[Bug 1826213] Re: /usr/bin/update-manager:AttributeError:/usr/bin/update-manager at 118:start_update:start_available:refresh_cache:update

[Łukasz Zemczak]

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

Accepted update-manager into eoan-proposed. The package will build now
and be available at https://launchpad.net/ubuntu/+source/update-
manager/1:19.04.8.1 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-
eoan to verification-done-eoan. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-eoan. 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 Eoan)
       Status: In Progress => Fix Committed

** Tags added: verification-needed-eoan

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https://bugs.launchpad.net/bugs/1826213

Title:
  /usr/bin/update-manager:AttributeError:/usr/bin/update-
  manager at 118:start_update:start_available:refresh_cache:update

Status in update-manager package in Ubuntu:
  Fix Released
Status in update-manager source package in Bionic:
  In Progress
Status in update-manager source package in Eoan:
  Fix Committed
Status in update-manager source package in Focal:
  Fix Committed

Bug description:
  [Impact]
  update-manager is crashing frequently causing a bad user experience.

  [Test Case]
  The crash happens when an AssertionError is raised in MyCache but I haven't figure out how to recreate that. So here's a way to force an assertion error.

  1) edit the MyCache class's __init__ function (found in UpdateManager/Core/MyCache.py) to 'raise AssertionError' which will simulate having a dirty journal or broken packages
  2) run update-manager and observe the Traceback in comment #1

  Additionally, we can use the bucket in the Error Tracker to confirm
  that there are no crashes with the version of the package from
  -proposed.

  [Regression Potential]

  Original Description
  --------------------
  The Ubuntu Error Tracker has been receiving reports about a problem regarding update-manager.  This problem was most recently seen with package version 1:19.04.5, the problem page at https://errors.ubuntu.com/problem/1bcfccc6ceab83c6e401f14c655c1cd5045be5d4 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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