[Bug 1959019] Re: package gfortran 4:9.3.0-1ubuntu2 failed to install/upgrade: installed gfortran package post-installation script subprocess returned error exit status 2

[Seth Arnold]

** Information type changed from Private Security to Public

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Title:
  package gfortran 4:9.3.0-1ubuntu2 failed to install/upgrade: installed
  gfortran package post-installation script subprocess returned error
  exit status 2

Status in gcc-defaults package in Ubuntu:
  New

Bug description:
  I got a problem with gfortran, and doesn't allow me install any
  program:

  "Found erros with: Gfortran"
  Additional:
  E: Sub-process /usr/bin/dpkg returned an error code (1)

  ProblemType: Package
  DistroRelease: Ubuntu 20.04
  Package: gfortran 4:9.3.0-1ubuntu2
  ProcVersionSignature: Ubuntu 5.4.0-96.109-generic 5.4.157
  Uname: Linux 5.4.0-96-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu27.21
  Architecture: amd64
  CasperMD5CheckResult: skip
  Date: Mon Jan 24 19:44:39 2022
  DuplicateSignature:
   package:gfortran:4:9.3.0-1ubuntu2
   Setting up gfortran (4:9.3.0-1ubuntu2) ...
   update-alternatives: error: cannot stat file '/etc/alternatives/f95': Invalid argument
   dpkg: error processing package gfortran (--configure):
    installed gfortran package post-installation script subprocess returned error exit status 2
  ErrorMessage: installed gfortran package post-installation script subprocess returned error exit status 2
  InstallationDate: Installed on 2017-02-11 (1808 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  Python3Details: /usr/bin/python3.8, Python 3.8.10, python3-minimal, 3.8.2-0ubuntu2
  PythonDetails: /usr/bin/python2.7, Python 2.7.18, python-is-python2, 2.7.17-4
  RelatedPackageVersions:
   dpkg 1.19.7ubuntu3
   apt  2.0.6
  SourcePackage: gcc-defaults
  Title: package gfortran 4:9.3.0-1ubuntu2 failed to install/upgrade: installed gfortran package post-installation script subprocess returned error exit status 2
  UpgradeStatus: Upgraded to focal on 2022-01-25 (0 days ago)

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