[ ghc-Bugs-419151 ] Imp. Params not subject to defaulting

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Bugs item #419151, was updated on 2001-04-26 08:05
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Category: Compiler (Type checker)
Group: 5.00
Status: Open
Resolution: None
Priority: 5
Submitted By: Jeffrey R. Lewis (lewie)
Assigned to: Nobody/Anonymous (nobody)
Summary: Imp. Params not subject to defaulting

Initial Comment:
main = putStr $ show $ foo () with ?x = 13

foo () = ?x

Yields:

    Ambiguous type variable(s) `a' in the constraint
`Show a'
    arising from use of `show' at t2.hs:3
    In the first argument of `($)', namely `show'
    In the second argument of `($)', namely `show $
(foo ())'

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http://sourceforge.net/tracker/?func=detail&atid=108032&aid=419151&group_id=8032