[Bug 1635155] Re: ubuntu-release-upgrader crashed with AttributeError: 'ReleaseNotesViewerWebkit' object has no attribute '_on_navigation_policy_decision_requested'

[Launchpad Bug Tracker]

** Branch linked: lp:ubuntu-release-upgrader

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https://bugs.launchpad.net/bugs/1635155

Title:
  ubuntu-release-upgrader crashed with AttributeError:
  'ReleaseNotesViewerWebkit' object has no attribute
  '_on_navigation_policy_decision_requested'

Status in ubuntu-release-upgrader package in Ubuntu:
  In Progress
Status in ubuntu-release-upgrader source package in Yakkety:
  Triaged

Bug description:
  The Ubuntu Error Tracker has been receiving reports about a problem regarding ubuntu-release-upgrader.  This problem was most recently seen with package version 1:16.04.17, the problem page at https://errors.ubuntu.com/problem/39e90bcbbf46994181fc6eaccce46d5df8d990a2 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 you can request it at http://forms.canonical.com/reports/.

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