Memory error in generated FMUs

[dddvision]

It seems that all FMUs generated with pythonfmu exhibit a similar memory error. For example, using Resistor.fmu on Ubuntu 20.04 with Python3.12, the memory error can be observed as follows:

Create Resistor_memory_error.py:

from fmpy import read_model_description, extract
from fmpy.fmi2 import FMU2Slave
import shutil

def load_fmu(file_path):
    model_description = read_model_description(file_path, validate=True)
    unzipdir = extract(file_path)
    fmu = FMU2Slave(guid=model_description.guid, unzipDirectory=unzipdir, modelIdentifier=model_description.coSimulation.modelIdentifier)
    fmu.instantiate()
    fmu.terminate()
    fmu.freeInstance()
    shutil.rmtree(unzipdir, ignore_errors=False)

load_fmu("Resistor.fmu")

Run valgrind:

valgrind --leak-check=full --show-leak-kinds=all --track-origins=yes --log-file="fmu_memory_use.log" Resistor_memory_error.py

Observe result in fmu_memory_use.log:

==10839== Invalid read of size 4
==10839==    at 0x1C479932: finalizePythonInterpreter (in /tmp/tmpmz0zx7v4/binaries/linux64/Resistor.so)
==10839==    by 0x4011F6A: _dl_fini (dl-fini.c:138)
==10839==    by 0x4F7F8A6: __run_exit_handlers (exit.c:108)
==10839==    by 0x4F7FA5F: exit (exit.c:139)
==10839==    by 0x4F5D089: (below main) (libc-start.c:342)
==10839==  Address 0x6a84a18 is 8 bytes inside a block of size 128 free'd
==10839==    at 0x483CFBF: operator delete(void*) (in /usr/lib/x86_64-linux-gnu/valgrind/vgpreload_memcheck-amd64-linux.so)
==10839==    by 0x4F7F8A6: __run_exit_handlers (exit.c:108)
==10839==    by 0x4F7FA5F: exit (exit.c:139)
==10839==    by 0x4F5D089: (below main) (libc-start.c:342)
==10839==  Block was alloc'd at
==10839==    at 0x483BE63: operator new(unsigned long) (in /usr/lib/x86_64-linux-gnu/valgrind/vgpreload_memcheck-amd64-linux.so)
==10839==    by 0x1C47ED79: CppfmuInstantiateSlave(char const*, char const*, char const*, char const*, double, int, int, cppfmu::Memory, cppfmu::Logger const&) (in /tmp/tmpmz0zx7v4/binaries/linux64/Resistor.so)
==10839==    by 0x1C47620F: fmi2Instantiate (in /tmp/tmpmz0zx7v4/binaries/linux64/Resistor.so)
==10839==    by 0x4F31FF4: ??? (in /usr/lib/x86_64-linux-gnu/libffi.so.7.1.0)
==10839==    by 0x4F31409: ??? (in /usr/lib/x86_64-linux-gnu/libffi.so.7.1.0)
==10839==    by 0x5E32BA6: _call_function_pointer (callproc.c:931)
==10839==    by 0x5E32BA6: _ctypes_callproc (callproc.c:1273)
==10839==    by 0x5E318EB: PyCFuncPtr_call (_ctypes.c:4173)
==10839==    by 0x4A7165D: PyObject_Call (object.h:705)
==10839==    by 0x4ADFAC1: _PyEval_EvalFrameDefault (bytecodes.c:3263)
==10839==    by 0x4B7CEE5: PyEval_EvalCode (ceval.c:578)
==10839==    by 0x4B9E8B0: run_eval_code_obj (pythonrun.c:1722)
==10839==    by 0x4B9E82A: run_mod (pythonrun.c:1743)