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<interactive>:10:1: error:
• No instance for (Show a1) arising from a use of ‘print’
Cannot resolve unknown runtime type ‘a1’
Use :print or :force to determine these types
Relevant bindings include it :: a1 (bound at <interactive>:10:1)
These potential instances exist:
instance Show Ordering -- Defined in ‘GHC.Show’
instance Show TyCon -- Defined in ‘GHC.Show’
instance Show a => Show (List1 a) -- Defined at Test.hs:11:12
...plus N others
...plus N instances involving out-of-scope types
(use -fprint-potential-instances to see them all)
• In a stmt of an interactive GHCi command: print it
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