[Bug 1737442] Please test proposed package

[Łukasz Zemczak]

Hello errors.ubuntu.com, or anyone else affected,

Accepted unattended-upgrades into xenial-proposed. The package will
build now and be available at https://launchpad.net/ubuntu/+source
/unattended-upgrades/1.1ubuntu1.18.04.7~16.04.1 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/1737442

Title:
  /usr/bin/unattended-upgrade:apt_pkg.Error:/usr/bin/unattended-
  upgrade at 1706:main:__init__:__init__:open

Status in unattended-upgrades package in Ubuntu:
  Fix Released
Status in unattended-upgrades source package in Xenial:
  Fix Committed

Bug description:
  [Impact]

   * Unattended-upgrades crashes when initializing the cache preventing security updates to be applied.
   * The fix prints an error message then exits

  [Test Case]

   * Observe
  https://errors.ubuntu.com/problem/cb12eff1497c73b95a2a51f4213bc3f30f2ac4d5
  not happening in fixed releases

  [Regression Potential]

   * The fix is simply catching the error and exiting, there is little
  room for regressions. In the worst case u-u crashes differently when
  printing the error.

  [Original Bug Text]

  
  The Ubuntu Error Tracker has been receiving reports about a problem regarding unattended-upgrades.  This problem was most recently seen with package version 0.98ubuntu1, the problem page at https://errors.ubuntu.com/problem/933de54e4841d617eb5c73ab02bb2d3be522a6ff contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
  If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/.

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