upgrade from 13.04 to 13.10 failed after upgrading from 12.10 to 13.04

[Jeff Shapiro]

Error message from the updater:
The upgrade has aborted. Your system could be in an unusable state. A recovery will run now (dpkg --configure -a).

Please report this bug in a browser at http://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+filebug and attach the files in /var/log/dist-upgrade/ to the bug report.
installArchives() failed

I upgraded from 12.10 to 13.04, which seemed to work ok. After a reboot I started the upgrade to 13.10. The software updater reported that I was up to date before offering the upgrade to 13.10.

The dpkg --configure -a does not seem to have done anything.

The updater also reported that Apache2 and libapache2-mod-svn failed to upgrade to 13.10

[Brian Murray (brian-murray)]

The errors seem related to your install and configuration of apache:

Setting up libapache2-mod-svn (1.7.9-1+nmu6ubuntu3) ...^M
apache2_invoke dav_svn: already enabled^M
Action 'configtest' failed.^M
The Apache error log may have more information.^M
apache2_reload: Your configuration is broken. Not restarting Apache 2^M
dpkg: error processing libapache2-mod-svn (--configure):^M
 subprocess installed post-installation script returned error exit status 1^M
dpkg: dependency problems prevent configuration of libapache2-svn:^M
 libapache2-svn depends on libapache2-mod-svn; however:^M
  Package libapache2-mod-svn is not configured yet.^M
^M
dpkg: error processing libapache2-svn (--configure):^M
 dependency problems - leaving unconfigured^M