Bug#638024: [apt] APT::Default-Release considers equivalent suite names differently ("testing" != "wheezy")

[Michael Gentry <mike.h.gentry@gmail.com>]

I don't know whether this is the same bug in apt, or a different bug
in apt-p2p. If the latter, sorry for the noise. This is in a more or
less cleanly installed VM with sources mixed between Testing / Sid /
Experimental. I've attached a log in which I 'aptitude update' and
then 'aptitude install less'. This is an excerpt:

2012-12-13 20:27:00+0000 [-] An error occurred while looking up a hash
for: /dists/experimental/InRelease
2012-12-13 20:27:00+0000 [-] Unhandled Error
	Traceback (most recent call last):
	  File "/usr/lib/python2.7/threading.py", line 524, in __bootstrap
	    self.__bootstrap_inner()
	  File "/usr/lib/python2.7/threading.py", line 551, in __bootstrap_inner
	    self.run()
	  File "/usr/lib/python2.7/threading.py", line 504, in run
	    self.__target(*self.__args, **self.__kwargs)
	--- <exception caught here> ---
	  File "/usr/lib/python2.7/dist-packages/twisted/python/threadpool.py",
line 207, in _worker
	    result = context.call(ctx, function, *args, **kwargs)
	  File "/usr/lib/python2.7/dist-packages/twisted/python/context.py",
line 118, in callWithContext
	    return self.currentContext().callWithContext(ctx, func, *args, **kw)
	  File "/usr/lib/python2.7/dist-packages/twisted/python/context.py",
line 81, in callWithContext
	    return func(*args,**kw)
	  File "/usr/lib/pymodules/python2.7/apt_p2p/AptPackages.py", line
334, in _load
	    self.cache = apt_pkg.Cache(OpProgress())
	exceptions.SystemError: E:The value 'testing' is invalid for
APT::Default-Release as such a release is not available in the sources

-------

# cat /etc/apt/sources.list.d/*
# deb http://ftp.de.debian.org/debian/ experimental main

deb http://localhost:9977/ftp.de.debian.org/debian/ experimental main
non-free contrib
deb-src http://localhost:9977/ftp.de.debian.org/debian/ experimental
main non-free contrib
# deb http://ftp.de.debian.org/debian/ unstable main

deb http://localhost:9977/ftp.de.debian.org/debian/ unstable main
non-free contrib
deb-src http://localhost:9977/ftp.de.debian.org/debian/ unstable main
non-free contrib
# deb http://ftp.de.debian.org/debian/ testing main

deb http://localhost:9977/ftp.de.debian.org/debian/ testing main
non-free contrib
deb-src http://localhost:9977/ftp.de.debian.org/debian/ testing main
non-free contrib


# apt-cache policy apt apt-p2p
apt:
  Installed: 0.9.7.6
  Candidate: 0.9.7.6
  Version table:
     0.9.7.7 0
        500 http://localhost/ftp.de.debian.org/debian/ unstable/main
amd64 Packages
 *** 0.9.7.6 0
        990 http://localhost/ftp.de.debian.org/debian/ testing/main
amd64 Packages
        100 /var/lib/dpkg/status
apt-p2p:
  Installed: 0.1.6+nmu1
  Candidate: 0.1.6+nmu1
  Version table:
 *** 0.1.6+nmu1 0
        500 http://localhost/ftp.de.debian.org/debian/ unstable/main
amd64 Packages
        990 http://localhost/ftp.de.debian.org/debian/ testing/main
amd64 Packages
        100 /var/lib/dpkg/status


# cat /etc/apt/apt.conf.d/80defaultrelease
APT::Default-Release "testing";

Attachment: apt-p2p.log
Description: Binary data