2020-09-29 01:01:45,447 INFO Using config files '['./DistUpgrade.cfg.bionic']'
2020-09-29 01:01:45,447 INFO uname information: 'Linux philip-ThinkPad-T520 4.15.0-118-generic #119-Ubuntu SMP Tue Sep 8 12:30:01 UTC 2020 x86_64'
2020-09-29 01:01:45,917 INFO apt version: '1.6.12ubuntu0.1'
2020-09-29 01:01:45,917 INFO python version: '3.6.9 (default, Jul 17 2020, 12:50:27) 
[GCC 8.4.0]'
2020-09-29 01:01:45,921 INFO release-upgrader version '20.04.25' started
2020-09-29 01:01:45,932 INFO locale: 'en_CA' 'UTF-8'
2020-09-29 01:01:45,992 INFO screen could not be run
2020-09-29 01:01:46,033 DEBUG Using 'DistUpgradeViewText' view
2020-09-29 01:01:46,093 DEBUG enable dpkg --force-overwrite
2020-09-29 01:01:46,137 DEBUG creating statefile: '/var/log/dist-upgrade/apt-clone_system_state.tar.gz'
2020-09-29 01:01:51,029 DEBUG lsb-release: 'bionic'
2020-09-29 01:01:51,030 DEBUG _pythonSymlinkCheck run
2020-09-29 01:01:51,031 DEBUG openCache()
2020-09-29 01:01:51,031 DEBUG quirks: running PreCacheOpen
2020-09-29 01:01:51,031 DEBUG running Quirks.PreCacheOpen
2020-09-29 01:01:52,466 DEBUG Comparing 4.15.0-117 with 
2020-09-29 01:01:52,466 DEBUG Comparing 4.15.0-118 with 4.15.0-117
2020-09-29 01:01:52,901 DEBUG /openCache(), new cache size 99750
2020-09-29 01:01:52,901 DEBUG need_server_mode(): run in 'desktop' mode, (because of key deps for 'ubuntu-desktop')
2020-09-29 01:01:52,901 DEBUG checkViewDepends()
2020-09-29 01:01:52,903 DEBUG running doUpdate() (showErrors=False)
2020-09-29 01:01:59,036 DEBUG openCache()
2020-09-29 01:02:00,499 DEBUG Comparing 4.15.0-117 with 
2020-09-29 01:02:00,499 DEBUG Comparing 4.15.0-118 with 4.15.0-117
2020-09-29 01:02:00,953 DEBUG /openCache(), new cache size 99750
2020-09-29 01:02:00,953 DEBUG doPostInitialUpdate
2020-09-29 01:02:00,954 DEBUG quirks: running focalPostInitialUpdate
2020-09-29 01:02:00,954 DEBUG running Quirks.focalPostInitialUpdate
2020-09-29 01:02:05,899 DEBUG MetaPkgs: 
2020-09-29 01:02:10,786 DEBUG Foreign: 
2020-09-29 01:02:10,786 DEBUG Obsolete: brave-browser brave-keyring code
2020-09-29 01:02:10,787 DEBUG updateSourcesList()
2020-09-29 01:02:10,798 DEBUG rewriteSourcesList() with mirror_check
2020-09-29 01:02:10,798 DEBUG ['ubuntu-minimal', 'ubuntu-standard']
2020-09-29 01:02:10,798 DEBUG Checking pkg: ubuntu-minimal
2020-09-29 01:02:10,801 DEBUG Checking pkg: ubuntu-standard
2020-09-29 01:02:10,804 DEBUG examining: 'deb http://ca.archive.ubuntu.com/ubuntu/ bionic main restricted'
2020-09-29 01:02:10,804 DEBUG verifySourcesListEntry: deb http://ca.archive.ubuntu.com/ubuntu/ focal main restricted
2020-09-29 01:02:10,804 DEBUG url_downloadable: http://ca.archive.ubuntu.com/ubuntu//dists/focal/Release
2020-09-29 01:02:10,804 DEBUG s='http' n='ca.archive.ubuntu.com' p='/ubuntu//dists/focal/Release' q='' f=''
2020-09-29 01:02:10,972 DEBUG entry 'deb http://ca.archive.ubuntu.com/ubuntu/ focal main restricted' updated to new dist
2020-09-29 01:02:10,973 DEBUG examining: 'deb http://ca.archive.ubuntu.com/ubuntu/ bionic-updates main restricted'
2020-09-29 01:02:10,973 DEBUG entry 'deb http://ca.archive.ubuntu.com/ubuntu/ focal-updates main restricted' updated to new dist
2020-09-29 01:02:10,973 DEBUG examining: 'deb http://ca.archive.ubuntu.com/ubuntu/ bionic universe'
2020-09-29 01:02:10,974 DEBUG entry 'deb http://ca.archive.ubuntu.com/ubuntu/ focal universe' updated to new dist
