[Bug 1532855] Update Released

[Steve Langasek]

The verification of the Stable Release Update for software-properties
has completed successfully and the package has now been released to
-updates.  Subsequently, the Ubuntu Stable Release Updates Team is being
unsubscribed and will not receive messages about this bug report.  In
the event that you encounter a regression using the package from
-updates please report a new bug using ubuntu-bug and tag the bug report
regression-update so we can easily find any regressions.

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https://bugs.launchpad.net/bugs/1532855

Title:
  add-apt-repository exits with 0 even when adding key failed

Status in software-properties package in Ubuntu:
  Fix Released
Status in software-properties source package in Xenial:
  Fix Committed
Status in software-properties source package in Yakkety:
  Fix Released

Bug description:
  add-apt-repository exits happily even if it failed adding the key:

  $ sudo env LANGUAGE=en add-apt-repository ppa:launchpad/buildd-staging -k hkp://bad-server/
   Buildd staging packages for Launchpad. New packages are staged here for testing on the staging PPA buildds.
   More info: https://launchpad.net/~launchpad/+archive/ubuntu/buildd-staging
  Press [ENTER] to continue or ctrl-c to cancel adding it

  gpg: keyring `/tmp/tmp3246v7n8/secring.gpg' created
  gpg: keyring `/tmp/tmp3246v7n8/pubring.gpg' created
  gpg: requesting key 0A5174AF from hkp server bad-server
  ?: bad-server: Host not found
  gpgkeys: HTTP fetch error 7: couldn't connect: Success
  gpg: no valid OpenPGP data found.
  gpg: Total number processed: 0
  gpg: keyserver communications error: keyserver unreachable
  gpg: keyserver communications error: public key not found
  gpg: keyserver receive failed: public key not found

  $ echo $?
  0

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: software-properties-common 0.96.17
  ProcVersionSignature: Ubuntu 4.3.0-5.16-generic 4.3.3
  Uname: Linux 4.3.0-5-generic x86_64
  ApportVersion: 2.19.3-0ubuntu2
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Mon Jan 11 17:17:56 2016
  PackageArchitecture: all
  SourcePackage: software-properties
  UpgradeStatus: Upgraded to xenial on 2015-10-28 (74 days ago)

  Related bugs:
   * bug 1671566 when gpg key add fails, entry is still added to sources.list

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