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[Launchpad Bug Tracker <2064211@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package update-manager - 1:16.04.23

---------------
update-manager (1:16.04.23) xenial; urgency=medium

  * Don't crash if the end-points of the Pro API fail (LP: #2064211).

update-manager (1:16.04.22) xenial; urgency=medium

  * Replace Popen to 'ua security-status --format=json' by the Ubuntu Pro API.
    The former is not stable enough and would break the program once in a
    while when something unrelated to Update Manager (Livepatch, for instance)
    went awry. The updates() end point from the API, on the other hand,
    does not raise exceptions. LP: #2058133.

update-manager (1:16.04.21) xenial; urgency=medium

  * Fix autopkgtest (linter errors).

update-manager (1:16.04.20) xenial; urgency=medium

  * d/control: Depend on ubuntu-advantage-tools >= 30~.
    Fixes edge case whereby the program crashes upon an incomplete
    response from ua security-status (LP: #2049785).
  * The New Release dialog should take precedence over a list of updates dialog
    if the latter would only show Ubuntu Pro updates in an unattached system.
    (LP: #2051115).

update-manager (1:16.04.19) xenial; urgency=medium

  * Add back removed widgets to UI file to fix crash when updating
    Upgrade Manager from inside itself (LP: #2045918).

update-manager (1:16.04.18) xenial; urgency=medium

  * Implement the new Ubuntu Pro design (lp: #1990450).
    - Fuse the description and changes tabs into a single view.
    - Add button to attach to enable Ubuntu Pro if it is the only action
      available.
    - Ubuntu base -> System components.
    - Fix Ubuntu Pro item not being a parent group of its corresponding
      packages.
    - Fix incorrect available version for Ubuntu Pro updates in unattached case
      (LP: #2043425).

 -- Nathan Pratta Teodosio <nathan.teodosio@xxxxxxxxxxxxx>  Wed, 26 Jun
2024 11:11:46 +0200

** Changed in: update-manager (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/2064211

Title:
  /usr/bin/update-
  manager:AttributeError:<lambda>:available:start_available:refresh_cache:_get_ua_security_status

Status in update-manager package in Ubuntu:
  Fix Released
Status in update-manager source package in Xenial:
  Fix Released
Status in update-manager source package in Bionic:
  Fix Released
Status in update-manager source package in Focal:
  Fix Released
Status in update-manager source package in Jammy:
  Fix Released
Status in update-manager source package in Noble:
  Fix Released

Bug description:
  Impact
  ------

  This bug was is a regression of the bug fix LP:2058133; It held back
  the phasing of the package.

  The symptom is that update-manager crashes right at start, doesn't
  launch.

  The ua.updates() and current_news() end-points are documented to throw
  no exceptions, but actually they might, in which case this bug is
  encountered. As such, the proposed fix tries the API but ignores
  exceptions raised by it, causing update-manager to still work, even if
  the Pro packages end up being classified as normal packages or if Pro
  news aren't displayed.

  Test plan
  ---------

  Run 'UA_CONFIG_FILE=/ update-manager --no-update', update-manager
  should launch, not crash.

  Where problems could occur
  --------------------------

  If the API end-points are working, ensure that classifying Pro
  packages as such and displaying possible Pro news continues to work.

  Original report
  ---------------

  Looks like ua.updates() can actually throw an exception. Only that
  would explain this crash.

  Traceback (most recent call last):
    File "/usr/lib/python3/dist-packages/UpdateManager/Dialogs.py", line 118, in <lambda>
      button.connect("clicked", lambda x: callback())
    File "/usr/lib/python3/dist-packages/UpdateManager/Dialogs.py", line 371, in available
      self.window_main.start_available(error_occurred=True)
    File "/usr/lib/python3/dist-packages/UpdateManager/UpdateManager.py", line 242, in start_available
      self.refresh_cache()
    File "/usr/lib/python3/dist-packages/UpdateManager/UpdateManager.py", line 461, in refresh_cache
      self._get_ua_security_status()
    File "/usr/lib/python3/dist-packages/UpdateManager/UpdateManager.py", line 285, in _get_ua_security_status
      for package in self.ua_updates:
  AttributeError: 'UpdateManager' object has no attribute 'ua_updates'

  The Ubuntu Error Tracker has been receiving reports about a problem regarding update-manager.  This problem was most recently seen with package version 1:22.04.20, the problem page at https://errors.ubuntu.com/problem/ed0e9f0ed8bc4002d808a11e37e4ee9d870e32c1 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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