Parse error with two contiguous haddock comment lines

[harendra-kumar]

The following code trips haddock parser:

{-|-}
-- |
module Main
  where
main = return ()

With this error:

haddock2.hs:2:1: parse error on input `-- |'

Even two contiguous lines having {-|-} trips the parser. But two contiguous lines having "-- |" works ok.