Intermittent CI _parse_ffi_str failure

[mborgerson]

Description

 _______________ ERROR collecting tests/test_arm_postprocess.py ________________
pyvex\tests\test_arm_postprocess.py:1: in <module>
    import pyvex
C:\Users\runneradmin\venv\lib\site-packages\pyvex\__init__.py:8: in <module>
    from . import const, expr, stmt
C:\Users\runneradmin\venv\lib\site-packages\pyvex\const.py:3: in <module>
    from .enums import VEXObject, get_enum_from_int
C:\Users\runneradmin\venv\lib\site-packages\pyvex\enums.py:3: in <module>
    from .native import ffi, pvc
C:\Users\runneradmin\venv\lib\site-packages\pyvex\native.py:74: in <module>
    pvc: Any = _find_c_lib()  # This should be properly typed, but this seems non trivial
C:\Users\runneradmin\venv\lib\site-packages\pyvex\native.py:64: in _find_c_lib
    _parse_ffi_str()
C:\Users\runneradmin\venv\lib\site-packages\pyvex\native.py:39: in _parse_ffi_str
    cache = pickle.loads(f.read())
E   EOFError: Ran out of input

Looks like an init race in:

pyvex/pyvex/native.py

Line 39 in 390b91e

cache = pickle.loads(f.read())

when running pytest via

pyvex/.github/workflows/windows.yml

Line 39 in 390b91e

pytest -n auto pyvex

.

Steps to reproduce the bug

No response

Environment

pyvex @ 390b91e

Additional context

No response