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Subject: [Bug 197376] lang/python27: random module leaks file descriptor into
 child process
Date: Fri, 13 Feb 2015 04:13:14 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=197376

--- Comment #3 from Ed Maste <emaste@freebsd.org> ---
It is fixed in python 3.4.2 - see test result below. Looks like the fix[1] is
not in 2.x though. The fix is PEP 446 - issue 18571[2]

[1]
https://github.com/python/cpython/commit/621f57c094e7572bb4aa2734fe7264856921fc27
[2] http://bugs.python.org/issue18571

LLDB people do not see this issue on Linux; I do not yet know if they're using
Python 3 or if there's some other difference.

Also os.urandom() is sufficient to demonstrate the problem:

Python 2.7.9 (default, Jan  8 2015, 21:47:19) 
[GCC 4.2.1 Compatible FreeBSD Clang 3.3 (tags/RELEASE_33/final 183502)] on
freebsd10
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> os.urandom(1)
'8'
>>> os.system("./a.out")
File descriptor 3 is open.
512
>>> 
feynman% python3
Python 3.4.2 (default, Jan 28 2015, 05:38:04) 
[GCC 4.2.1 Compatible FreeBSD Clang 3.3 (tags/RELEASE_33/final 183502)] on
freebsd10
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> os.urandom(1)
b'\x00'
>>> os.system("./a.out")
0

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