2020-09-29 01:02:10,974 DEBUG examining: 'deb http://ca.archive.ubuntu.com/ubuntu/ bionic-updates universe'
2020-09-29 01:02:10,974 DEBUG entry 'deb http://ca.archive.ubuntu.com/ubuntu/ focal-updates universe' updated to new dist
2020-09-29 01:02:10,975 DEBUG examining: 'deb http://ca.archive.ubuntu.com/ubuntu/ bionic multiverse'
2020-09-29 01:02:10,975 DEBUG entry 'deb http://ca.archive.ubuntu.com/ubuntu/ focal multiverse' updated to new dist
2020-09-29 01:02:10,975 DEBUG examining: 'deb http://ca.archive.ubuntu.com/ubuntu/ bionic-updates multiverse'
2020-09-29 01:02:10,975 DEBUG entry 'deb http://ca.archive.ubuntu.com/ubuntu/ focal-updates multiverse' updated to new dist
2020-09-29 01:02:10,976 DEBUG examining: 'deb http://ca.archive.ubuntu.com/ubuntu/ bionic-backports main restricted universe multiverse'
2020-09-29 01:02:10,976 DEBUG entry 'deb http://ca.archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse' updated to new dist
2020-09-29 01:02:10,976 DEBUG examining: 'deb http://archive.canonical.com/ubuntu bionic partner'
2020-09-29 01:02:10,977 DEBUG verifySourcesListEntry: deb http://archive.canonical.com/ubuntu focal partner
2020-09-29 01:02:10,977 DEBUG url_downloadable: http://archive.canonical.com/ubuntu/dists/focal/Release
2020-09-29 01:02:10,977 DEBUG s='http' n='archive.canonical.com' p='/ubuntu/dists/focal/Release' q='' f=''
2020-09-29 01:02:11,163 DEBUG entry 'deb http://archive.canonical.com/ubuntu focal partner' updated to new dist
2020-09-29 01:02:11,164 DEBUG examining: 'deb http://security.ubuntu.com/ubuntu bionic-security main restricted'
2020-09-29 01:02:11,164 DEBUG verifySourcesListEntry: deb http://security.ubuntu.com/ubuntu focal main restricted
2020-09-29 01:02:11,164 DEBUG url_downloadable: http://security.ubuntu.com/ubuntu/dists/focal/Release
2020-09-29 01:02:11,165 DEBUG s='http' n='security.ubuntu.com' p='/ubuntu/dists/focal/Release' q='' f=''
2020-09-29 01:02:11,484 DEBUG entry 'deb http://security.ubuntu.com/ubuntu focal-security main restricted' updated to new dist
2020-09-29 01:02:11,484 DEBUG examining: 'deb http://security.ubuntu.com/ubuntu bionic-security universe'
2020-09-29 01:02:11,485 DEBUG entry 'deb http://security.ubuntu.com/ubuntu focal-security universe' updated to new dist
2020-09-29 01:02:11,485 DEBUG examining: 'deb http://security.ubuntu.com/ubuntu bionic-security multiverse'
2020-09-29 01:02:11,485 DEBUG entry 'deb http://security.ubuntu.com/ubuntu focal-security multiverse' updated to new dist
2020-09-29 01:02:11,543 DEBUG running doUpdate() (showErrors=True)
2020-09-29 01:02:18,273 DEBUG openCache()
2020-09-29 01:02:19,291 DEBUG Comparing 4.15.0-117 with 
2020-09-29 01:02:19,291 DEBUG Comparing 4.15.0-118 with 4.15.0-117
2020-09-29 01:02:19,577 DEBUG /openCache(), new cache size 66347
2020-09-29 01:02:19,577 DEBUG need_server_mode(): run in 'desktop' mode, (because of key deps for 'ubuntu-desktop')
2020-09-29 01:02:19,578 DEBUG quirks: running PreDistUpgradeCache
2020-09-29 01:02:19,578 DEBUG running Quirks.PreDistUpgradeCache
2020-09-29 01:02:20,239 ERROR Dist-upgrade failed: 'E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.'
2020-09-29 01:02:20,240 DEBUG abort called
2020-09-29 01:02:20,241 DEBUG openCache()
2020-09-29 01:02:23,613 DEBUG Comparing 4.15.0-117 with 
2020-09-29 01:02:23,613 DEBUG Comparing 4.15.0-118 with 4.15.0-117
2020-09-29 01:02:24,060 DEBUG /openCache(), new cache size 99750