Technically, the failure is trigged by the "set -e" of the maintainer script, since dbc_go fails.
This is by no means a failure of the phpbb3 package, only a consequence of the failure of dbconfig-common. As far as debconf is concerned, people use "db_go || true" -- I have seen no such call for dbc_go, however s9y uses an if-construct to achieve the same goal, I believe. However, in this case, I wonder why dbconfig-common failed -- there should be a question if it is supposed to be used at all for that package, which probably is what the bug reporter intended to (not) do, and if properly answered with "No" it would not have been used and therefore not have produced any errors -- not sure how piuparts handles the part of configuring the package for test. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org