[Bug 1871968] [NEW] package grub-efi-amd64-signed (1.139+2.04-1ubuntu24 fails to upgrade on 20.04

[dreamersbrow]

Public bug reported:

When attempting to install the latest version of grub-efi-amd64-signed
the update fails with the errors:

/var/lib/dpkg/info/grub-efi-amd64-signed.postinst: 23: Syntax error: word unexpected (expecting ")")
dpkg: error processing package grub-efi-amd64-signed (--configure):
 installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 2
Errors were encountered while processing:
 grub-efi-amd64-signed
E: Sub-process /usr/bin/dpkg returned an error code (1)

** Affects: grub-efi-amd64-signed (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: focal

** Package changed: shim-signed (Ubuntu) => grub-efi-amd64-signed
(Ubuntu)

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https://bugs.launchpad.net/bugs/1871968

Title:
  package grub-efi-amd64-signed (1.139+2.04-1ubuntu24 fails to upgrade
  on 20.04

Status in grub-efi-amd64-signed package in Ubuntu:
  New

Bug description:
  When attempting to install the latest version of grub-efi-amd64-signed
  the update fails with the errors:

  /var/lib/dpkg/info/grub-efi-amd64-signed.postinst: 23: Syntax error: word unexpected (expecting ")")
  dpkg: error processing package grub-efi-amd64-signed (--configure):
   installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 2
  Errors were encountered while processing:
   grub-efi-amd64-signed
  E: Sub-process /usr/bin/dpkg returned an error code (1)

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