Here's the smallest reproducer I could come up with. It fails on Windows with 3.9 native(compiled locally) (Fatal Python error: _Py_CheckRecursiveCall: Cannot recover from stack overflow), works (raises RecursionError) with cygwin 3.8.3.

import os

def status():
    for fd in range(4):
        try:
            st = os.fstat(fd)
        except status() as e:
            pass

status()