[Bug 1806427] [NEW] {pkg.name for pkg in cache if pkg.is_auto_removable } crashes with KeyError

[errors.ubuntu.com bug bridge]

Public bug reported:

The crash was observed in unattended-upgrades but this iteration should
not raise a KeyError IMO.

The Ubuntu Error Tracker has been receiving reports about a problem regarding unattended-upgrades.  This problem was most recently seen with package version 1.1ubuntu1.18.04.7, the problem page at https://errors.ubuntu.com/problem/989adb762a1c94d142593ee43970bd510a577223 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/.

** Affects: python-apt (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: bionic

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https://bugs.launchpad.net/bugs/1806427

Title:
  {pkg.name for pkg in cache if pkg.is_auto_removable } crashes with
  KeyError

Status in python-apt package in Ubuntu:
  New

Bug description:
  The crash was observed in unattended-upgrades but this iteration
  should not raise a KeyError IMO.

  The Ubuntu Error Tracker has been receiving reports about a problem regarding unattended-upgrades.  This problem was most recently seen with package version 1.1ubuntu1.18.04.7, the problem page at https://errors.ubuntu.com/problem/989adb762a1c94d142593ee43970bd510a577223 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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