upgrade 12.10 -> 13.04 fails : new libpython2.7-minimal used during upgrade while libpython2.7-stdlib is not yet unpacked and configured.

[svenmeier]

On upgrading from quantal to rairing the terminal stops with "Error in function:"

Last output:
Running hooks in /etc/ca-certificate/update.d....
Adding debian:Actalis_Authentication_Root_CA.pem
Adding debian:Bypass_Class_2_Root_CA.pem
Adding debian:Bypass_Class_3_Root_CA.pem
Adding debian:EE_Certification_Centre_Root_CA:pem
Adding debian:StartCom_Certification_Authority_G2.pem
Adding debian:Trustis_FPS_Root_CA.pem
Adding debian:T-TeleSec_GlobalRoot_Class_3.pem
done.
done.
Processing triggers for ureadahead ...
Processing triggers for dictionaries-common ...
Processing triggers for libreoffice_common ...
Error in function:

A popup show:
The problem cannot be reported:

The problem happened with the program /usr/lib/i386-linux-gnu/gdk-pixbuf-2.0/gdk-pixbuf-query-loaders which changed since the crash occurred.

[Brian Murray (brian-murray)]

Thanks for taking the time to report this bug and helping to make Ubuntu better. Could you please add the log files from '/var/log/dist-upgrade/' to this bug report as separate attachments? Thanks in advance.

[Jean-Baptiste Lallement (jibel)]

Error from the logs:
= = = = =
Processing triggers for gconf2 ...
Traceback (most recent call last):
  File "/usr/bin/update-gconf-defaults", line 9, in <module>
    import os,tempfile,shutil,sys
  File "/usr/lib/python2.7/tempfile.py", line 32, in <module>
    import io as _io
ImportError: No module named io
Error in sys.excepthook:
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/apport_python_hook.py", line 64, in apport_excepthook
    from apport.fileutils import likely_packaged, get_recent_crashes
  File "/usr/lib/python2.7/dist-packages/apport/__init__.py", line 4, in <module>
    from apport.report import Report
  File "/usr/lib/python2.7/dist-packages/apport/report.py", line 12, in <module>
    import subprocess, tempfile, os.path, re, pwd, grp, os
  File "/usr/lib/python2.7/tempfile.py", line 32, in <module>
    import io as _io
ImportError: No module named io

Original exception was:
Traceback (most recent call last):
  File "/usr/bin/update-gconf-defaults", line 9, in <module>
    import os,tempfile,shutil,sys
  File "/usr/lib/python2.7/tempfile.py", line 32, in <module>
    import io as _io
ImportError: No module named io
dpkg: error processing gconf2 (--unpack):
 subprocess installed post-installation script returned error exit status 1
= = = = =

[Jean-Baptiste Lallement (jibel)]

The problem is that the following events happens:
= = = = =
Selecting previously unselected package libpython2.7-minimal:amd64.
Unpacking libpython2.7-minimal:amd64 (from .../libpython2.7-minimal_2.7.4~rc1-4ubuntu1_amd64.deb) ...
Replacing files in old package python2.7-minimal ...
Preparing to replace python2.7-minimal 2.7.3-5ubuntu4 (using .../python2.7-minimal_2.7.4~rc1-4ubuntu1_amd64.deb) ...
Unpacking replacement python2.7-minimal ...
Processing triggers for gconf2 ...
dpkg: error processing gconf2 (--unpack):
 gconf2
Preparing to replace gconf2-common 3.2.5-0ubuntu4 (using .../gconf2-common_3.2.6-0ubuntu1_all.deb) ...
Unpacking replacement gconf2-common ...
Preparing to replace libgconf2-4:amd64 3.2.5-0ubuntu4 (using .../libgconf2-4_3.2.6-0ubuntu1_amd64.deb) ...
Unpacking replacement libgconf2-4:amd64 ...
Preparing to replace gconf2 3.2.5-0ubuntu4 (using .../gconf2_3.2.6-0ubuntu1_amd64.deb) ...
Unpacking replacement gconf2 ...
Setting up gconf2-common (3.2.6-0ubuntu1) ...
Selecting previously unselected package libpython2.7-stdlib:amd64.
Unpacking libpython2.7-stdlib:amd64 (from .../libpython2.7-stdlib_2.7.4~rc1-4ubuntu1_amd64.deb) ...
= = = = =

So in this case, the trigger for gconf2 will use modules from the new libpython2.7-minimal which requires libpython2.7-stdlib while libpython2.7-stdlib is not yet unpacked and configured. This is not specific to gconf2 and should be reproducible with other pacakges.

[Launchpad Janitor (janitor)]

This bug was fixed in the package python2.7 - 2.7.4-1ubuntu3

---------------
python2.7 (2.7.4-1ubuntu3) raring; urgency=low

  * Add the io and _io modules to libpython2.7-minimal. LP: #1165172.
  * Add missing import for the ssl module. LP: #1166644.
 -- Matthias Klose <email address hidden> Tue, 09 Apr 2013 12:11:12 +0200

[svenmeier (sven-meiers)]

What can I do complete the upgrade on my system? Is there an option to re-run the upgrade?

[Steve Langasek (vorlon)]

On Tue, Apr 09, 2013 at 08:08:01PM -0000, svenmeier wrote:
> What can I do complete the upgrade on my system? Is there an option to
> re-run the upgrade?

A manual run of 'sudo apt-get -f install' followed by 'sudo apt-get
dist-upgrade' from the commandline is your best bet.