F20 python 2.7.5-12 breaks cpopen

[Francesco Romani]

Hi Infra,

I just discovered the hard way that the last python package in F20

# rpm -qi python
Name        : python
Version     : 2.7.5
Release     : 12.fc20
Architecture: x86_64
Install Date: Mon 23 Jun 2014 08:28:32 AM CEST
Group       : Development/Languages
Size        : 80819
License     : Python
Signature   : RSA/SHA256, Thu 19 Jun 2014 04:49:28 PM CEST, Key ID 2eb161fa246110c1
Source RPM  : python-2.7.5-12.fc20.src.rpm
Build Date  : Thu 19 Jun 2014 02:54:35 PM CEST
Build Host  : buildvm-24.phx2.fedoraproject.org
Relocations : (not relocatable)
Packager    : Fedora Project
Vendor      : Fedora Project
URL         : http://www.python.org/
Summary     : An interpreted, interactive, object-oriented programming language

[...]

Includes this apparently innocuous change:
* Thu Jun 19 2014 Bohuslav Kabrda <bkabrda at redhat.com> - 2.7.5-12
- Fix test failures with SQLite 3.8.4
- Fix double close of subprocess pipes when child process fails Resolves: rhbz#1103450 <<< THIS ONE!

Which is 
http://hg.python.org/cpython/rev/43749cb6bdbd

If we try to run VDSM tests using cpopen 1.3-2[1]

we'll get: http://fpaste.org/112115/

the fix is simple: just use execute_child_v276 and everything will work again.
How can we detect and react properly to this schenario, however?

Thanks,

+++

[1]
# rpm -qi python-cpopen
Name        : python-cpopen
Version     : 1.3
Release     : 2.fc20
Architecture: x86_64
Install Date: Sat 15 Feb 2014 09:50:01 PM CET


-- 
Francesco Romani
RedHat Engineering Virtualization R & D
Phone: 8261328
IRC: fromani