+alt/base_as_notnull_alt6.nit:41,6: Warning: expression is not null, since it is a `A`.
+alt/base_as_notnull_alt6.nit:42,6--7: Warning: expression is not null, since it is a `A`.
+alt/base_as_notnull_alt6.nit:43,6: Warning: expression is not null, since it is a `B`.
+alt/base_as_notnull_alt6.nit:52,6: Warning: expression is not null, since it is a `B`.
+Runtime error: Cast failed (alt/base_as_notnull_alt6.nit:60)
1
2
3
3
6
-Runtime error: Cast failed (alt/base_as_notnull_alt6.nit:60)