Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: python2.7 (Ubuntu Xenial)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1682934
Title:
python3 in /usr/local/bin can cause python3 packages to fail to
install
Status in python2.7 package in Ubuntu:
Fix Released
Status in python3.5 package in Ubuntu:
Fix Released
Status in python2.7 source package in Xenial:
Confirmed
Status in python3.5 source package in Xenial:
Fix Released
Status in python2.7 source package in Zesty:
Confirmed
Status in python3.5 source package in Zesty:
Fix Released
Status in python3.5 package in Debian:
Fix Released
Bug description:
[Impact]
An upgrade of python3.5 will fail if someone has installed a different
version of python3.5 in their path e.g. in /usr/local/bin. This is because the
postinst scripts do not specify the complete path to python3.5.
[Test Case]
1) Ensure the version of python3.5 from the release pocket is installed
2) Install python3 using the instructions at
https://passingcuriosity.com/2015/installing-python-from-source/
3) Confirm that python3.5 from /usr/local/bin/ is being used / the default
4) Upgrade to a newer version of python3.5 from -proposed
Observe the following Traceback:
Setting up python3.5-minimal (3.5.3-1) ...
Traceback (most recent call last):
File "/usr/lib/python3.5/py_compile.py", line 6, in <module>
import importlib._bootstrap_external
File "/usr/lib/python3.5/importlib/__init__.py", line 57, in <module>
import types
File "/usr/lib/python3.5/types.py", line 166, in <module>
import functools as _functools
File "/usr/lib/python3.5/functools.py", line 23, in <module>
from weakref import WeakKeyDictionary
File "/usr/lib/python3.5/weakref.py", line 12, in <module>
from _weakref import (
ImportError: cannot import name '_remove_dead_weakref'
dpkg: error processing package python3.5-minimal (--configure):
subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of python3-minimal:
python3-minimal depends on python3.5-minimal (>= 3.5.3-1~); however:
Package python3.5-minimal is not configured yet.
dpkg: error processing package python3-minimal (--configure):
dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup
error from a previous failure.
Errors were encountered while processing:
python3.5-minimal
python3-minimal
With the version of python3.5 from -proposed this Traceback will not
be encountered.
[Regression Potential]
It's possible I missed a postinst script so other python3.5 binary packages
should be installed to ensure they are all fixed e.g. python3.5-dbg.
[Original Description]
Got this error while using "Transmageddon Video Transcoder" and again while
updating 16.10 to 17.04.
Seems to have something to do with needing that Python3 version for
Teletext decoding in media that is in transport stream format (.ts).
ProblemType: PackageDistroRelease: Ubuntu 17.04
Package: python3 3.5.1-4
ProcVersionSignature: Ubuntu 4.10.0-19.21-generic 4.10.8
Uname: Linux 4.10.0-19-generic x86_64
ApportVersion: 2.20.4-0ubuntu4
Architecture: amd64
Date: Fri Apr 14 19:27:33 2017
ErrorMessage: pre-dependency problem - not installing python3
InstallationDate: Installed on 2015-05-01 (714 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
RelatedPackageVersions:
dpkg 1.18.10ubuntu2
apt 1.4SourcePackage: python3-defaults
Title: package python3 3.5.1-4 failed to install/upgrade: pre-dependency
problem - not installing python3
UpgradeStatus: Upgraded to zesty on 2017-04-14 (0 days ago)
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