[Bug 1919121] [NEW] /usr/bin/grub-editenv: error: invalid environment block.

[Paul Menzel]

Public bug reported:

Upgrading GRUB on a ppc64le machine (8335-GCA (IBM Power System S822LC))

    2021-03-15 08:20:23 upgrade grub-common:ppc64el 2.04-1ubuntu26.8
2.04-1ubuntu26.11

`grub-initrd-fallback.service` failed to restart.

```
$ sudo journalctl -xe
[…]
Mar 15 08:20:30 s822lc grub-editenv[2481630]: /usr/bin/grub-editenv: error: invalid environment block.
Mar 15 08:20:30 s822lc systemd[1]: grub-initrd-fallback.service: Main process exited, code=exited, status=1/FAILURE
-- Subject: Unit process exited
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
-- 
-- An ExecStart= process belonging to unit grub-initrd-fallback.service has exited.
-- 
-- The process' exit code is 'exited' and its exit status is 1.
Mar 15 08:20:30 s822lc systemd[1]: grub-initrd-fallback.service: Failed with result 'exit-code'.
-- Subject: Unit failed
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
-- 
-- The unit grub-initrd-fallback.service has entered the 'failed' state with result 'exit-code'.
Mar 15 08:20:30 s822lc systemd[1]: Failed to start GRUB failed boot detection.
-- Subject: A start job for unit grub-initrd-fallback.service has failed
```

** Affects: grub2 (Ubuntu)
     Importance: Undecided
         Status: New

-- 
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https://bugs.launchpad.net/bugs/1919121

Title:
  /usr/bin/grub-editenv: error: invalid environment block.

Status in grub2 package in Ubuntu:
  New

Bug description:
  Upgrading GRUB on a ppc64le machine (8335-GCA (IBM Power System
  S822LC))

      2021-03-15 08:20:23 upgrade grub-common:ppc64el 2.04-1ubuntu26.8
  2.04-1ubuntu26.11

  `grub-initrd-fallback.service` failed to restart.

  ```
  $ sudo journalctl -xe
  […]
  Mar 15 08:20:30 s822lc grub-editenv[2481630]: /usr/bin/grub-editenv: error: invalid environment block.
  Mar 15 08:20:30 s822lc systemd[1]: grub-initrd-fallback.service: Main process exited, code=exited, status=1/FAILURE
  -- Subject: Unit process exited
  -- Defined-By: systemd
  -- Support: http://www.ubuntu.com/support
  -- 
  -- An ExecStart= process belonging to unit grub-initrd-fallback.service has exited.
  -- 
  -- The process' exit code is 'exited' and its exit status is 1.
  Mar 15 08:20:30 s822lc systemd[1]: grub-initrd-fallback.service: Failed with result 'exit-code'.
  -- Subject: Unit failed
  -- Defined-By: systemd
  -- Support: http://www.ubuntu.com/support
  -- 
  -- The unit grub-initrd-fallback.service has entered the 'failed' state with result 'exit-code'.
  Mar 15 08:20:30 s822lc systemd[1]: Failed to start GRUB failed boot detection.
  -- Subject: A start job for unit grub-initrd-fallback.service has failed
  ```

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