Comment 1 for bug 990636

The answer is yes, it completely messed up a whole bunch of things. I manually managed to get to a working state but I most likely need to do a fresh install at this point.

Because one of the packages that failed was initramfs-tools, and because I apparently had casper installed (courtesy of remastersys, which I used to create a backup before I upgraded) it's possible this bug is related to bug #984276