[Bug 1847300] Please test proposed package

[Łukasz Zemczak]

Hello Robert, or anyone else affected,

Accepted livecd-rootfs into xenial-proposed. The package will build now
and be available at https://launchpad.net/ubuntu/+source/livecd-
rootfs/2.408.55 in a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested and change the tag from
verification-needed-xenial to verification-done-xenial. If it does not
fix the bug for you, please add a comment stating that, and change the
tag to verification-failed-xenial. In either case, without details of
your testing we will not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

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https://bugs.launchpad.net/bugs/1847300

Title:
  [backport] magic-proxy: dump proxy log to stdout on failure

Status in livecd-rootfs package in Ubuntu:
  New
Status in livecd-rootfs source package in Xenial:
  Fix Committed
Status in livecd-rootfs source package in Bionic:
  Fix Committed
Status in livecd-rootfs source package in Disco:
  Fix Committed

Bug description:
  [Impact]

  When we encounter a failure in 'lb binary' the launchpad builders can
  only surface the build output from stdout.  If the binary hook failure
  implicates the archive we can not determine fault without the apt
  proxy log.  Backporting the patch from eoan will dump the proxy log
  to stdout to aid in debugging these failures.

  [Test case]

  Run a build with a $REPO_SNAPSHOT_STAMP and a binary hook with 'exit
  1'.  The apt proxy log should end up on stdout.

  [Regression Potential]

  Nearly none. This dumps a file to stdout in the failure exit path; a
  failure at this stage does not change the outcome of the build.

  [Other Info]

  We are seeing issues today in builds that need this debug output in
  place, we would like to move this SRU through quickly.  The code has
  been running in eoan for at least a week without issue.

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