reg054.idr:18:5:When checking left hand side of inf: When checking an application of constructor Main.MkInfer: Attempting concrete match on polymorphic argument: 0 reg054.idr:34:7:When checking left hand side of weird: No explicit types on left hand side: Char reg054.idr:37:8:When checking left hand side of weird': No explicit types on left hand side: Nat reg054.idr:40:1-8:When checking left hand side of tctrick: When checking an application of Main.tctrick: Type mismatch between Maybe a1 (Type of Just x) and a (Expected type)