[Bug 792652] Re: ubiquity crashed with ValueError in command(): I/O operation on closed file

[Colin Watson]

I believe that this is ultimately a regression caused by the fix for bug
756920 (ubiquity r4693).  In order to try to ensure that the boot loader
choice was recorded in debconf in every possible code path, this was
done in exit_ui_loops as a sort of "finally" handler.  However,
exit_ui_loops is only supposed to do frontend interaction, and (as this
bug demonstrates) it isn't safe for it to attempt to talk to debconf.  I
think a correct fix would move this out of exit_ui_loops again and try
to find a safer way to fix the original bug.

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Title:
  ubiquity crashed with ValueError in command(): I/O operation on closed
  file

Status in “ubiquity” package in Ubuntu:
  Triaged
Status in “ubiquity” source package in Oneiric:
  Won't Fix
Status in “ubiquity” source package in Precise:
  Triaged

Bug description:
  Binary package hint: ubiquity

  I got this problem when I was trying clicking the Install Ubuntu 11.04
  from the desktop on Asus 1215B red.

  ProblemType: Crash
  DistroRelease: Ubuntu 11.04
  Package: ubiquity 2.6.10
  ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
  Uname: Linux 2.6.38-8-generic x86_64
  NonfreeKernelModules: wl
  Architecture: amd64
  Date: Fri Jun  3 21:24:09 2011
  ExecutablePath: /usr/lib/ubiquity/bin/ubiquity
  InterpreterPath: /usr/bin/python2.7
  LiveMediaBuild: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
  ProcCmdline: /usr/bin/python /usr/lib/ubiquity/bin/ubiquity gtk_ui
  ProcEnviron: Error: [Errno 13] Permission denied: '/proc/3371/environ'
  PythonArgs: ['/usr/lib/ubiquity/bin/ubiquity', 'gtk_ui']
  SourcePackage: ubiquity
  Title: ubiquity crashed with ValueError in command(): I/O operation on closed file
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

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