garbled error message

With the attached files, I get an apparently garbled error message
during compilation.

buzzard(105)% make
ghc --make -package data -package concurrent -package posix Data
ghc-5.04.2: chasing modules from: Data
Compiling Repr             ( Repr.hs, Repr.o )
Compiling Data             ( Data.hs, ./Data.o )

Data.hs:288:
    Could not deduce (ReprType r t) from the context ()
    Probable fix:
        Add (ReprType r t)
        to the When generalising the type of an expression
    arising from use of `getter'' at Data.hs:288
    In the first argument of `runDR', namely `(getter' repr)'
    When checking the type signature of the expression:
          runDR (getter' repr) "..." 0 rContents :: forall t. CC t
*** Error code 1
make: Fatal error: Command failed for target `default'

Repr.hs
Description: application/unknown-content-type-haskellfile

Data.hs
Description: application/unknown-content-type-haskellfile

default:
        ghc --make -package data -package concurrent -package posix Data