PS C:\temp\ptr> C:\temp\tp\Scripts\black.exe --check .\ci.py .\ptr.py .\ptr_tests.py .\ptr_tests_fixtures.py
Process SpawnProcess-2:
Process SpawnProcess-1:
Traceback (most recent call last):
  File "C:\Users\cooper\AppData\Local\Programs\Python\Python37\lib\multiprocessing\process.py", line 297, in _bootstrap
    self.run()
  File "C:\Users\cooper\AppData\Local\Programs\Python\Python37\lib\multiprocessing\process.py", line 99, in run
    self._target(*self._args, **self._kwargs)
  File "C:\Users\cooper\AppData\Local\Programs\Python\Python37\lib\concurrent\futures\process.py", line 226, in _process_worker
    call_item = call_queue.get(block=True)
  File "C:\Users\cooper\AppData\Local\Programs\Python\Python37\lib\multiprocessing\queues.py", line 93, in get
    with self._rlock:
  File "C:\Users\cooper\AppData\Local\Programs\Python\Python37\lib\multiprocessing\synchronize.py", line 95, in __enter__
    return self._semlock.__enter__()
KeyboardInterrupt
Traceback (most recent call last):
  File "C:\Users\cooper\AppData\Local\Programs\Python\Python37\lib\multiprocessing\process.py", line 297, in _bootstrap
    self.run()
  File "C:\Users\cooper\AppData\Local\Programs\Python\Python37\lib\multiprocessing\process.py", line 99, in run
    self._target(*self._args, **self._kwargs)
  File "C:\Users\cooper\AppData\Local\Programs\Python\Python37\lib\concurrent\futures\process.py", line 226, in _process_worker
    call_item = call_queue.get(block=True)
  File "C:\Users\cooper\AppData\Local\Programs\Python\Python37\lib\multiprocessing\queues.py", line 93, in get
    with self._rlock:
  File "C:\Users\cooper\AppData\Local\Programs\Python\Python37\lib\multiprocessing\synchronize.py", line 95, in __enter__
    return self._semlock.__enter__()
KeyboardInterrupt
Future exception was never retrieved
future: <Future finished exception=BrokenProcessPool('A process in the process pool was terminated abruptly while the future was running or pending.')>
concurrent.futures.process.BrokenProcessPool: A process in the process pool was terminated abruptly while the future was running or pending.

Aborted!