[issue7561] Filename-taking functions in posix segfault when called with a bytearray arg.

[Sebastian Hagen]

Sebastian Hagen <sh_pybugs at memespace.net> added the comment:

Not exactly. The last part fixes the second problem, which you get for
non-zero-length bytearrays. But without the first fix, zero-length
bytearrays still lead to a crash:

Python 3.2a0 (py3k:77001M, Dec 22 2009, 18:17:08)
[GCC 4.3.4] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import posix
>>> posix.mkdir(bytearray(0))
Segmentation fault

That's what the rest of the patch fixes.

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<http://bugs.python.org/issue7561>
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