[Bug 1871983] Re: grub-efi-amd64-signed.postinst: 23: Syntax error: word unexpected (expecting ")")

[Steve Langasek]

*** This bug is a duplicate of bug 1871963 ***
    https://bugs.launchpad.net/bugs/1871963

** This bug has been marked a duplicate of bug 1871963
   dpkg fails to install grub-efi-amd64 signed and shim-signed

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https://bugs.launchpad.net/bugs/1871983

Title:
  grub-efi-amd64-signed.postinst: 23: Syntax error: word unexpected
  (expecting ")")

Status in grub2 package in Ubuntu:
  Confirmed

Bug description:
  Focal update today of grub produced the following:

  https://paste.ubuntu.com/p/T7Y6CPKmSK/

  Setting up grub-efi-amd64-signed (1.139+2.04-1ubuntu24) ...
  /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

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