[Bug 1987179] [NEW] Upgrade from 20.04 to 22.04 crashes with fatal error

[Manish-Raj]

Public bug reported:

The upgrade fails with error "39.6226:installed libc6:amd64 package
post-installation script subprocess returned error exit status 127" .

Additional information :-
1) Output of lsb_release -rd :-
Description:	Ubuntu 20.04.4 LTS
Release:	20.04

2) ubuntu-release-upgrader-gtk version 1:20.04.38

3) Expected result : Upgrade to 22.04 should be without any error and in
case of any fatal error, the program should rollback the changes  to
original state.

4) Actual result : The upgrade fails with mentioned error and system is
left in unusable state. The installation has to be manually restored to
original state via recovery mode.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubuntu-release-upgrader-core 1:20.04.38
ProcVersionSignature: Ubuntu 5.15.0-46.49~20.04.1-generic 5.15.39
Uname: Linux 5.15.0-46-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.24
Architecture: amd64
CasperMD5CheckResult: skip
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Sun Aug 21 00:36:56 2022
DistributionChannelDescriptor:
 # This is the distribution channel descriptor for the OEM CDs
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-somerville-bionic-amd64-20180608-47+loki-n3-v3-kbl+X28
InstallationDate: Installed on 2019-08-17 (1099 days ago)
InstallationMedia: Ubuntu 18.04 "Bionic" - Build amd64 LIVE Binary 20180608-09:38
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_IN
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
Symptom: ubuntu-release-upgrader
UpgradeStatus: Upgraded to focal on 2022-08-20 (0 days ago)
VarLogDistupgradeTermlog:
 
mtime.conffile..etc.update-manager.release-upgrades: 2020-02-19T01:54:00.672958

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade focal third-party-packages

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https://bugs.launchpad.net/bugs/1987179

Title:
  Upgrade from 20.04 to 22.04 crashes with fatal error

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  The upgrade fails with error "39.6226:installed libc6:amd64 package
  post-installation script subprocess returned error exit status 127" .

  Additional information :-
  1) Output of lsb_release -rd :-
  Description:	Ubuntu 20.04.4 LTS
  Release:	20.04

  2) ubuntu-release-upgrader-gtk version 1:20.04.38

  3) Expected result : Upgrade to 22.04 should be without any error and
  in case of any fatal error, the program should rollback the changes
  to original state.

  4) Actual result : The upgrade fails with mentioned error and system
  is left in unusable state. The installation has to be manually
  restored to original state via recovery mode.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubuntu-release-upgrader-core 1:20.04.38
  ProcVersionSignature: Ubuntu 5.15.0-46.49~20.04.1-generic 5.15.39
  Uname: Linux 5.15.0-46-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.24
  Architecture: amd64
  CasperMD5CheckResult: skip
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Aug 21 00:36:56 2022
  DistributionChannelDescriptor:
   # This is the distribution channel descriptor for the OEM CDs
   # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
   canonical-oem-somerville-bionic-amd64-20180608-47+loki-n3-v3-kbl+X28
  InstallationDate: Installed on 2019-08-17 (1099 days ago)
  InstallationMedia: Ubuntu 18.04 "Bionic" - Build amd64 LIVE Binary 20180608-09:38
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_IN
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  Symptom: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to focal on 2022-08-20 (0 days ago)
  VarLogDistupgradeTermlog:
   
  mtime.conffile..etc.update-manager.release-upgrades: 2020-02-19T01:54:00.672958

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