fromthreadingimportThreadimportgcforxinrange(50):gc.freeze()gc.collect()gc.unfreeze()alive= [Thread(target=gc.unfreeze)forxinrange(10)]fortinalive:t.start()

Python/gc_free_threading.c:1099: validate_refcounts: Assertion "_Py_REFCNT(((PyObject*)((op)))) > 0" failed: tracked objects must have a reference count > 0Enable tracemalloc to get the memory block allocation tracebackobject address  : 0x7bffb27415d0object refcount : 0object type     : 0x5555566e4ea0object type name: methodobject repr     : <refcnt 0 at 0x7bffb27415d0>Fatal Python error: _PyObject_AssertFailed: _PyObject_AssertFailedPython runtime state: initializedStack (most recent call first):  File "/home/danzin/crashers/reduced_gc_abort_source.py", line 6 in <module>Thread 1 "python" received signal SIGABRT, Aborted.

#0  __pthread_kill_implementation (threadid=<optimized out>, signo=6, no_tid=0) at ./nptl/pthread_kill.c:44#1  __pthread_kill_internal (threadid=<optimized out>, signo=6) at ./nptl/pthread_kill.c:89#2  __GI___pthread_kill (threadid=<optimized out>, signo=signo@entry=6) at ./nptl/pthread_kill.c:100#3  0x00007ffff7c45e2e in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26#4  0x00007ffff7c28888 in __GI_abort () at ./stdlib/abort.c:77#5  0x0000555556037974 in fatal_error_exit (status=status@entry=-1) at Python/pylifecycle.c:3284#6  0x000055555603763b in fatal_error (fd=fd@entry=2, header=header@entry=1, prefix=prefix@entry=0x5555563c1340 <__func__._PyObject_AssertFailed> "_PyObject_AssertFailed",    msg=msg@entry=0x5555563c1340 <__func__._PyObject_AssertFailed> "_PyObject_AssertFailed", status=status@entry=-1) at Python/pylifecycle.c:3493#7  0x0000555556033520 in _Py_FatalErrorFunc (func=0x5555563c1340 <__func__._PyObject_AssertFailed> "_PyObject_AssertFailed",    msg=0x5555563c1340 <__func__._PyObject_AssertFailed> "_PyObject_AssertFailed") at Python/pylifecycle.c:3516#8  0x00005555557f143b in _PyObject_AssertFailed (obj=obj@entry=0x7bffb27415d0, expr=<optimized out>, msg=<optimized out>, file=<optimized out>, line=line@entry=1099,    function=<optimized out>) at Objects/object.c:3166#9  0x0000555555f90d9e in validate_refcounts (heap=0x555556940870 <_PyRuntime+410288>, area=<optimized out>, block=<optimized out>, block_size=<optimized out>, args=<optimized out>)    at Python/gc_free_threading.c:1098#10 0x0000555555c24b52 in _mi_heap_area_visit_blocks (area=0x7bfff5c4bfa0, page=<optimized out>, visitor=<optimized out>, arg=<optimized out>) at Objects/mimalloc/heap.c:619#11 0x0000555555c2590f in mi_heap_area_visitor (heap=0x555556940870 <_PyRuntime+410288>, xarea=0x7bfff5c4bfa0, arg=<optimized out>) at Objects/mimalloc/heap.c:681#12 mi_heap_visit_areas_page (heap=0x555556940870 <_PyRuntime+410288>, page=0x7bffb20033c8, pq=<optimized out>, vfun=<optimized out>, arg=<optimized out>) at Objects/mimalloc/heap.c:661#13 mi_heap_visit_pages (heap=0x555556940870 <_PyRuntime+410288>, fn=<optimized out>, arg1=<optimized out>, arg2=<optimized out>) at Objects/mimalloc/heap.c:46#14 mi_heap_visit_areas (heap=0x555556940870 <_PyRuntime+410288>, visitor=<optimized out>, arg=<optimized out>) at Objects/mimalloc/heap.c:667#15 mi_heap_visit_blocks (heap=0x555556940870 <_PyRuntime+410288>, visit_blocks=<optimized out>, visitor=<optimized out>, arg=<optimized out>) at Objects/mimalloc/heap.c:692#16 0x0000555555f85bd4 in gc_visit_heaps_lock_held (interp=0x555556906580 <_PyRuntime+171968>, visitor=0x555555f90ab0 <validate_refcounts>, arg=0x7fffffffbc30)    at Python/gc_free_threading.c:414#17 gc_visit_heaps (interp=interp@entry=0x555556906580 <_PyRuntime+171968>, visitor=0x555555f90ab0 <validate_refcounts>, arg=arg@entry=0x7fffffffbc30) at Python/gc_free_threading.c:453#18 0x0000555555f88032 in gc_collect_internal (interp=0x555556906580 <_PyRuntime+171968>, generation=2, state=<optimized out>) at Python/gc_free_threading.c:2274#19 gc_collect_main (tstate=<optimized out>, generation=2, reason=_Py_GC_REASON_MANUAL) at Python/gc_free_threading.c:2438#20 0x00005555561072ef in gc_collect_impl (module=0x7bffb232a830, generation=2) at Modules/gcmodule.c:93#21 gc_collect (module=<optimized out>, args=0x7fffffffbe28, nargs=<optimized out>, kwnames=0x0) at Modules/clinic/gcmodule.c.h:143#22 0x0000555555e821aa in _Py_BuiltinCallFastWithKeywords_StackRefSteal (callable=callable@entry=..., arguments=0x7e8ff6fe5298, total_args=total_args@entry=0) at Python/ceval.c:1122#23 0x0000555555e9d508 in _PyEval_EvalFrameDefault (tstate=<optimized out>, frame=<optimized out>, throwflag=<optimized out>) at Python/generated_cases.c.h:2336#24 0x0000555555e807f4 in _PyEval_EvalFrame (tstate=0x55555693ec48 <_PyRuntime+403080>, frame=0x7e8ff6fe5220, throwflag=0) at ./Include/internal/pycore_ceval.h:119#25 _PyEval_Vector (tstate=tstate@entry=0x55555693ec48 <_PyRuntime+403080>, func=func@entry=0x7bffb2483c70, locals=locals@entry=0x7bffb26fc8b0, args=args@entry=0x0,    argcount=argcount@entry=0, kwnames=kwnames@entry=0x0) at Python/ceval.c:2482