[Bug 1186936] Re: do-release-upgrade -d crash when trying to upgrade to saucy

[Mitsutoshi NAKANO]

I performed update-manager on 2013-July-06 .
The update-manager said "Software Updater
Not all updates can be installed

Run a partial upgrade, to install as many updates as possible.

This can be cased by:
* A previous upgrade which didn't complete
* Problems with some of the installed software
* Unofficial software packages not provided by Ubuntu
* Normal changes of a pre-releaes version of Ubuntu"

So I selected "Partial Upgrade" .

Then update-manager said "
Could not calculate the upgrade

An unresolvable problem occurred while calculating the upgrade:
The package 'ubuntu-desktop' is marked for removal but it is in the removal blacklist.

This can be caused by:
* Upgrading to a pre-releae version of Ubuntu
* Running the current pre-relase version of Ubuntu
* Unofficial software packages not provided by Ubuntu

This is most likely a transient problem, please try again later ."

Then I selected "Close" .
Then do-release-upgrade crashed and https://bugs.launchpad.net/bugs/1194870 opened  but I coulud not see this report .
Then searched launchpad with "saucy do-release-upgrade update-manager" .
And I found this report .

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https://bugs.launchpad.net/bugs/1186936

Title:
  do-release-upgrade -d crash when trying to upgrade to saucy

Status in “ubuntu-release-upgrader” package in Ubuntu:
  Confirmed

Bug description:
  while trying to upgrade to saucy from raring, do-release-upgrade is
  crashing with the following stack-trace:

  Traceback (most recent call last):
    File "/tmp/ubuntu-release-upgrader-jpqsq1/saucy", line 10, in <module>
      sys.exit(main())
    File "/tmp/ubuntu-release-upgrader-jpqsq1/DistUpgrade/DistUpgradeMain.py", line 240, in main
      if app.run():
    File "/tmp/ubuntu-release-upgrader-jpqsq1/DistUpgrade/DistUpgradeController.py", line 1781, in run
      return self.fullUpgrade()
    File "/tmp/ubuntu-release-upgrader-jpqsq1/DistUpgrade/DistUpgradeController.py", line 1676, in fullUpgrade
      if not self.updateSourcesList():
    File "/tmp/ubuntu-release-upgrader-jpqsq1/DistUpgrade/DistUpgradeController.py", line 750, in updateSourcesList
      if not self.rewriteSourcesList(mirror_check=True):
    File "/tmp/ubuntu-release-upgrader-jpqsq1/DistUpgrade/DistUpgradeController.py", line 726, in rewriteSourcesList
      logging.debug("entry '%s' was disabled (unknown mirror)" % get_string_with_no_auth_from_source_entry(entry))
    File "/tmp/ubuntu-release-upgrader-jpqsq1/DistUpgrade/utils.py", line 89, in get_string_with_no_auth_from_source_entry
      return str(tmp)
    File "/tmp/ubuntu-release-upgrader-jpqsq1/DistUpgrade/sourceslist.py", line 215, in __str__
      return self.str().strip()
    File "/tmp/ubuntu-release-upgrader-jpqsq1/DistUpgrade/sourceslist.py", line 233, in str
      line += " #"+self.comment
  UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 4: ordinal not in range(128)

  My python env is the following:
  /usr/bin/env python
  Python 2.7.4 (default, Apr 19 2013, 18:28:01)
  --- 
  ApportVersion: 2.9.2-0ubuntu8.1
  Architecture: amd64
  CrashDB: ubuntu
  DistroRelease: Ubuntu 13.04
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2013-04-08 (55 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  MarkForUpload: True
  Package: ubuntu-release-upgrader (not installed)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  Tags:  raring dist-upgrade
  Uname: Linux 3.9.0-030900rc8-generic x86_64
  UpgradeStatus: Upgraded to raring on 2013-06-03 (0 days ago)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  VarLogDistupgradeAptlog:
   Log time: 2013-06-03 10:13:39.019360
   Log time: 2013-06-03 10:13:43.919537

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