[Bug 1880987] Re: [SRU] /usr/bin/update-manager:TypeError:_on_finished:_action_done:get_deb2snap_dups:_on_finished:_action_done:get_deb2snap_dups

[Łukasz Zemczak]

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

Accepted update-manager into focal-proposed. The package will build now
and be available at https://launchpad.net/ubuntu/+source/update-
manager/1:20.04.10.1 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, what testing has been
performed on the package and change the tag from verification-needed-
focal to verification-done-focal. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-focal. 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.

** Changed in: update-manager (Ubuntu Focal)
       Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-focal

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https://bugs.launchpad.net/bugs/1880987

Title:
  [SRU] /usr/bin/update-
  manager:TypeError:_on_finished:_action_done:get_deb2snap_dups:_on_finished:_action_done:get_deb2snap_dups

Status in update-manager package in Ubuntu:
  Fix Released
Status in update-manager source package in Focal:
  Fix Committed

Bug description:
  [Impact]

  The Ubuntu Error Tracker has been receiving reports about a problem regarding update-manager.  This problem was most recently seen with package version 1:20.04.10, the problem page at https://errors.ubuntu.com/problem/b2c8bc0cb8285d022b6b6aa8a75000e6d82dab19 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/.

  [Test Case]

  This is reproducable by raising an AssertionError during the
  initialization of MyCache in "UpdateManager/backend/__init__.py"
  whereby the cache is then assigned to None:

          except Exception as e:
              logging.debug("error reading cache (%s)" % e)
              cache = None

  [Regression Potential]

  Instead of assigning the cache to None and attempting to continue the
  duplicates check, we now just return an empty array. It's perfectly
  safe to postpone this duplicates check to a later update, so there's
  little regression potential as far as I can see.

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