Hugs doesn't follow latest layout specification

In the following code snippet: f (x:xs) = "a" where f [] = "b" We have f [] => "b" -- in ghc and nhc98 and /latest/ Report f [] => Program error: {f []} -- in hugs It appears that Hugs has not been updated to follow the most current Haskell98 Report which explicates the layout rules in more detail. (Which specifies that the above 'where' construct should bind nothing rather than binding the "f [] = ...".) - Mark