I've upgraded emacs-common on both of my computers without issue, so the issue that the OP is experiencing may be unique to the elpa-htmlize package, which I do not have installed on either of my computers.
- Bug#1017798: emacs-common can't be installed: segfault in post... Akkana Peck
- Bug#1017798: emacs-common can't be installed Kurt Meyer
- Bug#1017798: emacs-el Eugen Dedu