ansible/ansible — pull request #6807 by bob-smith (2014-04-01 19:50:55+00:00)
Title: debconf to support 'error' vtype

http://manpages.ubuntu.com/manpages/quantal/man7/debconf-devel.7.html defines the 'error' type, which I've needed. Not sure why it isn't defined at http://www.debian.org/doc/packaging-manuals/debconf_specification.html