[Bug 1830445] [NEW] package python3.6 3.6.8-1~18.10 failed to install/upgrade: installed python3.6 package post-installation script subprocess returned error exit status 127

[Harel Malka]

Public bug reported:

This is after a reinstall of python 3.6. 
The reason this was reinstalled is trying to fix an upgrade error with do-release-upgrade (or with the gui) resulting in a python3 symlink corrupted error. This is with default python 3.6 of ubuntu 18.10. 


$ lsb_release -rd
Description:	Ubuntu 18.10
Release:	18.10


$ apt-cache policy python3.6
python3.6:
  Installed: 3.6.8-1~18.10
  Candidate: 3.6.8-1~18.10
  Version table:
 *** 3.6.8-1~18.10 500
        500 http://gb.archive.ubuntu.com/ubuntu cosmic-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     3.6.7~rc1-1 500
        500 http://gb.archive.ubuntu.com/ubuntu cosmic/main amd64 Packages


This happened without any intervention from me - just a random error and report request. 
However, this is the result of what is described above and in more details: 


1. Attempted to upgrade to 19.04 via software centre and cmd line, always with this error: 

Reading cache

Checking package manager

Cannot upgrade

Your python3 install is corrupted. Please fix the '/usr/bin/python3' 
symlink. 


Note that python3 is the default 3.6, it was never changed. Symlink was fine. 

Followed good and bad advice. Last one was the first comment here;
https://dev1galaxy.org/viewtopic.php?id=649

The result was a messed up python symlink, which overwrote the binary.

Removed, reinstalled and this error just popped up. Technically so far
things work though but i still cannot upgrade.

ProblemType: Package
DistroRelease: Ubuntu 18.10
Package: python3.6 3.6.8-1~18.10
ProcVersionSignature: Ubuntu 4.18.0-18.19-generic 4.18.20
Uname: Linux 4.18.0-18-generic x86_64
ApportVersion: 2.20.10-0ubuntu13.3
AptOrdering:
 python3.6:amd64: Install
 NULL: ConfigurePending
Architecture: amd64
Date: Fri May 24 17:24:14 2019
DuplicateSignature:
 package:python3.6:3.6.8-1~18.10
 Setting up python3.6 (3.6.8-1~18.10) ...
 /var/lib/dpkg/info/python3.6.postinst: 9: /var/lib/dpkg/info/python3.6.postinst: /usr/bin/python3.6: not found
 dpkg: error processing package python3.6 (--configure):
  installed python3.6 package post-installation script subprocess returned error exit status 127
ErrorMessage: installed python3.6 package post-installation script subprocess returned error exit status 127
InstallationDate: Installed on 2018-12-15 (160 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
Python3Details: /usr/bin/python3, Python 3.6.7, python3-minimal, 3.6.7-1~18.10
PythonDetails: /usr/bin/python3, Python 3.6.7, python-minimal, 2.7.15-3
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu5
 apt  1.7.4
SourcePackage: python3.6
Title: package python3.6 3.6.8-1~18.10 failed to install/upgrade: installed python3.6 package post-installation script subprocess returned error exit status 127
UpgradeStatus: Upgraded to cosmic on 2019-05-24 (0 days ago)

** Affects: python3.6 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-package cosmic

-- 
You received this bug notification because you are a member of Ubuntu
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https://bugs.launchpad.net/bugs/1830445

Title:
  package python3.6 3.6.8-1~18.10 failed to install/upgrade: installed
  python3.6 package post-installation script subprocess returned error
  exit status 127

Status in python3.6 package in Ubuntu:
  New

Bug description:
  This is after a reinstall of python 3.6. 
  The reason this was reinstalled is trying to fix an upgrade error with do-release-upgrade (or with the gui) resulting in a python3 symlink corrupted error. This is with default python 3.6 of ubuntu 18.10. 

  
  $ lsb_release -rd
  Description:	Ubuntu 18.10
  Release:	18.10

  
  $ apt-cache policy python3.6
  python3.6:
    Installed: 3.6.8-1~18.10
    Candidate: 3.6.8-1~18.10
    Version table:
   *** 3.6.8-1~18.10 500
          500 http://gb.archive.ubuntu.com/ubuntu cosmic-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       3.6.7~rc1-1 500
          500 http://gb.archive.ubuntu.com/ubuntu cosmic/main amd64 Packages


  This happened without any intervention from me - just a random error and report request. 
  However, this is the result of what is described above and in more details: 

  
  1. Attempted to upgrade to 19.04 via software centre and cmd line, always with this error: 

  Reading cache

  Checking package manager

  Cannot upgrade

  Your python3 install is corrupted. Please fix the '/usr/bin/python3' 
  symlink. 

  
  Note that python3 is the default 3.6, it was never changed. Symlink was fine. 

  Followed good and bad advice. Last one was the first comment here;
  https://dev1galaxy.org/viewtopic.php?id=649

  The result was a messed up python symlink, which overwrote the binary.

  Removed, reinstalled and this error just popped up. Technically so far
  things work though but i still cannot upgrade.

  ProblemType: Package
  DistroRelease: Ubuntu 18.10
  Package: python3.6 3.6.8-1~18.10
  ProcVersionSignature: Ubuntu 4.18.0-18.19-generic 4.18.20
  Uname: Linux 4.18.0-18-generic x86_64
  ApportVersion: 2.20.10-0ubuntu13.3
  AptOrdering:
   python3.6:amd64: Install
   NULL: ConfigurePending
  Architecture: amd64
  Date: Fri May 24 17:24:14 2019
  DuplicateSignature:
   package:python3.6:3.6.8-1~18.10
   Setting up python3.6 (3.6.8-1~18.10) ...
   /var/lib/dpkg/info/python3.6.postinst: 9: /var/lib/dpkg/info/python3.6.postinst: /usr/bin/python3.6: not found
   dpkg: error processing package python3.6 (--configure):
    installed python3.6 package post-installation script subprocess returned error exit status 127
  ErrorMessage: installed python3.6 package post-installation script subprocess returned error exit status 127
  InstallationDate: Installed on 2018-12-15 (160 days ago)
  InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
  Python3Details: /usr/bin/python3, Python 3.6.7, python3-minimal, 3.6.7-1~18.10
  PythonDetails: /usr/bin/python3, Python 3.6.7, python-minimal, 2.7.15-3
  RelatedPackageVersions:
   dpkg 1.19.0.5ubuntu5
   apt  1.7.4
  SourcePackage: python3.6
  Title: package python3.6 3.6.8-1~18.10 failed to install/upgrade: installed python3.6 package post-installation script subprocess returned error exit status 127
  UpgradeStatus: Upgraded to cosmic on 2019-05-24 (0 days ago)

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