Error found:
in module Main
at tests/purs/failing/CoercibleRepresentational2.purs:9:14 - 9:20 (line 9, column 14 - line 9, column 20)

  No type class instance was found for
                                
    Prim.Coerce.Coercible Int   
                          String
                                

while solving type class constraint
                                     
  Prim.Coerce.Coercible (Arr1 Int)   
                        (Arr1 String)
                                     
while checking that type forall (a :: Type) (b :: Type). Coercible @Type a b => a -> b
  is at least as general as type Arr1 Int -> Arr1 String
while checking that expression coerce
  has type Arr1 Int -> Arr1 String
in value declaration arr1ToArr1

See https://github.com/purescript/documentation/blob/master/errors/NoInstanceFound.md for more information,
or to contribute content related to this error.