GHCi: No instance for (Show (IO ()))

From Wolfgang Thaller:

This behaviour (from today's stable branch) is slightly
confusing:

> Prelude> print id
>
> Top level:
>     No instance for (Show (IO ()))
>       arising from use of `print' at Top level
>     Probable fix: add an instance declaration for
(Show (IO ()))
>     In a 'do' expression: print it
>
> <interactive>:1:0:
>     No instance for (Show (a -> a))
>       arising from use of `print' at <interactive>:1:0-4
>     Probable fix: add an instance declaration for
(Show (a -> a))
>     In the definition of `it': it = print id

The second message makes sense, but the first one
doesn't. Also, what's 
the difference between "Top level" and "<interactive>:1:0"?

Trac metadata

Trac field	Value
Version	6.4
Type	Bug
TypeOfFailure	OtherFailure
Priority	low
Resolution	ResolvedFixed
Component	GHCi
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