I've seen this exact error as well. I can say in the instance where I was asked to assist with troubleshooting the issue it was caused by performing the release upgrade when the root account had been enabled and the password had been allowed to expire. After changing the root password so that it was no longer expired the release upgrade completed without issue.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2076470 Title: package dhcpcd-base 1:10.0.6-1ubuntu3.1 failed to install/upgrade: new dhcpcd-base package post-installation script subprocess returned error exit status 82 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dhcpcd/+bug/2076470/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
