[Bug 1836289] Re: package grub-pc 2.02+dfsg1-12ubuntu3 failed to install/upgrade: installed grub-pc package post-installation script subprocess returned error exit status 1

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** Tags removed: need-duplicate-check

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Title:
  package grub-pc 2.02+dfsg1-12ubuntu3 failed to install/upgrade:
  installed grub-pc package post-installation script subprocess returned
  error exit status 1

Status in grub2 package in Ubuntu:
  New

Bug description:
  during do-release-upgrade --devel from disco.  base system was a raid
  1 btrfs on two drives.

  ProblemType: Package
  DistroRelease: Ubuntu 19.10
  Package: grub-pc 2.02+dfsg1-12ubuntu3
  ProcVersionSignature: Ubuntu 5.0.0-20.21-generic 5.0.8
  Uname: Linux 5.0.0-20-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu3
  Architecture: amd64
  Date: Thu Jul 11 21:24:56 2019
  ErrorMessage: installed grub-pc package post-installation script subprocess returned error exit status 1
  InstallationDate: Installed on 2018-11-04 (249 days ago)
  InstallationMedia: Lubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.2)
  ProcCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-5.0.0-20-generic root=UUID=52b46f84-d504-4f35-95d5-f9c73ed3d001 ro rootflags=subvol=@ resume=UUID=5408cfaa-8e4c-45b3-8b4e-971b0196043c
  Python3Details: /usr/bin/python3.7, Python 3.7.4rc2, python3-minimal, 3.7.3-1
  PythonDetails: /usr/bin/python2.7, Python 2.7.16, python-minimal, 2.7.16-1
  RelatedPackageVersions:
   dpkg 1.19.6ubuntu1
   apt  1.9.1
  SourcePackage: grub2
  Title: package grub-pc 2.02+dfsg1-12ubuntu3 failed to install/upgrade: installed grub-pc package post-installation script subprocess returned error exit status 1
  UpgradeStatus: Upgraded to eoan on 2019-07-12 (0 days ago)

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