Confusing error message in case of layout-related syntax error

[Manuel M. T. Chakravarty]

For 

  foo = let
          x = (1, 2
          y = 3
        in
        fst x + y

GHC 4.04 gives me

  Main.hs:3: parse error on input `'

Interesting, but not very informative ;-)

I also have the feeling that GHC is sometimes off by a
couple of lines when reporting errors in bigger modules -
but I don't have a good example yet.

Manuel