[Bug 1068864] Re: package man-db 2.6.3-1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 255

[Colin Watson]

*** This bug is a duplicate of bug 1372673 ***
    https://bugs.launchpad.net/bugs/1372673

Thanks for your report.  The basic problem here is that man-db's trigger
uses debconf to decide whether to update the manual page database, but
debconf is not always reliably usable in triggers.  I finally figured
out a simple way to avoid this problem, which I'm tracking as bug
1372673.  If you are still affected by this locally (which I realise is
unlikely in the case of some of the older bugs of this type), then
running "sudo dpkg --configure -a && sudo apt-get -f install" in a
terminal should normally be enough to get the package management system
back to a sensible state.

** This bug has been marked a duplicate of bug 1372673
   excessive debconf use when triggered

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https://bugs.launchpad.net/bugs/1068864

Title:
  package man-db 2.6.3-1 failed to install/upgrade: subprocess installed
  post-installation script returned error exit status 255

Status in “man-db” package in Ubuntu:
  Confirmed

Bug description:
  this just popped up

  ProblemType: Package
  DistroRelease: Ubuntu 12.10
  Package: man-db 2.6.3-1
  ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
  Uname: Linux 3.5.0-17-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.6.1-0ubuntu4
  Architecture: amd64
  Date: Fri Oct 19 17:25:09 2012
  DuplicateSignature:
   Processing triggers for man-db ...
   Can't locate object method "new" via package "Debconf::Element::Noninteractive::Boolean" at /usr/share/perl5/Debconf/FrontEnd.pm line 68, <GEN1> line 2.
   dpkg: error processing man-db (--unpack):
    subprocess installed post-installation script returned error exit status 255
  ErrorMessage: subprocess installed post-installation script returned error exit status 255
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Beta amd64 (20120926)
  MarkForUpload: True
  SourcePackage: man-db
  Title: package man-db 2.6.3-1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 255
  UpgradeStatus: No upgrade log present (probably fresh install)

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