2019-12-10 16:07:47,117 INFO Using config files '['./DistUpgrade.cfg.xenial']'
2019-12-10 16:07:47,118 INFO uname information: 'Linux feijch-ThinkPad-X220 4.15.0-72-generic #81~16.04.1-Ubuntu SMP Tue Nov 26 16:34:21 UTC 2019 x86_64'
2019-12-10 16:07:47,495 INFO apt version: '1.2.32'
2019-12-10 16:07:47,495 INFO python version: '3.5.2 (default, Oct  8 2019, 13:06:37) 
[GCC 5.4.0 20160609]'
2019-12-10 16:07:47,502 INFO release-upgrader version '18.04.36' started
2019-12-10 16:07:47,578 INFO locale: 'zh_CN' 'UTF-8'
2019-12-10 16:07:47,912 DEBUG Using 'DistUpgradeViewGtk3' view
2019-12-10 16:07:47,972 DEBUG enable dpkg --force-overwrite
2019-12-10 16:07:47,994 DEBUG creating statefile: '/var/log/dist-upgrade/apt-clone_system_state.tar.gz'
2019-12-10 16:07:52,471 DEBUG lsb-release: 'xenial'
2019-12-10 16:07:52,473 DEBUG _pythonSymlinkCheck run
2019-12-10 16:07:52,474 DEBUG openCache()
2019-12-10 16:07:52,475 DEBUG No such plugin directory: ./plugins
2019-12-10 16:07:52,475 DEBUG plugins for condition 'PreCacheOpen' are '[]'
2019-12-10 16:07:52,475 DEBUG plugins for condition 'bionicPreCacheOpen' are '[]'
2019-12-10 16:07:52,475 DEBUG plugins for condition 'from_xenialPreCacheOpen' are '[]'
2019-12-10 16:07:52,475 DEBUG quirks: running PreCacheOpen
2019-12-10 16:07:52,476 DEBUG running Quirks.PreCacheOpen
2019-12-10 16:07:53,067 DEBUG /openCache(), new cache size 90291
2019-12-10 16:07:53,067 DEBUG need_server_mode(): run in 'desktop' mode, (because of pkg 'ubuntu-desktop')
2019-12-10 16:07:53,067 DEBUG checkViewDepends()
2019-12-10 16:07:53,068 DEBUG running doUpdate() (showErrors=False)
2019-12-10 16:07:54,164 DEBUG openCache()
2019-12-10 16:07:54,776 DEBUG /openCache(), new cache size 90291
2019-12-10 16:07:54,776 DEBUG doPostInitialUpdate
2019-12-10 16:07:54,776 DEBUG plugins for condition 'PostInitialUpdate' are '[]'
2019-12-10 16:07:54,777 DEBUG plugins for condition 'bionicPostInitialUpdate' are '[]'
2019-12-10 16:07:54,777 DEBUG plugins for condition 'from_xenialPostInitialUpdate' are '[]'
2019-12-10 16:07:54,777 DEBUG quirks: running bionicPostInitialUpdate
2019-12-10 16:07:54,777 DEBUG running Quirks.bionicPostInitialUpdate
2019-12-10 16:07:59,803 DEBUG abort called
2019-12-10 16:07:59,805 DEBUG openCache()
2019-12-10 16:08:00,408 DEBUG /openCache(), new cache size 90291