1/1: Building LamParseError (LamParseError.idr)
Error: Expected '=>'.

LamParseError:2:24--2:26
 1 | fun : a -> b -> c -> d -> a
 2 | fun = \ a, b => \ c, d -> a
                            ^^

1/1: Building CaseParseError (CaseParseError.idr)
Error: Expected '=>' or 'impossible'.

CaseParseError:4:7--4:9
 1 | plus : Nat -> Nat -> Nat
 2 | plus m n = case m of
 3 |   Z => n
 4 |   S m -> S (plus m n)
           ^^