Remove Show instance for GHC.Event.IOCallback
Conal reported that the Show instance for IOCallback conflicts with the more general instance Show (a -> b) defined in Text.Show.Functions.
The attached patch removes the Show instance for IOCallback like Bryan propsed. It also removes the Show instance for FdData since that type contains an IOCallback. I don't think this matters because FdData is an internal type.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.0.3 |
| Type | FeatureRequest |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | libraries/base |
| Test case | |
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