alt/error_type_unk_alt5.nit:15,9--12: Error: class `Fail` not found in module `error_type_unk_alt5`.
alt/error_type_unk_alt5.nit:16,11--14: Error: class `Fail` not found in module `error_type_unk_alt5`.
alt/error_type_unk_alt5.nit:33,15--18: Error: class `Fail` not found in module `error_type_unk_alt5`.
alt/error_type_unk_alt5.nit:34,17--20: Error: class `Fail` not found in module `error_type_unk_alt5`.