non blocking acquire for __del__

Author: luccabb

Lib/multiprocessing/resource_tracker.py

@@ -91,8 +91,8 @@ def _stop(self, use_blocking_lock=True):
             self._lock.release()
 
     def _cleanup(self, close=os.close, waitpid=os.waitpid, waitstatus_to_exitcode=os.waitstatus_to_exitcode):
-        # This should not happen (_stop() isn't called by a finalizer)
-        # but we check for it anyway.
+        # This shouldn't happen (it might when called by a finalizer)
+        # so we check for it anyway.
         if self._lock._recursion_count() > 1:
             return self._reentrant_call_error()
         if self._fd is None: