[Bug 1866844] Re: package libc6:amd64 2.31-0ubuntu3 failed to install/upgrade: installed libc6:amd64 package post-installation script subprocess returned error exit status 127

[John Feole]

*** This bug is a duplicate of bug 1867431 ***
    https://bugs.launchpad.net/bugs/1867431

This bug caused me to lose 3 desktops in rapid succession when they
upgraded yesterday.

Like others,after finding this bug, and using comments 12 and 13, and
the livecd boot, was able to recover all 3 of them..after hours of
wasted time.

I am an Ubuntu user from the earliest revisions, and wonder, how was this released in this
state? As right when it installs, it disables the desktop, and when you reboot, login is broken.. Was it even tested??

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https://bugs.launchpad.net/bugs/1866844

Title:
  package libc6:amd64 2.31-0ubuntu3 failed to install/upgrade: installed
  libc6:amd64 package post-installation script subprocess returned error
  exit status 127

Status in glibc package in Ubuntu:
  Fix Released
Status in glibc source package in Focal:
  Fix Released

Bug description:
  
  cannot install this package

  ProblemType: Package
  DistroRelease: Ubuntu 20.04
  Package: libc6:amd64 2.31-0ubuntu3
  ProcVersionSignature: Ubuntu 5.4.0-14.17-generic 5.4.18
  Uname: Linux 5.4.0-14-generic x86_64
  ApportVersion: 2.20.11-0ubuntu19
  Architecture: amd64
  Date: Tue Mar 10 09:39:56 2020
  DuplicateSignature:
   package:libc6:amd64:2.31-0ubuntu3
   Setting up libc6:amd64 (2.31-0ubuntu3) ...
   /usr/bin/perl: error while loading shared libraries: libcrypt.so.1: cannot open shared object file: No such file or directory
   dpkg: error processing package libc6:amd64 (--configure):
    installed libc6:amd64 package post-installation script subprocess returned error exit status 127
  ErrorMessage: installed libc6:amd64 package post-installation script subprocess returned error exit status 127
  InstallationDate: Installed on 2020-03-07 (2 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Alpha amd64 (20200304)
  Python3Details: /usr/bin/python3.8, Python 3.8.2, python3-minimal, 3.8.2-0ubuntu1
  PythonDetails: N/A
  RelatedPackageVersions:
   dpkg 1.19.7ubuntu2
   apt  2.0.0
  SourcePackage: glibc
  Title: package libc6:amd64 2.31-0ubuntu3 failed to install/upgrade: installed libc6:amd64 package post-installation script subprocess returned error exit status 127
  UpgradeStatus: No upgrade log present (probably fresh install)

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