[nhc-users] Help needed with a compiling error

[Malcolm Wallace]

HP Wei <hp at rentec.com> wrote:

> Fail: superclassesI InfoUsedClass 52 [(Type class, Text.Printf.PrintfArg,
>                                       "ftnirP.txeT", 52:11-52:19)] ...

nhc98 is confused about whether the classes defined in Test.Printf are
necessary or not.  There is a workaround: explicit imports.  Replace

    import Text.Printf

with

    import Text.Printf (IsChar(),PrintfArg(),printf)

and everything will work OK.

Regards,
    Malcolm