Question about propagating universal_newlines through subprocess.Popen to io.TextIOWrapper

[Bill Deegan]

Greetings,

I was surprised to see that if I set encoding in my call to
subprocess.Popen() as follows:

p = Popen(cmd,
          stdin=stdin,
          stdout=subprocess.PIPE,
          stderr=stderr_value,
          env=os.environ,
          universal_newlines=False, #universal_newlines,
          encoding='utf-8')

That universal_newlines value is discarded due to:

text_mode = encoding or errors or universal_newlines

...


if text_mode:
    self.stdout = io.TextIOWrapper(self.stdout,
            encoding=encoding, errors=errors)


There doesn't seem to be a way to set encoding without forcing
univeral_newlines.

This seems like a bug?

-Bill