[issue8850] Remove "w" format of PyParse_ParseTuple()

[STINNER Victor]

STINNER Victor <victor.stinner at haypocalc.com> added the comment:

"w#" is not only useless but also not used in py3k source code. "w" is also not used. Only "w*" is used by fnctl and socket modules.

The problem with w# is that the caller cannot "release" the buffer and so we cannot lock the buffer. I don't know exactly what happens if you get a pointer to a bytearray, release the GIL and then use it, whereas another thread modifies and/or destroys the bytearray object. (I suppose that something bad will happen, like a segfault)

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue8850>
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