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

[Brian Murray]

A hackish test case for this bug involves the following:

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) comment out 'self.window_main.duplicate_packages = self.get_deb2snap_dups()' in UpdateManager/backend/__init__.py as that will also Traceback on an AssertionError with the Traceback seen in bug 1880987

Having made those changes you'll get the Traceback in this bug and with
the version from -proposed you'll see a 'Not all updates can be
installed' dialog.

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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:
  In Progress
Status in update-manager source package in Focal:
  Confirmed

Bug 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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