alt/error_type_not_ok5_alt1.nit:23,8--11: Type error: 'Fail' is a generic class.
alt/error_type_not_ok5_alt1.nit:25,9--21: Type error: 'Fail' is a generic class.
alt/error_type_not_ok5_alt1.nit:28,14--17: Type error: 'Fail' is a generic class.
alt/error_type_not_ok5_alt1.nit:29,11--14: Type error: 'Fail' is a generic class.
alt/error_type_not_ok5_alt1.nit:30,11--14: Type error: 'Fail' is a generic class.
alt/error_type_not_ok5_alt1.nit:31,13--16: Type error: 'Fail' is a generic class.