Wesley Kerfoot added the comment:

Description:
python 2.7.8 fails with a 'stack smashing detected' error and aborts when 
trying to access a C union using ctypes/libffi

Steps to reproduce: see the attached shell script which reproduces the issue on 
Ubuntu 13.10 and Arch Linux

Also fails with clang instead of gcc.

OS: Linux frege 3.15.8-1-ARCH #1 SMP PREEMPT Fri Aug 1 08:51:42 CEST 2014 
x86_64 GNU/Linux
python2 version: 2.7.8
libffi version (OS wide version): 3.1-2
gcc version: 4.9.1
clang version: 3.4.2

Here is the PKGBUILD file Arch uses 
https://projects.archlinux.org/svntogit/packages.git/tree/python2/trunk/PKGBUILD?id=c319b32ada1506cf2bd48acc50649ae77a696c53

I have also reported this bug on their tracker since I am not sure if this is a 
bug in ctypes or libffi or both: https://bugs.archlinux.org/task/41502

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Added file: http://bugs.python.org/file36320/crash.sh

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<http://bugs.python.org/issue22171>
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