[Haskell-cafe] How to deal with last item with concatMapAccumC in Conduit.

Dear cafes I use Conduit to parse a huge file. And I need merge lines by condition. I find the concatMapAccumC can do that and I write a demo as blow(with conduit-combinators-1.0.6,lts-6.18). The problem is if the last item didn’t make condition true, the data only keep in the accum but missing in stream. Any one can give me some advises? Thanks ---------------------------- import Conduit test'::Int->Int->(Int,[Int]) test' a s = case (a+s) > 5 of True -> (0,[a+s]) False -> (a+s,[]) testlog::IO [Int] testlog = runConduit $ (yieldMany [1,2,3,4,5,6,3]) $= (concatMapAccumC test' 0 ) $$ sinkList