+base_as_notnull.nit:41,6: Warning: expression is not null, since it is a `A`.
+base_as_notnull.nit:42,6--7: Warning: expression is not null, since it is a `A`.
+base_as_notnull.nit:43,6: Warning: expression is not null, since it is a `B`.
+base_as_notnull.nit:52,6: Warning: expression is not null, since it is a `B`.
1
2
3