New submission from Nathan Michaels <nmicha...@gmail.com>:

>>> from multiprocessing.connection import Listener
>>> listener = Listener('\0conntest', family='AF_UNIX')
>>> listener.close()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python3.6/multiprocessing/connection.py", line 466, in close
    listener.close()
  File "/usr/lib64/python3.6/multiprocessing/connection.py", line 604, in close
    unlink()
  File "/usr/lib64/python3.6/multiprocessing/util.py", line 186, in __call__
    res = self._callback(*self._args, **self._kwargs)
ValueError: embedded null byte

Linux has a handy feature where if the first byte of a unix domain socket's 
name is the null character, it won't put it in the filesystem. The socket 
interface works fine with it, but when SocketListener is wrapped around a 
socket, it throws this exception.

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue39850>
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