"Installer crashed" by downloading package list by 83%.

[Firko]

By trying to install ubuntu beta 7.04 or linux mint bianca (based on ubuntu 6.10) the installer crashed at 83% of the installing process (downloading package list). I got following message:

We're sorry; the installer crashed. Please file a new bug report at https://launchpad.net/distros/ubuntu/+source/ubiquity/+filebug (do not attach your details to any existing bug) and a developer will attend to the problem as soon as possible. To help the developers understand what went wrong, include the following detail in your bug report, and attach the files /var/log/syslog and /var/log/partman:

Traceback (most recent call last):
  File "/usr/bin/ubiquity", line 166, in ?
    main()
  File "/usr/bin/ubiquity", line 161, in main
    install(sys.argv[1])
  File "/usr/bin/ubiquity", line 57, in install
    ret = wizard.run()
  File "/usr/lib/ubiquity/ubiquity/frontend/gtkui.py", line 305, in run
    self.process_step()
  File "/usr/lib/ubiquity/ubiquity/frontend/gtkui.py", line 856, in process_step
    self.progress_loop()
  File "/usr/lib/ubiquity/ubiquity/frontend/gtkui.py", line 628, in progress_loop
    raise RuntimeError, ("Install failed with exit code %s\n%s" %
RuntimeError: Install failed with exit code 1
Traceback (most recent call last):
  File "/usr/share/ubiquity/install.py", line 1404, in ?
    install.run()
  File "/usr/share/ubiquity/install.py", line 355, in run
    self.install_language_packs()
  File "/usr/share/ubiquity/install.py", line 836, in install_language_packs
    self.mark_install(cache, lp)
  File "/usr/share/ubiquity/install.py", line 763, in mark_install
    assert cache._depcache.BrokenCount == 0
AssertionError

[Colin Watson (cjwatson)]

Thanks for your report. This is also bug 61912, and occurs due to a failure to handle uninstallable language packs. You can typically work around this by installing in English or by disconnecting from the network during installation.