[Bug 1987720] [NEW] update from 20.04 to 22.04 breaks during calculating new sources

[Danila]

Public bug reported:

updating stops when calculating new sources(in gui interface of
updating)

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubuntu-release-upgrader-core 1:20.04.39
ProcVersionSignature: Ubuntu 5.4.0-125.141-generic 5.4.195
Uname: Linux 5.4.0-125-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.24
Architecture: amd64
CasperMD5CheckResult: skip
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Fri Aug 26 06:27:40 2022
InstallationDate: Installed on 2021-05-01 (481 days ago)
InstallationMedia: Ubuntu 18.04.5 LTS "Bionic Beaver" - Release amd64 (20200806.1)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to focal on 2022-08-26 (0 days ago)
VarLogDistupgradeTermlog:

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


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

** Attachment added: "log of update"
   https://bugs.launchpad.net/bugs/1987720/+attachment/5611728/+files/apt.log

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https://bugs.launchpad.net/bugs/1987720

Title:
  update from 20.04 to 22.04 breaks during calculating new sources

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

Bug description:
  updating stops when calculating new sources(in gui interface of
  updating)

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubuntu-release-upgrader-core 1:20.04.39
  ProcVersionSignature: Ubuntu 5.4.0-125.141-generic 5.4.195
  Uname: Linux 5.4.0-125-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu27.24
  Architecture: amd64
  CasperMD5CheckResult: skip
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Aug 26 06:27:40 2022
  InstallationDate: Installed on 2021-05-01 (481 days ago)
  InstallationMedia: Ubuntu 18.04.5 LTS "Bionic Beaver" - Release amd64 (20200806.1)
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=ru_RU.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to focal on 2022-08-26 (0 days ago)
  VarLogDistupgradeTermlog:

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