Ubuntu
ubuntu-release-upgrader package

do-release-upgrade crashed with AttributeError in calcDistUpgrade(): 'DistUpgradeController' object has no attribute 'tasks'

Bug #1898784 reported by Frits Jalvingh on 2020-10-06

This bug report is a duplicate of: Bug #1969786: Upgrade from 20.04 to 22.04 failed: AttributeError: 'DistUpgradeController' object has no attribute 'tasks'. Edit Remove

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	ubuntu-release-upgrader (Ubuntu)	New	Medium	Unassigned

Bug Description

Did an install that already failed once because it was spontaneously switching to ipv6 to download, then failing all downloads.
I restored the apt sources.list from the previous version, then restarted do-release-update.

That failed with this error. After that it was a bit of work to get things alive again as apt was no longer available.

ProblemType: Crash
DistroRelease: Ubuntu 20.10
Package: ubuntu-release-upgrader-core 1:20.10.12
ProcVersionSignature: Ubuntu 5.8.0-7618.19~1599238533~20.10~d281510~dev-generic 5.8.4
Uname: Linux 5.8.0-7618-generic x86_64
ApportVersion: 2.20.11-0ubuntu49
Architecture: amd64
CasperMD5CheckResult: skip
CrashDB: ubuntu
Date: Tue Oct 6 21:31:46 2020
ExecutablePath: /usr/bin/do-release-upgrade
InstallationDate: Installed on 2020-09-04 (32 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
InterpreterPath: /usr/bin/python3.8
PackageArchitecture: all
ProcCmdline: /usr/bin/python3 /tmp/ubuntu-release-upgrader-xcftkgja/groovy --mode=server --frontend=DistUpgradeViewText --devel-release
Python3Details: /usr/bin/python3.8, Python 3.8.6, python3-minimal, 3.8.2-0ubuntu2
PythonArgs: ['/usr/bin/do-release-upgrade', '--mode=server', '--frontend=DistUpgradeViewText', '--devel-release']
PythonDetails: N/A
SourcePackage: ubuntu-release-upgrader
Title: do-release-upgrade crashed with AttributeError in calcDistUpgrade(): 'DistUpgradeController' object has no attribute 'tasks'
UpgradeStatus: Upgraded to groovy on 2020-10-06 (0 days ago)
UserGroups: N/A

Tags:

Revision history for this message

Frits Jalvingh (fjalvingh) wrote on 2020-10-06:

CurrentDmesg.txt.txt Edit (92.6 KiB, text/plain; charset="utf-8")
Dependencies.txt Edit (2.4 KiB, text/plain; charset="utf-8")
DuplicateSignature.txt Edit (750 bytes, text/plain; charset="utf-8")
JournalErrors.txt Edit (126.9 KiB, text/plain; charset="utf-8")
ProcCpuinfoMinimal.txt Edit (1.5 KiB, text/plain; charset="utf-8")
ProcEnviron.txt Edit (288 bytes, text/plain; charset="utf-8")
ProcMaps.txt Edit (50.4 KiB, text/plain; charset="utf-8")
ProcStatus.txt Edit (1.3 KiB, text/plain; charset="utf-8")
Traceback.txt Edit (759 bytes, text/plain; charset="utf-8")
VarLogDistupgradeAptHistorylog.txt Edit (176.7 KiB, text/plain; charset="utf-8")
VarLogDistupgradeAptclonesystemstate.tar.gz Edit (755.5 KiB, application/x-gzip)
VarLogDistupgradeAptlog.txt Edit (88.3 KiB, text/plain; charset="utf-8")
VarLogDistupgradeApttermlog.txt Edit (127.3 KiB, text/plain; charset="utf-8")
VarLogDistupgradeLspcitxt.txt Edit (3.8 KiB, text/plain; charset="utf-8")
VarLogDistupgradeMainlog.txt Edit (67.9 KiB, text/plain; charset="utf-8")

Apport retracing service (apport) on 2020-10-06

tags:	removed: need-duplicate-check
Changed in ubuntu-release-upgrader (Ubuntu):
importance:	Undecided → Medium

Brian Murray (brian-murray) on 2020-10-27

information type:

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Ubuntuubuntu-release-upgrader package