Bug#614249: britney2: insufficient removal checks

["Adam D. Barratt" <adam@adam-barratt.org.uk>]

On Tue, 2011-03-01 at 23:38 +0000, Adam D. Barratt wrote:
> Self-cluestick: b2 already has a get_full_tree method which iterates
> reverse-dependency lists, so we should just use that.  Updated patch
> coming to a b2 tree near you soon.

Actually, it looks like get_full_tree() is hugely overkill in this case.
Purely building the complete list of affected packages when considering
debianutils takes several minutes (I have to admit I got bored and
cancelled the run after five minutes of no obvious activity) whereas
with my admittedly less elegant patch the whole run takes less than
that.

Regards,

Adam