4 Apr
2011
4 Apr
'11
1:18 p.m.
System.Event.Manager [1] contains the following type alias and Show instance: -- | Callback invoked on I/O events. type IOCallback = FdKey -> Event -> IO () instance Show IOCallback where show _ = "IOCallback" This specialized instance conflicts with the more general instance Show (a -> b) defined in Text.Show.Functions. Stefan found this conflict when trying to compile the checkers package on ghc 7.0.3. I suspect it will arise with other packages as well. My suggestion is to remove the specialized Show instance and instead import Text.Show.Functions as needed. Other thoughts? [1] http://hackage.haskell.org/packages/archive/base/4.3.1.0/doc/html/src/System... - Conal