[Bug 1879591] [NEW] 18.04 to 20.04 do-release-upgrade -d at step: Calculating the Changes

[Nigel A Reading]

Public bug reported:

I have tried the upgrade several time and it seems to fail when dealing
with installed third party applications that have ppa entries.  I have
disabled them and rerun the upgrade to no avail.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.37
ProcVersionSignature: Ubuntu 4.15.0-101.102-generic 4.15.18
Uname: Linux 4.15.0-101-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.14
Architecture: amd64
CrashDB: ubuntu
Date: Wed May 20 10:51:33 2020
InstallationDate: Installed on 2018-07-04 (686 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2020-05-19 (0 days ago)

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic dist-upgrade

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https://bugs.launchpad.net/bugs/1879591

Title:
  18.04 to 20.04 do-release-upgrade -d  at step: Calculating the Changes

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

Bug description:
  I have tried the upgrade several time and it seems to fail when
  dealing with installed third party applications that have ppa entries.
  I have disabled them and rerun the upgrade to no avail.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.37
  ProcVersionSignature: Ubuntu 4.15.0-101.102-generic 4.15.18
  Uname: Linux 4.15.0-101-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.14
  Architecture: amd64
  CrashDB: ubuntu
  Date: Wed May 20 10:51:33 2020
  InstallationDate: Installed on 2018-07-04 (686 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_AU.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2020-05-19 (0 days ago)

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