[Bug 1822954] Re: package grub-pc 2.02-2ubuntu8.12 failed to install/upgrade: installed grub-pc package post-installation script subprocess returned error exit status 127

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** Tags removed: need-duplicate-check

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Title:
  package grub-pc 2.02-2ubuntu8.12 failed to install/upgrade: installed
  grub-pc package post-installation script subprocess returned error
  exit status 127

Status in grub2 package in Ubuntu:
  New

Bug description:
  bug

  ProblemType: Package
  DistroRelease: Ubuntu 18.04
  Package: grub-pc 2.02-2ubuntu8.12
  ProcVersionSignature: Ubuntu 4.15.0-43.46-generic 4.15.18
  Uname: Linux 4.15.0-43-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.9-0ubuntu7.6
  Architecture: amd64
  Date: Wed Apr  3 12:56:28 2019
  DuplicateSignature:
   package:grub-pc:2.02-2ubuntu8.12
   Setting up grub-pc (2.02-2ubuntu8.12) ...
   /var/lib/dpkg/info/grub-pc.config: 1: /etc/default/grub: If: not found
   dpkg: error processing package grub-pc (--configure):
    installed grub-pc package post-installation script subprocess returned error exit status 127
  ErrorMessage: installed grub-pc package post-installation script subprocess returned error exit status 127
  InstallationDate: Installed on 2019-01-07 (86 days ago)
  InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
  InvalidGrubScript: /etc/default/grub
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-43-generic root=UUID=28fe1d2f-c983-4bf9-9324-ec3c76ec690b ro quiet splash vt.handoff=1
  Python3Details: /usr/bin/python3.6, Python 3.6.7, python3-minimal, 3.6.7-1~18.04
  PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
  RelatedPackageVersions:
   dpkg 1.19.0.5ubuntu2.1
   apt  1.6.10
  SourcePackage: grub2
  Title: package grub-pc 2.02-2ubuntu8.12 failed to install/upgrade: installed grub-pc package post-installation script subprocess returned error exit status 127
  UpgradeStatus: No upgrade log present (probably fresh install)

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