Stream.hs:9:5-13: error: …
    • Couldn't match expected type ‘streaming-0.2.3.1:Data.Functor.Of.Of
                                      Int ()’
                  with actual type ‘Of Int ()’
      NB: ‘Of’
            is defined in ‘Data.Functor.Of’ in package ‘streaming-0.2.3.1’
          ‘streaming-0.2.3.1:Data.Functor.Of.Of’
            is defined in ‘Data.Functor.Of’ in package ‘streaming-0.2.3.1’
    • In the pattern: len :> ()
      In a stmt of a 'do' block:
        (len :> ()) <- BS.readFile fIn & BS.copy & BS.length
                         & BS.writeFile fOut
      In the second argument of ‘($)’, namely
        ‘do (len :> ()) <- BS.readFile fIn & BS.copy & BS.length
                             & BS.writeFile fOut
            pure $ len’
  |
Compilation failed.