ls-dbus-backend crashed with TabError in unknown(): inconsistent use of tabs and spaces in indentation

Status changed to 'Confirmed' because the bug affects multiple users.

I am running Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120521) too.
I have installed Japanese, Traditional Chinese, Simplified Chinese and Korean with Language Support.
My system language is Japanese.

Today the same error occurred as soon as the desktop finished loading.
I did not do any operations like moving pointing device or hitting keyboard.

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1014429

Seems to be some bad/mixed indendation, even if it should jsut give a warn instead of an error.

----
python -tt -m py_compile ls-dbus-backend
TabError: ('inconsistent use of tabs and spaces in indentation', ('ls-dbus-backend', 25, 60, ' self._datadir = "/usr/share/language-selector/"\n'))
TabError: ('inconsistent use of tabs and spaces in indentation', ('ls-dbus-backend', 26, 57, " self._re_locale = re.compile(r'^[\\w.@:-]+$')\n"))
TabError: ('inconsistent use of tabs and spaces in indentation', ('ls-dbus-backend', 110, 35, '\tserver = LanguageSelectorServer()\n'))
TabError: ('inconsistent use of tabs and spaces in indentation', ('ls-dbus-backend', 111, 26, '\tgobject.MainLoop().run()\n'))
----

Apply with

patch ls-dbus-backend patch.txt

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Got this crash on Quantal i386 logged as gnome-classic

this has happened because i've killed the endless looping started by "apply to whole system" to set my language

*****
Title: ls-dbus-backend crashed with TabError in unknown(): inconsistent use of tabs and spaces in indentation
Traceback:
 File "/usr/lib/language-selector/ls-dbus-backend", line 25
     self._datadir = "/usr/share/language-selector/"
                                                   ^
 TabError: inconsistent use of tabs and spaces in indentation

*****
before this crash, i've had a first one (dupe of bug #1013996)

more comment about the process killed noted above into post #7: it has been killed via System Monitor process.

This affect me. Ubuntu 12.10 Alpha 3.

This bug was fixed in the package language-selector - 0.85

---------------
language-selector (0.85) quantal; urgency=low

  * ls-dbus-backend: fix for python3 compatibility. LP: #1014429.
  * Do not touch /etc/environment; we should be updating /etc/default/locale
    exclusively. On upgrade, clean up any references that have been left
    behind in /etc/environment. LP: #1035498.
 -- Steve Langasek <email address hidden> Fri, 10 Aug 2012 22:06:35 -0700