[Bug 2000478] Re: package usrmerge 25ubuntu2 failed to install/upgrade: installed usrmerge package post-installation script subprocess returned error exit status 255

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** Tags removed: need-duplicate-check

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Title:
  package usrmerge 25ubuntu2 failed to install/upgrade: installed
  usrmerge package post-installation script subprocess returned error
  exit status 255

Status in usrmerge package in Ubuntu:
  New

Bug description:
  Trying to upgrade from 20.04 to 22.04

  usrmerge doesn't have enough space in /usr and/or /var - the pre-
  upgrade checks should anticipate this.

  =====
  Could not install the upgrades

  The upgrade has aborted. Your system could be in an unusable state. A
  recovery will run now (dpkg --configure -a).

  Setting up usrmerge (25ubuntu2) ...
  Smartmatch is experimental at /usr/lib/usrmerge/convert-usrmerge line 172.
  1766740 KB in /usr but 2116336 KB are required!
  dpkg: error processing package usrmerge (--configure):
   installed usrmerge package post-installation script subprocess returned error exit status 255
  Errors were encountered while processing:
   usrmerge

  Upgrade complete

  The upgrade has completed but there were errors during the upgrade
  process.
  =====

  =====
  # dpkg --configure -a
  Setting up usrmerge (25ubuntu2) ...
  Smartmatch is experimental at /usr/lib/usrmerge/convert-usrmerge line 172.
  1767220 KB in /usr but 2116336 KB are required!
  dpkg: error processing package usrmerge (--configure):
   installed usrmerge package post-installation script subprocess returned error exit status 255
  Errors were encountered while processing:
   usrmerge
  =====

  This requires non-trivial file system resizing that ordinary users
  won't be able to manage without help.

  This shouldn't happen.

  Fortunately, I have enough space in my LVM system. I can shrink /home
  to free up space for increasing the size of /usr - but other might not
  have that luxury:

  root at christina:~# df -h
  Filesystem               Size  Used Avail Use% Mounted on
  tmpfs                    796M  1.4M  795M   1% /run
  /dev/mapper/vg00-rootlv  3.8G  2.2G  1.5G  60% /
  /dev/mapper/vg00-usrlv   6.6G  4.9G  1.4G  79% /usr
  tmpfs                    3.9G     0  3.9G   0% /dev/shm
  tmpfs                    5.0M     0  5.0M   0% /run/lock
  tmpfs                    3.9G     0  3.9G   0% /sys/fs/cgroup
  /dev/mapper/vg00-varlv   9.5G  7.1G  2.1G  78% /var
  /dev/vda1                921M  244M  614M  29% /boot
  tmpfs                    796M   36K  796M   1% /run/user/131
  tmpfs                    796M     0  796M   0% /run/user/1000
  /dev/mapper/vg00-homelv   75G   48G   24G  68% /home

  ProblemType: Package
  DistroRelease: Ubuntu 22.04
  Package: usrmerge 25ubuntu2
  ProcVersionSignature: Ubuntu 5.4.0-135.152-generic 5.4.212
  Uname: Linux 5.4.0-135-generic x86_64
  ApportVersion: 2.20.11-0ubuntu82.3
  Architecture: amd64
  CasperMD5CheckResult: unknown
  Date: Mon Dec 26 14:41:48 2022
  ErrorMessage: installed usrmerge package post-installation script subprocess returned error exit status 255
  InstallationDate: Installed on 2013-04-18 (3539 days ago)
  InstallationMedia: Ubuntu-Server 12.04 LTS "Precise Pangolin" - Release amd64 (20120424.1)
  PackageArchitecture: all
  Python3Details: /usr/bin/python3.10, Python 3.10.6, python3-minimal, 3.10.6-1~22.04
  PythonDetails: N/A
  RebootRequiredPkgs: Error: path contained symlinks.
  RelatedPackageVersions:
   dpkg 1.21.1ubuntu2.1
   apt  2.4.8
  SourcePackage: usrmerge
  Title: package usrmerge 25ubuntu2 failed to install/upgrade: installed usrmerge package post-installation script subprocess returned error exit status 255
  UpgradeStatus: Upgraded to jammy on 2022-12-26 (0 days ago)

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