[Bug 1843076] Re: [eoan regression] Clicking install button no longer works in update-manager

[Julian Andres Klode]

Sounds similar to bug 1843076, although that bug does not say anything
about a crash. Not sure if related.

** Tags added: rls-ee-incoming

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https://bugs.launchpad.net/bugs/1843076

Title:
  [eoan regression] Clicking install button no longer works in update-
  manager

Status in ubuntu-release-upgrader package in Ubuntu:
  Confirmed
Status in update-manager package in Ubuntu:
  New

Bug description:
  It would appear that the latest version of ubuntu-release-upgrader
  (1:19.10.11) causes the install button in update-manager to no longer
  work.

  steps to reproduce:
  - launch 'update manager'
  - updates are available
  - click 'install now'
  - nothing happens (ie crash with the below traceback)

  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/UpdatesAvailable.py", line 848, in on_button_install_clicked
      self.cache.checkFreeSpace()
    File "/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeCache.py", line 1161, in checkFreeSpace
      ("/var", self.quirks.extra_snap_space),
  AttributeError: 'MyCache' object has no attribute 'quirks'

  eoan:
  - update-manager 1:19.04.7
  - ubuntu-release-upgrader 1:19.10.11

  Confirmed by
  https://errors.ubuntu.com/problem/94df71a401d64c84828d7e85e15fc6c4b3555b99

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