python is crashing with 'malloc' error when batch processing

[ap-respeecher]

When I apply a pyreaper.reaper function on a folder of files, it's crashing with this error:

python(94746,0x119755dc0) malloc: Incorrect checksum for freed object 0x7f9d2c43d780: probably modified after being freed.
Corrupt value: 0x800000003f052325
python(94746,0x119755dc0) malloc: *** set a breakpoint in malloc_error_break to debug
Abort trap: 6

I tried python 3.6.9 with pyreaper 0.0.8 and 0.0.6 and python 3.7.8 with pyreaper 0.0.8. Here is an output from the report on mac os in case that might help:

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 libsystem_kernel.dylib 0x00007fff6e86033a __pthread_kill + 10
1 libsystem_pthread.dylib 0x00007fff6e91ce60 pthread_kill + 430
2 libsystem_c.dylib 0x00007fff6e7e7808 abort + 120
3 libsystem_malloc.dylib 0x00007fff6e8dd50b malloc_vreport + 548
4 libsystem_malloc.dylib 0x00007fff6e8eed27 malloc_zone_error + 183
5 libsystem_malloc.dylib 0x00007fff6e8d5081 tiny_free_list_remove_ptr + 690
6 libsystem_malloc.dylib 0x00007fff6e8d4279 tiny_free_no_lock + 1018
7 libsystem_malloc.dylib 0x00007fff6e8d3d8b free_tiny + 459
8 creaper.cpython-36m-darwin.so 0x000000013ad2b952 __pyx_f_8pyreaper_7creaper_12EpochTracker_GetF0AndCorrTrack(__pyx_obj_8pyreaper_7creaper_EpochTracker*, float, Track*, Track*) + 578
9 creaper.cpython-36m-darwin.so 0x000000013ad3201a __pyx_pf_8pyreaper_7creaper_reaper_internal(_object*, tagPyArrayObject_fields*, _object*, float, float, bool, bool, float, float, float) + 5306
10 python 0x000000010eab28fb _PyCFunction_FastCallDict + 475
11 python 0x000000010eb42d4b call_function + 539
12 python 0x000000010eb3f98e _PyEval_EvalFrameDefault + 26014
13 python 0x000000010eb438aa _PyEval_EvalCodeWithName + 2698
14 python 0x000000010eb440b2 fast_function + 386
15 python 0x000000010eb42d15 call_function + 485
16 python 0x000000010eb3fa34 _PyEval_EvalFrameDefault + 26180
17 python 0x000000010eb438aa _PyEval_EvalCodeWithName + 2698
18 python 0x000000010eb440b2 fast_function + 386
19 python 0x000000010eb42d15 call_function + 485
20 python 0x000000010eb3f98e _PyEval_EvalFrameDefault + 26014
21 python 0x000000010eb438aa _PyEval_EvalCodeWithName + 2698
22 python 0x000000010eb440b2 fast_function + 386
23 python 0x000000010eb42d15 call_function + 485
24 python 0x000000010eb3f98e _PyEval_EvalFrameDefault + 26014
25 python 0x000000010eb438aa _PyEval_EvalCodeWithName + 2698
26 python 0x000000010eb440b2 fast_function + 386
27 python 0x000000010eb42d15 call_function + 485
28 python 0x000000010eb3fa34 _PyEval_EvalFrameDefault + 26180
29 python 0x000000010eb44159 fast_function + 553
30 python 0x000000010eb42d15 call_function + 485
31 python 0x000000010eb3f98e _PyEval_EvalFrameDefault + 26014
32 python 0x000000010eb44159 fast_function + 553
33 python 0x000000010eb42d15 call_function + 485
34 python 0x000000010eb3f98e _PyEval_EvalFrameDefault + 26014
35 python 0x000000010eb438aa _PyEval_EvalCodeWithName + 2698
36 python 0x000000010eb39360 PyEval_EvalCode + 48
37 python 0x000000010eb7293e PyRun_FileExFlags + 174
38 python 0x000000010eb71ede PyRun_SimpleFileExFlags + 270
39 python 0x000000010eb8e72a Py_Main + 3306
40 python 0x000000010ea59ac8 main + 248
41 libdyld.dylib 0x00007fff6e718cc9 start + 1

[r9y9]

Could you provide steps/data to reproduce?

[ap-respeecher]

i wrote a script with minimum of code to reproduce a bug and it stopped crashing. thank you for your immediate answer and pardon for bothering