[Bug 1692175] Re: package grub-efi-amd64 2.02~beta2-36ubuntu3.10 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2

[DorianDaumiller]

from the changelog of grub-pc ... 3.10:

2017-05-19 - Mathieu Trudel-Lapierre <cyphermox at ubuntu.com> grub2
(2.02~beta2-36ubuntu3.10) xenial; urgency=medium *
debian/patches/install_signed.patch: don't install fb$arch.efi; it
breaks "removable" installs where files are all installed to /EFI/BOOT;
and it also doesn't belong in the /EFI/ubuntu path for the default case.
Fallback install simply needs more work and isn't ready for SRU. (LP:
#1684341) * debian/postinst.in: clean up fb$arch.efi.

(source: https://ubuntu.pkgs.org/16.04/ubuntu-proposed-main-i386/grub-
pc_2.02~beta2-36ubuntu3.10_i386.deb.html)

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Title:
  package grub-efi-amd64 2.02~beta2-36ubuntu3.10 failed to
  install/upgrade: subprocess installed post-installation script
  returned error exit status 2

Status in grub2 package in Ubuntu:
  Confirmed

Bug description:
  I am new to this environment, I don't know what this bug is supposed
  to mean.

  ProblemType: Package
  DistroRelease: Ubuntu 16.04
  Package: grub-efi-amd64 2.02~beta2-36ubuntu3.10
  ProcVersionSignature: Ubuntu 4.8.0-53.56~16.04.1-generic 4.8.17
  Uname: Linux 4.8.0-53-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.6
  Architecture: amd64
  Date: Sat May 20 10:58:33 2017
  DuplicateSignature:
   package:grub-efi-amd64:2.02~beta2-36ubuntu3.10
   Setting up grub-efi-amd64 (2.02~beta2-36ubuntu3.10) ...
   /var/lib/dpkg/info/grub-efi-amd64.postinst: line 703: syntax error near unexpected token `fi'
   dpkg: error processing package grub-efi-amd64 (--configure):
    subprocess installed post-installation script returned error exit status 2
  ErrorMessage: subprocess installed post-installation script returned error exit status 2
  InstallationDate: Installed on 2016-10-27 (205 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  InvalidGrubScript: /etc/grub.d/25_custom
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-53-generic root=UUID=f8b0836b-d65f-4dd1-bc20-6c42b8e1009f ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   dpkg 1.18.4ubuntu1.2
   apt  1.2.20
  SourcePackage: grub2
  Title: package grub-efi-amd64 2.02~beta2-36ubuntu3.10 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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