I just tried to upgrade ubuntu and it said that there is an error.

[Łukasz Jochemczyk]

I have no idea what happened. I wanted to upgrade the system from ubuntu 14.04 to 15.10. The ubuntu upgrade software reported a bug and terminated the upgrade processs, and then asked if I want to report a bug, and so I am doing right now.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.8
ProcVersionSignature: Ubuntu 3.19.0-58.64~14.04.1-generic 3.19.8-ckt16
Uname: Linux 3.19.0-58-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: Unity
Date: Sat May 7 05:26:29 2016
InstallationDate: Installed on 2015-12-11 (147 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2016-05-07 (0 days ago)
VarLogDistupgradeTermlog:

mtime.conffile..etc.update.manager.release.upgrades: 2016-04-23T22:47:32.197637