[Bug 1545887] Re: do-release-upgrade crashed with SystemError: E:Sub-process /usr/bin/dpkg returned an error code (1)

[Apport retracing service]

*** This bug is a duplicate of bug 1292996 ***
    https://bugs.launchpad.net/bugs/1292996

Thank you for taking the time to report this crash and helping to make
this software better.  This particular crash has already been reported
and is a duplicate of bug #1292996, 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.

** Tags removed: need-duplicate-check

** Changed in: ubuntu-release-upgrader (Ubuntu)
   Importance: Undecided => Medium

** Attachment removed: "ProcMaps.txt"
   https://bugs.launchpad.net/bugs/1545887/+attachment/4572510/+files/ProcMaps.txt

** Attachment removed: "ProcStatus.txt"
   https://bugs.launchpad.net/bugs/1545887/+attachment/4572511/+files/ProcStatus.txt

** This bug has been marked a duplicate of bug 1292996
   do-release-upgrade crashed with SystemError: E:Sub-process /usr/bin/dpkg returned an error code (1)

** Information type changed from Private to Public

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https://bugs.launchpad.net/bugs/1545887

Title:
  do-release-upgrade crashed with SystemError: E:Sub-process
  /usr/bin/dpkg returned an error code (1)

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  Upgrading from 15.10 Wily to 16.04 Xenial

  ProblemType: Crash
  DistroRelease: Ubuntu 16.04
  Package: ubuntu-release-upgrader-core 1:16.04.4
  ProcVersionSignature: Ubuntu 4.4.0-4.19-generic 4.4.1
  Uname: Linux 4.4.0-4-generic x86_64
  ApportVersion: 2.20-0ubuntu2
  Architecture: amd64
  CrashDB: ubuntu
  Date: Mon Feb 15 16:18:47 2016
  DuplicateSignature: SystemError: E:Sub-process /usr/bin/dpkg returned an error code (1)
  ExecutablePath: /usr/bin/do-release-upgrade
  InstallationDate: Installed on 2015-01-02 (409 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  InterpreterPath: /usr/bin/python3.5
  PackageArchitecture: all
  ProcCmdline: /usr/bin/python3 /tmp/ubuntu-release-upgrader-7hfqlzzw/xenial --mode=server --frontend=DistUpgradeViewText --devel-release
  PythonArgs: ['/usr/bin/do-release-upgrade', '--mode=server', '--frontend=DistUpgradeViewText', '--devel-release']
  SourcePackage: ubuntu-release-upgrader
  Title: do-release-upgrade crashed with SystemError: E:Sub-process /usr/bin/dpkg returned an error code (1)
  Traceback: SystemError: E:Sub-process /usr/bin/dpkg returned an error code (1)
  UpgradeStatus: Upgraded to xenial on 2016-02-15 (0 days ago)
  UserGroups:

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