Ubiquity crashes in install_misc.py", line 900, in do_install : AttributeError: 'DebconfInstallProgress' object has no attribute 'finishUpdate'

Jul 12 13:01:48 ubuntu plugininstall.py: Exception during installation:
Jul 12 13:01:48 ubuntu plugininstall.py: Traceback (most recent call last):
Jul 12 13:01:48 ubuntu plugininstall.py: File "/usr/lib/ubiquity/ubiquity/install_misc.py", line 890, in do_install
Jul 12 13:01:48 ubuntu plugininstall.py: fetchprogress, installprogress):
Jul 12 13:01:48 ubuntu plugininstall.py: File "/usr/lib/ubiquity/ubiquity/install_misc.py", line 776, in commit_with_verify
Jul 12 13:01:48 ubuntu plugininstall.py: res = cache._fetch_archives(fetcher, pm)
Jul 12 13:01:48 ubuntu plugininstall.py: File "/usr/lib/python3/dist-packages/apt/cache.py", line 304, in _fetch_archives
Jul 12 13:01:48 ubuntu plugininstall.py: return self._run_fetcher(fetcher)
Jul 12 13:01:48 ubuntu plugininstall.py: File "/usr/lib/python3/dist-packages/apt/cache.py", line 286, in _run_fetcher
Jul 12 13:01:48 ubuntu plugininstall.py: raise FetchFailedException(err_msg)
Jul 12 13:01:48 ubuntu plugininstall.py: apt.cache.FetchFailedException: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/t/thunderbird/thunderbird-locale-en-us_14.0~b4+build1-0ubuntu1_all.deb Connection failed [IP: 91.189.91.13 80]
Jul 12 13:01:48 ubuntu plugininstall.py: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/s/scowl/wbritish_7.1-1_all.deb Could not connect to us.archive.ubuntu.com:80 (91.189.91.13). - connect (110: Connection timed out) [IP: 91.189.91.13 80]
Jul 12 13:01:48 ubuntu plugininstall.py:
Jul 12 13:01:48 ubuntu plugininstall.py:
Jul 12 13:01:48 ubuntu plugininstall.py: During handling of the above exception, another exception occurred:
Jul 12 13:01:48 ubuntu plugininstall.py:
Jul 12 13:01:48 ubuntu plugininstall.py: Traceback (most recent call last):
Jul 12 13:01:48 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1687, in <module>
Jul 12 13:01:48 ubuntu plugininstall.py: install.run()
Jul 12 13:01:48 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 56, in wrapper
Jul 12 13:01:48 ubuntu plugininstall.py: func(self)
Jul 12 13:01:48 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 174, in run
Jul 12 13:01:48 ubuntu plugininstall.py: self.install_language_packs()
Jul 12 13:01:48 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 664, in install_language_packs
Jul 12 13:01:48 ubuntu plugininstall.py: self.do_install(self.langpacks, langpacks=True)
Jul 12 13:01:48 ubuntu plugininstall.py: File "/usr/lib/ubiquity/ubiquity/install_misc.py", line 900, in do_install
Jul 12 13:01:48 ubuntu plugininstall.py: installprogress.finishUpdate()
Jul 12 13:01:48 ubuntu plugininstall.py: AttributeError: 'DebconfInstallProgress' object has no attribute 'finishUpdate'

Status changed to 'Confirmed' because the bug affects multiple users.

According to the duplicate this crash seems to occurs when package download is interrupted. In Brendan's report download timeout, in the duplicate it was cancelled by the user.

This bug was fixed in the package ubiquity - 2.11.19

---------------
ubiquity (2.11.19) quantal; urgency=low

  [ Colin Watson ]
  * Simplify DebconfFilter.process_line slightly.
  * Simplify KeyboardNames._load_file using collections.defaultdict.
  * Call installprogress.finish_update() when a download fails or is
    cancelled, not installprogress.finishUpdate() (LP: #1024043).

  [ Dmitrijs Ledkovs ]
  * Make the UI layout test print the failed page/step name.
  * Add crypt security key setup page and move crypt/lvm checkboxes to the
    ask page.
  * Refactor password validation from ubi-usersetup into a reusable
    component (for ubi-partman).
  * Refactor set_autopartition_options method in ubi-partman.py.
  * Add crypto option to ubi-partman.
  * Add command line flag to enable crypt checkbox on the ask page.
  * Add partman-crypto to the dependencies.
  * Add translation strings for crypto.
  * Add graphviz diagram of available ask page options.
  * Automatic update of included source packages: flash-kernel
    3.0~rc.4ubuntu17, yaboot-installer 1.1.21ubuntu1.
  * Update translations.
  * Mark test_pages_fit_on_a_netbook as expected failure. See comment.
 -- Dmitrijs Ledkovs <email address hidden> Wed, 08 Aug 2012 14:34:07 +0100