package python-oneconf 0.3.8 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 127

[Ketan Barad]

here are some outputs :

$sudo dpkg --audit
The following packages are in a mess due to serious problems during
installation. They must be reinstalled for them (and any packages
that depend on them) to function properly:
python-oneconf synchronize your configuration data over the network (Pyt

The following packages are only half configured, probably due to problems
configuring them the first time. The configuration should be retried using
dpkg --configure <package> or the configure menu option in dselect:
 software-center Utility for browsing, installing, and removing software
 software-center-aptdaemon-plugins The aptdaemon plugins for software-center

And

$sudo dpkg --configure python-oneconf
dpkg: error processing package python-oneconf (--configure):
package is in a very bad inconsistent state; you should
 reinstall it before attempting configuration
Errors were encountered while processing:
python-oneconf

And

$ sudo apt-get -f install
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
  linux-headers-3.13.0-59 linux-headers-3.13.0-59-generic
  linux-headers-3.16.0-44 linux-headers-3.16.0-44-generic
  linux-image-3.13.0-59-generic linux-image-3.16.0-44-generic
  linux-image-extra-3.13.0-59-generic linux-image-extra-3.16.0-44- generic
  linux-signed-image-3.16.0-44-generic
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
3 not fully installed or removed.
Need to get 19,6 kB of archives.
After this operation, 0 B of additional disk space will be used.
Get:1 http://de.archive.ubuntu.com/ubuntu/ trusty/main python-oneconf all 0.3.7 [19,6 kB]
Fetched 19,6 kB in 0s (151 kB/s)
Setting up software-center-aptdaemon-plugins (0.1.6build1) ...
/var/lib/dpkg/info/software-center-aptdaemon-plugins.postinst: 6: /var/lib/dpkg/info/software-center-aptdaemon-plugins.postinst: pycompile: not found
dpkg: error processing package software-center-aptdaemon-plugins (-- configure):
 subprocess installed post-installation script returned error exit status 127
dpkg: error processing package python-oneconf (--configure):
 package is in a very bad inconsistent state; you should
 reinstall it before attempting configuration
dpkg: dependency problems prevent configuration of software-center:
 software-center depends on software-center-aptdaemon-plugins; however:
  Package software-center-aptdaemon-plugins is not configured yet.
 software-center depends on python-oneconf (>= 0.3) | oneconf (<< 0.3); however:
  Package python-oneconf is not configured yet.
  Version of oneconf on system is 0.3.7.14.04.1.

dpkg: error processing package software-center (--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:
 software-center-aptdaemon-plugins
 python-oneconf
 software-center
E: Sub-process /usr/bin/dpkg returned an error code (1)

And

$ sudo apt-get remove --purge python-oneconf
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
  gir1.2-gmenu-3.0 laptop-detect linux-headers-3.13.0-59
  linux-headers-3.13.0-59-generic linux-headers-3.16.0-44
  linux-headers-3.16.0-44-generic linux-image-3.13.0-59-generic
  linux-image-3.16.0-44-generic linux-image-extra-3.13.0-59-generic
  linux-image-extra-3.16.0-44-generic linux-signed-image-3.16.0-44- generic
  oneconf oneconf-common python-debtagshw python3-oneconf
  python3-piston-mini-client ubuntu-extras-keyring
Use 'apt-get autoremove' to remove them.
The following packages will be REMOVED:
  python-oneconf* software-center*
0 upgraded, 0 newly installed, 2 to remove and 0 not upgraded.
3 not fully installed or removed.
After this operation, 3.161 kB disk space will be freed.
Do you want to continue? [Y/n] y
(Reading database ... 414542 files and directories currently installed.)
Removing software-center (13.10-0ubuntu4.1) ...
/var/lib/dpkg/info/software-center.prerm: 6: /var/lib/dpkg/info/software-center.prerm: pyclean: not found
dpkg: error processing package software-center (--purge):
 subprocess installed pre-removal script returned error exit status 127
/var/lib/dpkg/info/software-center.postinst: 8: /var/lib/dpkg/info/software-center.postinst: pycompile: not found
dpkg: error while cleaning up:
 subprocess installed post-installation script returned error exit status 127
dpkg: error processing package python-oneconf (--purge):
 package is in a very bad inconsistent state; you should
 reinstall it before attempting a removal
Errors were encountered while processing:
 software-center
 python-oneconf
E: Sub-process /usr/bin/dpkg returned an error code (1)
A
$python --version
Python 2.7.10

$python3 --version
Python 3.4.3

ProblemType: Package
DistroRelease: Ubuntu 15.10
Package: python-oneconf 0.3.8
ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3
Uname: Linux 4.2.0-18-generic x86_64
ApportVersion: 2.19.1-0ubuntu5
AptOrdering:
 software-center: Purge
 python-oneconf: Purge
 software-center-aptdaemon-plugins: Configure
 NULL: ConfigurePending
Architecture: amd64
Date: Thu Feb 18 18:12:33 2016
DuplicateSignature: package:python-oneconf:0.3.8:subprocess installed pre-removal script returned error exit status 127
ErrorMessage: subprocess installed pre-removal script returned error exit status 127
InstallationDate: Installed on 2015-07-24 (208 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
PackageArchitecture: all
RelatedPackageVersions:
 dpkg 1.18.2ubuntu5
 apt 1.0.10.2ubuntu1
SourcePackage: oneconf
Title: package python-oneconf 0.3.8 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 127
UpgradeStatus: Upgraded to wily on 2015-10-23 (118 days ago)

[Steve Beattie (sbeattie)]

Thanks for taking the time to report this bug and helping to make Ubuntu better. We appreciate the difficulties you are facing, but this appears to be a "regular" (non-security) bug. I have unmarked it as a security issue since this bug does not show evidence of allowing attackers to cross privilege boundaries nor directly cause loss of data/privacy. Please feel free to report any other bugs you may find.