precedence bug with derived instances

Dean Herington heringto at cs.unc.edu
Thu Oct 17 13:23:48 EDT 2002

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In GHC 5.04.1, derived instances of Show mishandle precedence:

Prelude> putStrLn (showsPrec 10 (Just 0) "")
Just 0
Prelude>

The result should be:

(Just 0)

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