alt/base_as_notnull_alt7.nit:41,6: Warning: 'as(not null)' on non nullable type.
alt/base_as_notnull_alt7.nit:42,6--7: Warning: 'as(not null)' on non nullable type.
alt/base_as_notnull_alt7.nit:43,6: Warning: 'as(not null)' on non nullable type.
alt/base_as_notnull_alt7.nit:52,6: Warning: 'as(not null)' on non nullable type.
alt/base_as_notnull_alt7.nit:61,1--4: Type error: 'as(not null)' on 'null' value.