[Bug 1788681] Re: changed exit code for 'dc' in Ubuntu Bionic

[Wladimir Mutel]

4 years passed, no movements in Bionic ...

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https://bugs.launchpad.net/bugs/1788681

Title:
  changed exit code for 'dc' in Ubuntu Bionic

Status in bc package in Ubuntu:
  Confirmed
Status in dphys-swapfile package in Ubuntu:
  Fix Released

Bug description:
  in Ubuntu Xenial :
  $ lsb_release -rdc ; echo 1 1 + p q | dc ; echo $?
  Description:    Ubuntu 16.04.4 LTS
  Release:        16.04
  Codename:       xenial
  2
  0

  in Ubuntu Bionic :
  $ lsb_release -rdc ; echo 1 1 + p q | dc ; echo $?
  Description:    Ubuntu 18.04.1 LTS
  Release:        18.04
  Codename:       bionic
  2
  1

  This change causes some scripts using 'dc' to fail, most importantly,
  'dphys-swapfile' which for some ironic reason uses 'dc' instead of
  'echo $((...))' for its calculations.

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