:old-man-yells-at-windows:

Author: gpshead

Lib/multiprocessing/resource_tracker.py

@@ -148,7 +148,7 @@ def _stop_locked(
         waitstatus_to_exitcode=os.waitstatus_to_exitcode,
         monotonic=time.monotonic,
         sleep=time.sleep,
-        WNOHANG=os.WNOHANG,
+        WNOHANG=getattr(os, 'WNOHANG', None),
         wait_timeout=None,
     ):
         # This shouldn't happen (it might when called by a finalizer)