[Bug 1537015] Re: Release upgrade from 14.04 to 15.04 fails

[Brian Murray]

*** This bug is a duplicate of bug 1534374 ***
    https://bugs.launchpad.net/bugs/1534374

Thank you for taking the time to report this bug and helping to make
Ubuntu better. This particular bug has already been reported and is a
duplicate of bug 1534374, so it 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.

** This bug has been marked a duplicate of bug 1534374
   unable to upgrade to 15.04 due to libstdc++6 SRU

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https://bugs.launchpad.net/bugs/1537015

Title:
  Release upgrade from 14.04 to 15.04 fails

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

Bug description:
  Release upgrade from 14.04 to 15.04 return this error:

  Calculating the changes
  Calculating the changes
  Could not calculate the upgrade
  An unresolvable problem occurred while calculating the upgrade.
  This can be caused by:
  * Upgrading to a pre-release version of Ubuntu
  * Running the current pre-release version of Ubuntu
  * Unofficial software packages not provided by Ubuntu

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubuntu-release-upgrader-core 1:0.220.8
  ProcVersionSignature: Ubuntu 3.19.0-47.53~14.04.1-generic 3.19.8-ckt10
  Uname: Linux 3.19.0-47-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity
  Date: Fri Jan 22 11:28:39 2016
  InstallationDate: Installed on 2016-01-13 (8 days ago)
  InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to trusty on 2016-01-22 (0 days ago)
  VarLogDistupgradeTermlog:

  modified.conffile..etc.update.manager.release.upgrades: [modified]
  mtime.conffile..etc.update.manager.release.upgrades: 2016-01-22T10:17:12.499300

  Nor do I have way to update wing version 14.10.

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