[Bug 1768605] Re: package grub-pc 2.02~beta3-4ubuntu7.3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2

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Title:
  package grub-pc 2.02~beta3-4ubuntu7.3 failed to install/upgrade:
  subprocess installed post-installation script returned error exit
  status 2

Status in grub2 package in Ubuntu:
  New

Bug description:
  package grub-pc 2.02~beta3-4ubuntu7.3 failed to install/upgrade:
  subprocess installed post-installation script returned error exit
  status 2

  ProblemType: Package
  DistroRelease: Ubuntu 17.10
  Package: grub-pc 2.02~beta3-4ubuntu7.3
  ProcVersionSignature: Ubuntu 4.13.0-32.35-generic 4.13.13
  Uname: Linux 4.13.0-32-generic x86_64
  ApportVersion: 2.20.7-0ubuntu3.8
  Architecture: amd64
  Date: Wed May  2 18:04:21 2018
  DpkgHistoryLog:
   Start-Date: 2018-05-02  18:03:21
   Commandline: aptdaemon role='role-commit-packages' sender=':1.71'
   Install: libwebpdemux2:amd64 (0.6.0-3, automatic)
   Upgrade: libgs9:amd64 (9.21~dfsg+1-0ubuntu3, 9.21~dfsg+1-0ubuntu3.1), libwavpack1:amd64 (5.1.0-2ubuntu0.2, 5.1.0-2ubuntu0.3), deja-dup:amd64 (36.3-0ubuntu0.1, 36.3-0ubuntu0.2), ghostscript:amd64 (9.21~dfsg+1-0ubuntu3, 9.21~dfsg+1-0ubuntu3.1), libwebkit2gtk-4.0-37:amd64 (2.18.6-0ubuntu0.17.10.1, 2.20.1-0ubuntu0.17.10.1), ghostscript-x:amd64 (9.21~dfsg+1-0ubuntu3, 9.21~dfsg+1-0ubuntu3.1), libgs9-common:amd64 (9.21~dfsg+1-0ubuntu3, 9.21~dfsg+1-0ubuntu3.1), gir1.2-webkit2-4.0:amd64 (2.18.6-0ubuntu0.17.10.1, 2.20.1-0ubuntu0.17.10.1), libjavascriptcoregtk-4.0-18:amd64 (2.18.6-0ubuntu0.17.10.1, 2.20.1-0ubuntu0.17.10.1), gir1.2-javascriptcoregtk-4.0:amd64 (2.18.6-0ubuntu0.17.10.1, 2.20.1-0ubuntu0.17.10.1)
  ErrorMessage: subprocess installed post-installation script returned error exit status 2
  InstallationDate: Installed on 2018-02-10 (81 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20180105.1)
  InvalidGrubScript: /etc/default/grub
  ProcCmdLine: BOOT_IMAGE=/vmlinuz-4.13.0-32-generic root=UUID=da09f8b6-8c82-4f31-97c3-8f72420f9fc4 ro quiet splashi8042.nomux=1
  Python3Details: /usr/bin/python3.6, Python 3.6.3, python3-minimal, 3.6.3-0ubuntu2
  PythonDetails: /usr/bin/python2.7, Python 2.7.14, python-minimal, 2.7.14-2ubuntu1
  RelatedPackageVersions:
   dpkg 1.18.24ubuntu1
   apt  1.5.1
  SourcePackage: grub2
  Title: package grub-pc 2.02~beta3-4ubuntu7.3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2
  UpgradeStatus: No upgrade log present (probably fresh install)

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