Confusing parse error when forgetting "deriving"

This code:

module Main where

data Foo
    = Foo
    { f_x :: Int
    , f_y :: Int
    } (Eq, Show)

Produces this error message:

foo.hs:5:7: Not in scope: `f_x'

foo.hs:6:7: Not in scope: `f_y'

I'm not sure how easy it is to improve the error message; but a "Not in scope" seems very confusing to me...

Trac metadata

Trac field	Value
Version	7.6.3
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
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