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[Apport retracing service <841564@xxxxxxxxxxxxxxxxxx>]

*** This bug is a duplicate of bug 837285 ***
    https://bugs.launchpad.net/bugs/837285

Thank you for taking the time to report this crash and helping to make
Ubuntu better.  This particular crash has already been reported and is a
duplicate of bug #837285, so is being marked as such.  Please look at
the other bug report to see if there is any missing information that you
can provide, or to see if there is a workaround for the bug.
Additionally, any further discussion regarding the bug should occur in
the other report.  Please continue to report any other bugs you may
find.

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** Attachment removed: "ThreadStacktrace.txt"
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** This bug has been marked a duplicate of private bug 837285

** Visibility changed to: Public

** Tags removed: need-amd64-retrace

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Packages, which is subscribed to lightdm in Ubuntu.
https://bugs.launchpad.net/bugs/841564

Title:
  lightdm assert failure: lightdm: pam_mount.c:417: modify_pm_count:
  Assertion `user != ((void *)0)' failed.

Status in “lightdm” package in Ubuntu:
  New

Bug description:
  Happened after Unity/Compiz has started and after clicking on two
  program icons in the launcher.

  ProblemType: Crash
  DistroRelease: Ubuntu 11.10
  Package: lightdm 0.9.3-0ubuntu8
  ProcVersionSignature: Ubuntu 3.0.0-10.16-generic 3.0.4
  Uname: Linux 3.0.0-10-generic x86_64
  Architecture: amd64
  AssertionMessage: lightdm: pam_mount.c:417: modify_pm_count: Assertion `user != ((void *)0)' failed.
  Date: Fri Sep  2 16:08:26 2011
  ExecutablePath: /usr/sbin/lightdm
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20110201.2)
  ProcCmdline: lightdm
  ProcEnviron: PATH=(custom, no user)
  Signal: 6
  SourcePackage: lightdm
  StacktraceTop:
   __GI___assert_fail (assertion=0x7f6fa413c63c "user != ((void *)0)", file=<optimized out>, line=417, function=<optimized out>) at assert.c:81
   ?? () from /lib/security/pam_mount.so
   pam_sm_close_session () from /lib/security/pam_mount.so
   ?? () from /lib/x86_64-linux-gnu/libpam.so.0
   ?? ()
  Title: lightdm assert failure: lightdm: pam_mount.c:417: modify_pm_count: Assertion `user != ((void *)0)' failed.
  UpgradeStatus: Upgraded to oneiric on 2011-08-26 (10 days ago)
  UserGroups:

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