[issue2222] Memory leak in os.rename?

[Hirokazu Yamamoto]

Hirokazu Yamamoto added the comment:

Alexander, I've looked into Python/getargs.c, I think posix_2str code is
fine. (PyArg_ParseTuple with format "et")
After conversion succeeded on path1, addcleanup() adds memory buffer
for path1 into freelist. When error happend on path2, its memory will be
freed on cleanreturn().

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