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<interactive>:2:10: warning:
Found hole: _ :: IO ()
In the second argument of ‘(<$>)’, namely ‘_’
In the first argument of ‘ghciStepIO :: IO a -> IO a’, namely
‘Just <$> _’
In a stmt of an interactive GHCi command:
it <- ghciStepIO :: IO a -> IO a (Just <$> _)
*** Exception: <interactive>:2:10: error:
Found hole: _ :: IO ()
In the second argument of ‘(<$>)’, namely ‘_’
In the first argument of ‘ghciStepIO :: IO a -> IO a’, namely
‘Just <$> _’
In a stmt of an interactive GHCi command:
it <- ghciStepIO :: IO a -> IO a (Just <$> _)
(deferred type error)
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