[Bug 1633695] Re: upgrade to 16.10 fails

[Brian Murray]

** Package changed: update-manager (Ubuntu) => ubuntu-release-upgrader
(Ubuntu)

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https://bugs.launchpad.net/bugs/1633695

Title:
  upgrade to 16.10 fails

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  Attempting to upgrade 16.04 -> 16.10 fails with cryptic error:

  sudo update-manager

  /usr/bin/update-manager:28: PyGIWarning: Gtk was imported without specifying a version first. Use gi.require_version('Gtk', '3.0
  ') before import to ensure that the right version gets loaded.
    from gi.repository import Gtk
  /usr/lib/python3/dist-packages/UpdateManager/UnitySupport.py:29: PyGIWarning: Dbusmenu was imported without specifying a version
   first. Use gi.require_version('Dbusmenu', '0.4') before import to ensure that the right version gets loaded.
    from gi.repository import Dbusmenu, Unity
  /usr/lib/python3/dist-packages/UpdateManager/UnitySupport.py:29: PyGIWarning: Unity was imported without specifying a version first. Use gi.require_version('Unity', '7.0') before import to ensure that the right version gets loaded.
    from gi.repository import Dbusmenu, Unity
  Проверка наличия нового релиза Ubuntu
  /usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeFetcher.py:23: PyGIWarning: Gtk was imported without specifying a version first. Use gi.require_version('Gtk', '3.0') before import to ensure that the right version gets loaded.
    from gi.repository import Gtk, Gdk
  /usr/lib/python3/dist-packages/DistUpgrade/ReleaseNotesViewerWebkit.py:36: PyGIWarning: WebKit was imported without specifying a version first. Use gi.require_version('WebKit', '3.0') before import to ensure that the right version gets loaded.
    from gi.repository import WebKit
  Traceback (most recent call last):
  Traceback (most recent call last):
    File "/usr/bin/do-release-upgrade", line 165, in <module>
      fetcher.run()
    File "/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeFetcherCore.py", line 275, in run
      if not self.showReleaseNotes():
    File "/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeFetcher.py", line 62, in showReleaseNotes
      res = self._try_show_release_notes_webkit()
    File "/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeFetcher.py", line 74, in _try_show_release_notes_webkit
      self.new_dist.releaseNotesHtmlUri)
    File "/usr/lib/python3/dist-packages/DistUpgrade/ReleaseNotesViewerWebkit.py", line 48, in __init__
      self._on_navigation_policy_decision_requested)
  AttributeError: 'ReleaseNotesViewerWebkit' object has no attribute '_on_navigation_policy_decision_requested'

  This is xubuntu 16.04 x86_64 with all the latest updates installed.

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