python3.4 package missing threading module in trusty-security

[bugchecker]

Someone forgot to add threading.py module in libpython3.4-mininal_3.4.0-2ubuntu1.1 package. I fail when trying to work with python3.4 in trusty-security environment.

How to reproduce:
1. Install new Ubuntu Trusty WITHOUT online updates or downgrade all packages to trusty-security.
2. Disable *-updates repositories, update apt cache:
# sed -i -e'/-updates/s/^/# /' /etc/apt/sources.list && apt-get update
3. Upgrade python3 packages:
# apt-get install python3 python3-minimal python3.4 python3.4-minimal libpython3.4-minimal libpython3.4-stdlib
4. Try to import threading module (will fail):
# python3 -c 'import threading'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: No module named 'threading'

Without threading.py `pip3 install` and `add-apt-repository` will fail. Extended terminal output (including apt-cache policy) is in python3.4_trusty_bug_terminal_output.txt . This problem has occured in https://bugs.launchpad.net/ubuntu/+source/python3.4/+bug/1503382/comments/4 , but hasn't been articulated or resolved.

I compared packages in security and updates and found significant differencies:
1. [debian/pymindeps.py] subprocess key in excluded_imports is threading in security and dummy_threading in updates.
2. [debian/PVER-minimal.README.Debian.in] Information about threading module differs.

I made patch libpython3.4-minimal_3.4.0-2ubuntu1.1custompatch1.patch and applied to python3.4_3.4.0-2ubuntu1.1 . The result is available in https://launchpad.net/~bugchecker/+archive/ubuntu/python3-threading-trusty-sec . This patch may be incorrect but it works for me.

Also I attached docker context for any experiments.

[Ubuntu Foundations Team Bug Bot (crichton)]

The attachment "libpython3.4-minimal_3.4.0-2ubuntu1.1custompatch1.patch" seems to be a debdiff. The ubuntu-sponsors team has been subscribed to the bug report so that they can review and hopefully sponsor the debdiff. If the attachment isn't a patch, please remove the "patch" flag from the attachment, remove the "patch" tag, and if you are member of the ~ubuntu-sponsors, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issue please contact him.]

[Marc Deslauriers (mdeslaur)]

I can't reproduce this issue at all. The threading module definitely is in the libpython3.4-stdlib package, for both the release pocket, and the -security pocket:

$ dpkg -c libpython3.4-stdlib_3.4.0-2ubuntu1_amd64.deb | grep threading.py
-rw-r--r-- root/root 48898 2014-04-11 10:13 ./usr/lib/python3.4/threading.py
-rw-r--r-- root/root 2815 2014-04-11 10:13 ./usr/lib/python3.4/dummy_threading.py

$ dpkg -c libpython3.4-stdlib_3.4.0-2ubuntu1.1_amd64.deb | grep threading.py
-rw-r--r-- root/root 2815 2015-06-19 11:33 ./usr/lib/python3.4/dummy_threading.py
-rw-r--r-- root/root 48898 2015-06-19 11:33 ./usr/lib/python3.4/threading.py

I've attempted to reproduce using the steps in the bug description, but it's working fine for me in a newly-installed trusty VM.

I'm not sure why you're seeing this issue. Your log file seems to indicate you have the libpython3.4-stdlib package installed, but the threading.py file is missing in your /usr/lib/python3.4 directory. That seems to be an issue in your environment, as that file is definitely in the package.

Are you able to reproduce this with a cleanly installed VM?

[Martin Pitt (pitti)]

Unsubscribing sponsors while this is being investigated. Please re-subscribe once there's an agreed-upon patch.

[bugchecker (bugchecker)]

I found that apt cannot downgrade stdlib package. Only dpkg installation works. I don't know maybe it is apt bug. I reproduce it with a cleanly installed VM.

[Launchpad Janitor (janitor)]

[Expired for python3.4 (Ubuntu) because there has been no activity for 60 days.]