0x3e271b) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #7 _PyEval_EvalFrame /usr/local/google/home/phawkins/p/cpython/./Include/internal/pycore_ceval.h:119:16 (python3.13+0x3de84a) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #8 _PyEval_Vector /usr/local/google/home/phawkins/p/cpython/Python/ceval.c:1812:12 (python3.13+0x3de84a)    #9 _PyFunction_Vectorcall /usr/local/google/home/phawkins/p/cpython/Objects/call.c (python3.13+0x1eb3bf) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #10 _PyObject_VectorcallTstate /usr/local/google/home/phawkins/p/cpython/./Include/internal/pycore_call.h:168:11 (python3.13+0x5723a2) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #11 partial_vectorcall /usr/local/google/home/phawkins/p/cpython/./Modules/_functoolsmodule.c:252:16 (python3.13+0x5723a2)    #12 _PyVectorcall_Call /usr/local/google/home/phawkins/p/cpython/Objects/call.c:273:16 (python3.13+0x1eb033) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #13 _PyObject_Call /usr/local/google/home/phawkins/p/cpython/Objects/call.c:348:16 (python3.13+0x1eb033)    #14 PyObject_Call /usr/local/google/home/phawkins/p/cpython/Objects/call.c:373:12 (python3.13+0x1eb0b5) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #15 _PyEval_EvalFrameDefault /usr/local/google/home/phawkins/p/cpython/Python/generated_cases.c.h:1355:26 (python3.13+0x3e4902) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #16 _PyEval_EvalFrame /usr/local/google/home/phawkins/p/cpython/./Include/internal/pycore_ceval.h:119:16 (python3.13+0x3de84a) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #17 _PyEval_Vector /usr/local/google/home/phawkins/p/cpython/Python/ceval.c:1812:12 (python3.13+0x3de84a)    #18 _PyFunction_Vectorcall /usr/local/google/home/phawkins/p/cpython/Objects/call.c (python3.13+0x1eb3bf) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #19 _PyObject_VectorcallTstate /usr/local/google/home/phawkins/p/cpython/./Include/internal/pycore_call.h:168:11 (python3.13+0x1ef38f) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #20 method_vectorcall /usr/local/google/home/phawkins/p/cpython/Objects/classobject.c:70:20 (python3.13+0x1ef38f)    #21 _PyVectorcall_Call /usr/local/google/home/phawkins/p/cpython/Objects/call.c:273:16 (python3.13+0x1eb033) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #22 _PyObject_Call /usr/local/google/home/phawkins/p/cpython/Objects/call.c:348:16 (python3.13+0x1eb033)    #23 PyObject_Call /usr/local/google/home/phawkins/p/cpython/Objects/call.c:373:12 (python3.13+0x1eb0b5) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #24 thread_run /usr/local/google/home/phawkins/p/cpython/./Modules/_threadmodule.c:337:21 (python3.13+0x564a82) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #25 pythread_wrapper /usr/local/google/home/phawkins/p/cpython/Python/thread_pthread.h:243:5 (python3.13+0x4bdd87) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)  Previous write of size 4 at 0x5576617e4e34 by thread T9:    #0 PyGC_Enable /usr/local/google/home/phawkins/p/cpython/Python/gc_free_threading.c:1499:22 (python3.13+0x444dc9) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #1 gc_enable_impl /usr/local/google/home/phawkins/p/cpython/Modules/gcmodule.c:37:5 (python3.13+0x4d8c9f) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #2 gc_enable /usr/local/google/home/phawkins/p/cpython/Modules/clinic/gcmodule.c.h:27:12 (python3.13+0x4d8c9f)    #3 cfunction_vectorcall_NOARGS /usr/local/google/home/phawkins/p/cpython/Objects/methodobject.c:484:24 (python3.13+0x289ed9) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #4 _PyObject_VectorcallTstate /usr/local/google/home/phawkins/p/cpython/./Include/internal/pycore_call.h:168:11 (python3.13+0x1ead4a) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #5 PyObject_Vectorcall /usr/local/google/home/phawkins/p/cpython/Objects/call.c:327:12 (python3.13+0x1ead4a)    #6 _PyEval_EvalFrameDefault /usr/local/google/home/phawkins/p/cpython/Python/generated_cases.c.h:813:23 (python3.13+0x3e271b) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #7 _PyEval_EvalFrame /usr/local/google/home/phawkins/p/cpython/./Include/internal/pycore_ceval.h:119:16 (python3.13+0x3de84a) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #8 _PyEval_Vector /usr/local/google/home/phawkins/p/cpython/Python/ceval.c:1812:12 (python3.13+0x3de84a)    #9 _PyFunction_Vectorcall /usr/local/google/home/phawkins/p/cpython/Objects/call.c (python3.13+0x1eb3bf) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #10 _PyObject_VectorcallTstate /usr/local/google/home/phawkins/p/cpython/./Include/internal/pycore_call.h:168:11 (python3.13+0x5723a2) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #11 partial_vectorcall /usr/local/google/home/phawkins/p/cpython/./Modules/_functoolsmodule.c:252:16 (python3.13+0x5723a2)    #12 _PyVectorcall_Call /usr/local/google/home/phawkins/p/cpython/Objects/call.c:273:16 (python3.13+0x1eb033) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #13 _PyObject_Call /usr/local/google/home/phawkins/p/cpython/Objects/call.c:348:16 (python3.13+0x1eb033)    #14 PyObject_Call /usr/local/google/home/phawkins/p/cpython/Objects/call.c:373:12 (python3.13+0x1eb0b5) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #15 _PyEval_EvalFrameDefault /usr/local/google/home/phawkins/p/cpython/Python/generated_cases.c.h:1355:26 (python3.13+0x3e4902) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #16 _PyEval_EvalFrame /usr/local/google/home/phawkins/p/cpython/./Include/internal/pycore_ceval.h:119:16 (python3.13+0x3de84a) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #17 _PyEval_Vector /usr/local/google/home/phawkins/p/cpython/Python/ceval.c:1812:12 (python3.13+0x3de84a)    #18 _PyFunction_Vectorcall /usr/local/google/home/phawkins/p/cpython/Objects/call.c (python3.13+0x1eb3bf) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #19 _PyObject_VectorcallTstate /usr/local/google/home/phawkins/p/cpython/./Include/internal/pycore_call.h:168:11 (python3.13+0x1ef38f) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #20 method_vectorcall /usr/local/google/home/phawkins/p/cpython/Objects/classobject.c:70:20 (python3.13+0x1ef38f)    #21 _PyVectorcall_Call /usr/local/google/home/phawkins/p/cpython/Objects/call.c:273:16 (python3.13+0x1eb033) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)    #22 _PyObject_Call /usr/local/google/home/phawkins/p/cpython/Objects/call.c:348:16 (python3.13+0x1eb033)    #23 PyObject_Call /usr/local/google/home/phawkins/p/cpython/Objects/call.c:373:12 (python3.13+0x1eb0b5) (BuildId: 64364346a930c8e649018fed7b43c1cc0e8920e5)

WARNING: ThreadSanitizer: data race (pid=145998)  Read of size 4 at 0x55cb2fa81e34 by thread T64 (mutexes: read M0):    #0 gc_should_collect /__w/jax/jax/cpython/Python/gc_free_threading.c:1062:59 (python3.13+0x44732b) (BuildId: c9937216e103905f871b62bf50b66fc5a8e96f80)    #1 record_allocation /__w/jax/jax/cpython/Python/gc_free_threading.c:1086:13 (python3.13+0x44732b)    #2 gc_alloc /__w/jax/jax/cpython/Python/gc_free_threading.c:1708:5 (python3.13+0x44732b)    #3 _PyObject_GC_New /__w/jax/jax/cpython/Python/gc_free_threading.c:1720:20 (python3.13+0x447101) (BuildId: c9937216e103905f871b62bf50b66fc5a8e96f80)    #4 tuple_iter /__w/jax/jax/cpython/Objects/tupleobject.c:1110:10 (python3.13+0x2e0700) (BuildId: c9937216e103905f871b62bf50b66fc5a8e96f80)    #5 PyObject_GetIter /__w/jax/jax/cpython/Objects/abstract.c:2860:25 (python3.13+0x1c1f12) (BuildId: c9937216e103905f871b62bf50b66fc5a8e96f80)...  Previous write of size 4 at 0x55cb2fa81e34 by thread T70 (mutexes: read M0):    #0 PyGC_Disable /__w/jax/jax/cpython/Python/gc_free_threading.c:1508:22 (python3.13+0x444e39) (BuildId: c9937216e103905f871b62bf50b66fc5a8e96f80)    #1 __Pyx_PyType_Ready _traversal.c (_traversal.cpython-313t-x86_64-linux-gnu.so+0x7b16) (BuildId: 0e187ad70a2faa86eeb3f1292897a0491466b409)    #2 exec_builtin_or_dynamic /__w/jax/jax/cpython/Python/import.c:815:12 (python3.13+0x4658d0) (BuildId: c9937216e103905f871b62bf50b66fc5a8e96f80)    #3 _imp_exec_dynamic_impl /__w/jax/jax/cpython/Python/import.c:4756:12 (python3.13+0x4658d0)    #4 _imp_exec_dynamic /__w/jax/jax/cpython/Python/clinic/import.c.h:513:21 (python3.13+0x4658d0)    #5 cfunction_vectorcall_O /__w/jax/jax/cpython/Objects/methodobject.c:512:24 (python3.13+0x28a135) (BuildId: c9937216e103905f871b62bf50b66fc5a8e96f80)    #6 _PyVectorcall_Call /__w/jax/jax/cpython/Objects/call.c:273:16 (python3.13+0x1eb033) (BuildId: c9937216e103905f871b62bf50b66fc5a8e96f80)...