[Bug 870694] Re: libapt-pkg.so.4.11.0 segfault during initial system installation (ubiquity)

[ruff]

removing /var/lib/aptitude/pkgstates* did help
I also cleaned /var/lib/apt/lists/*_<release>* files but it didn't help, until i removed those files above.
Now pkstates file is recreated and apt* works but became considerably slower (huge amount of IO - system gets stuck at IOwait during apt operations), not sure if it is consequence of upgrade or file recreation.

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https://bugs.launchpad.net/bugs/870694

Title:
  libapt-pkg.so.4.11.0 segfault during initial system installation
  (ubiquity)

Status in “apt” package in Ubuntu:
  Confirmed

Bug description:
  I'm doing a simple install to 2 xfs partitions. At first I was trying
  to keep /home unformatted, but the installer would crash at the same
  point as in this bug report. I backed up /home and chose to format
  this partition, but I'm still experiencing the crash.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: ubiquity 2.8.4
  ProcVersionSignature: Ubuntu 3.0.0-12.19-generic 3.0.4
  Uname: Linux 3.0.0-12-generic x86_64
  ApportVersion: 1.23-0ubuntu2
  Architecture: amd64
  CasperVersion: 1.285
  Date: Sat Oct  8 15:12:35 2011
  LiveMediaBuild: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20111007.1)
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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