[issue35762] subprocess.Popen with universal_newlines and nonblocking streams fails with "can't concat NoneType to bytes"

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

I close this issue as a duplicate of bpo-13322 which is older and has a longer history.

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nosy: +vstinner
resolution:  -> duplicate
stage:  -> resolved
status: open -> closed
superseder:  -> buffered read() and write() does not raise BlockingIOError

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<https://bugs.python.org/issue35762>
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