I just had the same error during upgrade from kubuntu 14.10 to 15.04. In my case, it was the file /etc/php5/fpm/pool.d/www.conf, but I don't think that matters. The stacktrace in main.log is the same as yours, including the line numbers are equal.
Like you I had to kill the dpkg process and then do a manual dpkg --configure -a which did a lot of things and asked me about file differences. Afterwards I ran apt-get dist-upgrade but this reported only packages that could be removed. I did so with apt-get autoremove. I hope this is basically what the upgrader would do, I tried to look around the source code a bit, but I couldn't really figure out what it does. I believe this is a very serious bug as it prevents people from upgrading and without enough knowledge on how to proceed from there they are stuck with a broken system! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1448380 Title: 15.04 installer hung in configure step with exception in DistUpgradeViewKDE.py To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1448380/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
