[Bug 1742378] [NEW] Slight glitch in /etc/cron.daily/apt-compat Ubuntu 16.04.3 in apt-1.2.24

[rklemme]

Public bug reported:

I accidentally stumbled across this. If in line 22 on_ac_power returns a
non zero exit code the next line is never reached. Instead, the shell
terminates immediately with that non zero exit code because of "set -e"
in line 3. In this script it does not pose a problem because the shell
is asked to exit anyway if check_power() returns non zero but it works
differently than is apparently intended (concluding from the logic).

I will attach a suggest patch and a demo illustrating that the patch
works as the original script seems to intend to.

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

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https://bugs.launchpad.net/bugs/1742378

Title:
  Slight glitch in /etc/cron.daily/apt-compat Ubuntu 16.04.3 in
  apt-1.2.24

Status in apt package in Ubuntu:
  New

Bug description:
  I accidentally stumbled across this. If in line 22 on_ac_power returns
  a non zero exit code the next line is never reached. Instead, the
  shell terminates immediately with that non zero exit code because of
  "set -e" in line 3. In this script it does not pose a problem because
  the shell is asked to exit anyway if check_power() returns non zero
  but it works differently than is apparently intended (concluding from
  the logic).

  I will attach a suggest patch and a demo illustrating that the patch
  works as the original script seems to intend to.

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