bug in instance Read Int

The Haskell'98 Report specifies that 'read'ing an Int should accept
only decimal notation

    instance Read Int where
        readsPrec p = readSigned readDec

(or near equivalent), yet ghc seems to read hexadecimal Ints.

    Prelude> show (Char.chr (read "0x2B" :: Int))
    "'+'"
    Prelude>

Ghc's behaviour seems entirely reasonable, but it does not conform
to the Report.  Should we regard this as a bug in the definition
therefore?  Is there an on-going errata list for the final Revised
Report?

Regards,
    Malcolm