Its worth mentioning that for bugs with links to Error Tracker crash
buckets that those buckets will probably not receive crash reports from
the new version of the package even if it is "the same crash" because
bucketing is done using python line numbers which are likely to change
given the scope of changes.  The point being a search should be done of
crash reports in the Error Tracker about Ubuntu 16.04 with the new
package version for any bugs that have a known crash bucket to really
ensure that they are still not occurring.

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https://bugs.launchpad.net/bugs/1702793

Title:
  Full backport SRU for unattended-upgrades

Status in unattended-upgrades package in Ubuntu:
  In Progress

Bug description:
  [Impact]

  * I would like to propose a one-off full backport of unattended-upgrades
  1.2ubuntu1 to Bionic, Artful, Xenial and possibly Trusty releases because 
selectively backporting fixes for crashes and for issues that made u-u 
unreliable would be more risky thanks to the huge number of fixes and the
  inter-dependencies between them.

  [Test Case]

  * Since this backport involves fixing several bugs and this bug itself
  covers the full backport this is an overview of all LP bugs the upload
  fixes:

  - most important bugs (feel free to add more)
     + LP: #1615381 : apt-get autoremove may remove current kernel

  All LP bugs fixed by the backport, comments are welcome:
     + LP: #1230246 could use SRU template but seems straightforward
     + LP: #1260041 SRU template ok
     + LP: #1269177 already fixed in 0.90ubuntu0.9
     + LP: #1357093 dup of LP: #1675079
     + LP: #1396787 SRU template ok
     + LP: #1446552 SRU template ok
     + LP: #1455097 SRU template ok
     + LP: #1458204 could use SRU template but seems straightforward
     + LP: #1544942 already fixed in 0.90ubuntu0.8
     + LP: #1577215 could use SRU template but seems straightforward
     + LP: #1602536 SRU template ok
     + LP: #1615381 could use SRU template but seems straightforward
     + LP: #1624644 SRU template ok
     + LP: #1632361 the bug is referenced mistakenly while u-u had a related 
fix which has no meaningful impact on users
     + LP: #1649709 not affecting xenial
     + LP: #1654070 could use SRU template but seems straightforward
     + LP: #1654600 SRU template ok
     + LP: #1675079 SRU template ok
     + LP: #1680599 could use SRU template but seems straightforward
     + LP: #1686470 SRU template ok
     + LP: #1687129 already fixed in 0.90ubuntu0.6
     + LP: #1690980 SRU template ok
     + LP: #1698159 SRU template ok
     + LP: #1702793 this bug
     + LP: #1714019 just a merge request
     + LP: #1718419 just a merge request
     + LP: #1719630 SRU template ok
     + LP: #1722426 just a merge request
     + LP: #1737441 fix not tracked for u-u in xenial, just for python-apt
     + LP: #1737442 SRU template ok
     + LP: #1737635 SRU template ok
     + LP: #1737637 SRU template ok
     + LP: #1737717 SRU template ok
     + LP: #1741579 SRU template ok
     + LP: #1764797 just a merge request
     + LP: #1773033 SRU template ok
     + LP: #1775292 SRU template ok
     + LP: #1775307 SRU template ok
     + LP: #1778219 SRU template ok
     + LP: #1778800 SRU template ok
     + LP: #1779157 SRU template ok
     + LP: #1781176 SRU template ok
     + LP: #1781183 SRU template ok
     + LP: #1781446 SRU template ok
     + LP: #1781586 SRU template ok
     + LP: #1785093 SRU template ok
     + LP: #1789637 SRU template ok
     + LP: #1803749 SRU template ok

  [Regression Potential]

  * Due to this update covering the full backport unattended-upgrades
  can regress in any imaginable way including failing to install,
  upgrade, run, or removing essential packages from the system. Those
  are unlikely.* There are open bugs about u-u being slower than in the
  past, thus this may be a likely regression but IMO the pending speed
  optimizations should not be blocking the backport because the
  reliability issues are more important to fix and speed optimizations
  can be cherry-picked later.

  [Other Info]

  I asked for an exception for the package in following the SRU process:
  https://lists.ubuntu.com/archives/ubuntu-release/2018-May/004479.html

  I'm preparing the backport in ppa:rbalint/scratch and also run
  autopkgtests on it in addition to testing it manually in VMs.

  [Original Bug Text]

  Changes to support day-of-week patching and logging to syslog were
  added to upstream (https://github.com/mvo5/unattended-upgrades) over a
  year ago. These changes are not present in the latest Xenial nor
  Trusty packages (0.90 and 0.82.1) - requesting that these changes be
  pulled from upstream.

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