Writing to an SPSS already open file crashes the process in Windows

[pablodegrande]

Describe the issue

Whe trying to create a df to SPSS format, if the file is opened in windows, it kills the process.

To Reproduce

Run the script below in Windows and the process hangs

File example

import pandas as pd
import pyreadstat
import msvcrt
import time

import sys
import platform
import pandas as pd
import pyreadstat

print("Python:", sys.version.replace("\n", " "))
print("Platform:", platform.platform())
print("pandas:", pd.__version__)
print("pyreadstat:", pyreadstat.__version__)

ruta_sav = "salida.sav"

df_init = pd.DataFrame({"id": [0], "nombre": ["init"]})
pyreadstat.write_sav(df_init, ruta_sav)

f = open(ruta_sav, "r+b")
msvcrt.locking(f.fileno(), msvcrt.LK_NBLCK, 1)  # lock no bloqueante

print("archivo lockeado, intentando escribir...")

try:
    df_dpto = pd.DataFrame({
        "id": [1, 2, 3],
        "nombre": ["A", "B", "C"]
    })

    pyreadstat.write_sav(df_dpto, ruta_sav)

    print("escritura completada (no debería si el lock fue efectivo)")
except Exception as e:
    print("error:", e)

time.sleep(10)  # mantener lock activo
f.close()

Expected behavior

print the lock error.

Setup Information:

pip
Python: 3.11.5 (tags/v3.11.5:cce6ba9, Aug 24 2023, 14:38:34) [MSC v.1936 64 bit (AMD64)]
Platform: Windows-10-10.0.26200-SP0
pandas: 1.5.3
pyreadstat: 1.3.4