2020-07-28 10:09:08,142 INFO Using config files '['./DistUpgrade.cfg.bionic']'
2020-07-28 10:09:08,142 INFO uname information: 'Linux amr-LIFEBOOK-S761 5.3.0-62-generic #56~18.04.1-Ubuntu SMP Wed Jun 24 16:17:03 UTC 2020 x86_64'
2020-07-28 10:09:08,895 INFO apt version: '1.6.12ubuntu0.1'
2020-07-28 10:09:08,896 INFO python version: '3.6.9 (default, Jul 17 2020, 12:50:27) 
[GCC 8.4.0]'
2020-07-28 10:09:08,900 INFO release-upgrader version '20.04.23' started
2020-07-28 10:09:08,921 INFO locale: 'en_US' 'UTF-8'
2020-07-28 10:09:09,016 INFO screen could not be run
2020-07-28 10:09:09,075 DEBUG Using 'DistUpgradeViewText' view
2020-07-28 10:09:09,156 DEBUG enable dpkg --force-overwrite
2020-07-28 10:09:09,216 DEBUG creating statefile: '/var/log/dist-upgrade/apt-clone_system_state.tar.gz'
2020-07-28 10:09:16,481 DEBUG lsb-release: 'bionic'
2020-07-28 10:09:16,483 DEBUG _pythonSymlinkCheck run
2020-07-28 10:09:16,485 DEBUG openCache()
2020-07-28 10:09:16,486 DEBUG quirks: running PreCacheOpen
2020-07-28 10:09:16,486 DEBUG running Quirks.PreCacheOpen
2020-07-28 10:09:17,396 DEBUG /openCache(), new cache size 98697
2020-07-28 10:09:17,397 DEBUG need_server_mode(): run in 'desktop' mode, (because of pkg 'ubuntu-desktop')
2020-07-28 10:09:17,397 DEBUG checkViewDepends()
2020-07-28 10:09:17,404 DEBUG running doUpdate() (showErrors=False)
2020-07-28 10:09:31,068 DEBUG openCache()
2020-07-28 10:09:35,332 DEBUG /openCache(), new cache size 98697
2020-07-28 10:09:35,332 DEBUG doPostInitialUpdate
2020-07-28 10:09:35,332 DEBUG quirks: running focalPostInitialUpdate
2020-07-28 10:09:35,332 DEBUG running Quirks.focalPostInitialUpdate
2020-07-28 10:09:55,076 DEBUG Snap core18 is installed
2020-07-28 10:09:55,428 DEBUG Snap gnome-3-34-1804 is installed
2020-07-28 10:09:55,430 DEBUG Snap gnome-3-34-1804 is not tracking the release channel
2020-07-28 10:09:56,315 DEBUG Snap gtk-common-themes is installed
2020-07-28 10:09:57,012 DEBUG Snap gnome-3-28-1804 is installed
2020-07-28 10:09:57,052 DEBUG Snap gnome-3-28-1804 is being used by opera. Switching it to stable track
2020-07-28 10:09:57,434 DEBUG Snap gnome-calculator is installed
2020-07-28 10:09:57,831 DEBUG Snap gnome-characters is installed
2020-07-28 10:09:58,439 DEBUG Snap gnome-logs is installed
2020-07-28 10:10:03,311 DEBUG MetaPkgs: ubuntu-desktop
2020-07-28 10:10:08,372 DEBUG Foreign: 
2020-07-28 10:10:08,372 DEBUG Obsolete: dus guidus mkusb mkusb-common mkusb-nox mkusb-plug realvnc-vnc-viewer usb-pack-efi zoom
2020-07-28 10:10:08,373 DEBUG updateSourcesList()
2020-07-28 10:10:08,584 DEBUG rewriteSourcesList() with mirror_check
2020-07-28 10:10:08,585 DEBUG ['ubuntu-minimal', 'ubuntu-standard']
2020-07-28 10:10:08,585 DEBUG Checking pkg: ubuntu-minimal
2020-07-28 10:10:08,587 DEBUG Checking pkg: ubuntu-standard
2020-07-28 10:10:08,589 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu bionic main restricted'
2020-07-28 10:10:08,590 DEBUG verifySourcesListEntry: deb http://archive.ubuntu.com/ubuntu focal main restricted
2020-07-28 10:10:08,590 DEBUG url_downloadable: http://archive.ubuntu.com/ubuntu/dists/focal/Release
2020-07-28 10:10:08,590 DEBUG s='http' n='archive.ubuntu.com' p='/ubuntu/dists/focal/Release' q='' f=''
2020-07-28 10:10:08,985 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu focal main restricted' updated to new dist
2020-07-28 10:10:08,985 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu bionic-updates main restricted'
2020-07-28 10:10:08,986 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu focal-updates main restricted' updated to new dist
2020-07-28 10:10:08,986 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu bionic universe'
2020-07-28 10:10:08,987 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu focal universe' updated to new dist
2020-07-28 10:10:08,987 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu bionic-updates universe'
2020-07-28 10:10:08,987 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu focal-updates universe' updated to new dist
2020-07-28 10:10:08,988 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu bionic multiverse'
2020-07-28 10:10:08,988 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu focal multiverse' updated to new dist
2020-07-28 10:10:08,988 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu bionic-updates multiverse'
2020-07-28 10:10:08,989 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu focal-updates multiverse' updated to new dist
2020-07-28 10:10:08,989 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu bionic-backports main restricted universe multiverse'
2020-07-28 10:10:08,989 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu focal-backports main restricted universe multiverse' updated to new dist
2020-07-28 10:10:08,989 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu bionic-security main restricted'
2020-07-28 10:10:08,990 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu focal-security main restricted' updated to new dist
2020-07-28 10:10:08,990 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu bionic-security universe'
2020-07-28 10:10:08,990 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu focal-security universe' updated to new dist
2020-07-28 10:10:08,990 DEBUG examining: 'deb http://archive.ubuntu.com/ubuntu bionic-security multiverse'
2020-07-28 10:10:08,991 DEBUG entry 'deb http://archive.ubuntu.com/ubuntu focal-security multiverse' updated to new dist
2020-07-28 10:10:08,996 DEBUG running doUpdate() (showErrors=True)
2020-07-28 10:11:04,292 DEBUG openCache()
2020-07-28 10:11:04,915 DEBUG /openCache(), new cache size 65937
2020-07-28 10:11:04,915 DEBUG need_server_mode(): run in 'desktop' mode, (because of pkg 'ubuntu-desktop')
2020-07-28 10:11:04,916 DEBUG quirks: running PreDistUpgradeCache
2020-07-28 10:11:04,916 DEBUG running Quirks.PreDistUpgradeCache
2020-07-28 10:11:04,916 INFO installing python-is-python2 because python-minimal was installed
2020-07-28 10:11:04,916 DEBUG Installing 'python-is-python2' (python-minimal was installed on the system)
2020-07-28 10:11:05,154 ERROR Dist-upgrade failed: 'E:Unable to correct problems, you have held broken packages.'
2020-07-28 10:11:05,165 DEBUG abort called
2020-07-28 10:11:05,166 DEBUG openCache()
2020-07-28 10:11:08,454 DEBUG /openCache(), new cache size 98697