/usr/local/bin/bsfilter:681:in `[]=': sdbm_store failed (SDBMError)
from /usr/local/bin/bsfilter:681:in `set'
from /usr/local/bin/bsfilter:450:in `set_scalar'
from /usr/local/bin/bsfilter:1856:in `block in update_probability'
from /usr/local/bin/bsfilter:1845:in `each'
from /usr/local/bin/bsfilter:1845:in `update_probability'
from /usr/local/bin/bsfilter:3429:in `block in run'
from /usr/local/bin/bsfilter:3426:in `each'
from /usr/local/bin/bsfilter:3426:in `run'
from /usr/local/bin/bsfilter:3493:in `<main>'