[Bug 1874250] Re: do-release-upgrade fails 19.10->20.04 AttributeError: 'UbuntuDistroInfo' object has no attribute 'version'

[Jaroslaw Smorczewski]

*** This bug is a duplicate of bug 1848829 ***
    https://bugs.launchpad.net/bugs/1848829

it would be a greater help if someone could attach DistroInfo object
code here. The of which works of course, the fix of this issue is quite
obvious but it require help from those who have no issue.

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https://bugs.launchpad.net/bugs/1874250

Title:
  do-release-upgrade fails 19.10->20.04 AttributeError:
  'UbuntuDistroInfo' object has no attribute 'version'

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

Bug description:
  ➜  ~ sudo do-release-upgrade -d
  Checking for a new Ubuntu release
  Get:1 Upgrade tool signature [1554 B]
  Get:2 Upgrade tool [1344 kB]
  Fetched 1346 kB in 0s (0 B/s)
  authenticate 'focal.tar.gz' against 'focal.tar.gz.gpg'
  extracting 'focal.tar.gz'
                                                                                                               81,25         Bot
  Building dependency tree
  Reading state information... Done

  Traceback (most recent call last):
    File "/tmp/ubuntu-release-upgrader-dtwszzo7/DistUpgrade/DistUpgradeQuirks.py", line 186, in _get_from_and_to_version
      di.version('%s' % self.controller.fromDist).split()[0]
  AttributeError: 'UbuntuDistroInfo' object has no attribute 'version'

  During handling of the above exception, another exception occurred:

  Traceback (most recent call last):
    File "/tmp/ubuntu-release-upgrader-dtwszzo7/focal", line 8, in <module>
      sys.exit(main())
    File "/tmp/ubuntu-release-upgrader-dtwszzo7/DistUpgrade/DistUpgradeMain.py", line 238, in main
      if app.run():
    File "/tmp/ubuntu-release-upgrader-dtwszzo7/DistUpgrade/DistUpgradeController.py", line 2082, in run
      return self.fullUpgrade()
    File "/tmp/ubuntu-release-upgrader-dtwszzo7/DistUpgrade/DistUpgradeController.py", line 1919, in fullUpgrade
      if not self.doPostInitialUpdate():
  # cleanup[1] sre_constants
  # cleanup[1] re
  # cleanup[1] _codecs
  # cleanup[1] _warnings
  # cleanup[1] zipimport
  # cleanup[1] _sysconfigdata
  # cleanup[1] encodings.utf_8
  # cleanup[1] codecs
  # cleanup[1] readline
  # cleanup[1] _sysconfigdata_nd
  # cleanup[1] _locale
  # cleanup[1] sitecustomize
  # cleanup[1] signal
  # cleanup[1] traceback
  # cleanup[1] posix
  # cleanup[1] encodings.aliases
  # cleanup[1] exceptions
  # cleanup[1] _weakref
  # cleanup[1] sre_compile
  # cleanup[1] _sre
  # cleanup[1] sre_parse
  # cleanup[2] copy_reg
  # cleanup[2] posixpath
  # cleanup[2] errno
  # cleanup[2] _abcoll
  # cleanup[2] types
  # cleanup[2] genericpath
  # cleanup[2] stat
  # cleanup[2] warnings
  # cleanup[2] UserDict
  # cleanup[2] os.path
  # cleanup[2] linecache
  # cleanup[2] os
  # cleanup sys
  # cleanup __builtin__
  # cleanup ints: 19 unfreed ints
  # cleanup floats
  ➜  ~ type python
  python is /usr/bin/python
  ➜  ~ sudo do-release-upgrade -d
  Checking for a new Ubuntu release
  Get:1 Upgrade tool signature [1554 B]
  Get:2 Upgrade tool [1344 kB]
  Fetched 1346 kB in 0s (0 B/s)
  authenticate 'focal.tar.gz' against 'focal.tar.gz.gpg'
  extracting 'focal.tar.gz'

  ProblemType: Bug
  DistroRelease: Ubuntu 19.10
  Package: ubuntu-release-upgrader-core 1:19.10.15.4
  ProcVersionSignature: Ubuntu 5.3.0-46.38-generic 5.3.18
  Uname: Linux 5.3.0-46-generic x86_64
  ApportVersion: 2.20.11-0ubuntu8.8
  Architecture: amd64
  CrashDB: ubuntu
  Date: Wed Apr 22 12:02:00 2020
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to eoan on 2020-04-22 (0 days ago)
  VarLogDistupgradeAptclonesystemstate.tar.gz:
   Error: command ['pkexec', 'cat', '/var/log/dist-upgrade/apt-clone_system_state.tar.gz'] failed with exit code 127: polkit-agent-helper-1: error response to PolicyKit daemon: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: No session for cookie
   Error executing command as another user: Not authorized
   
   This incident has been reported.
  VarLogDistupgradeAptlog:
   Log time: 2020-04-22 11:57:30.093261
   Log time: 2020-04-22 11:57:32.463320
  mtime.conffile..etc.update-manager.release-upgrades: 2019-03-06T13:00:00.153336

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