Possible instances problem with ghc-6.2.1

With ghc-6.2.1 compiled from source

tar -xzf instances2.tar.gz
cd instances2
gmake

produces the message:

AttributesType.hs:15:
    Could not deduce (Show value)
        from the context (AttributeValue (Radio value),
                          HasConfigRadioButton value,
                          Bounded value,
                          Enum value,
                          FormLabel label)
      arising from use of `newFormEntry' at AttributesType.hs:15



However:
(1) this does not seem to happen with ghc-6.2.
(2) why does newFormEntry need Show anyway?  It would only be
relevant in deducing HasConfigRadioButton, but in fact
it has that in the context anyway.


Sorry I didn't report this earlier.

instances2.tar.gz
Description: GNU Zip compressed data

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