
<interactive>:4:1: error:
    • No instance for (Show t) arising from a use of ‘print’
      Cannot resolve unknown runtime type ‘t’
      Use :print or :force to determine these types
      Relevant bindings include it :: t (bound at <interactive>:4:1)
      These potential instances exist:
        instance (Show a, Show b) => Show (Either a b)
          -- Defined in ‘Data.Either’
        instance Show Ordering -- Defined in ‘GHC.Show’
        instance Show Integer -- Defined in ‘GHC.Show’
        ...plus 23 others
        ...plus 42 instances involving out-of-scope types
        (use -fprint-potential-instances to see them all)
    • In a stmt of an interactive GHCi command: print it

<interactive>:6:1: error:
    • No instance for (Show t) arising from a use of ‘print’
      Cannot resolve unknown runtime type ‘t’
      Use :print or :force to determine these types
      Relevant bindings include it :: t (bound at <interactive>:6:1)
      These potential instances exist:
        instance (Show a, Show b) => Show (Either a b)
          -- Defined in ‘Data.Either’
        instance Show Ordering -- Defined in ‘GHC.Show’
        instance Show Integer -- Defined in ‘GHC.Show’
        ...plus 23 others
        ...plus 42 instances involving out-of-scope types
        (use -fprint-potential-instances to see them all)
    • In a stmt of an interactive GHCi command: print it