1
-Uninitialized attribute _a2 in base_attr_nullable_alt2::Foo::a2 (alt/base_attr_nullable_alt2.nit:35)
+Uninitialized attribute _a2 (alt/base_attr_nullable_alt2.nit:35)
,---- Stack trace -- - - -
| base_attr_nullable_alt2::Foo::a2 (alt/base_attr_nullable_alt2.nit:35)
| base_attr_nullable_alt2::Foo::run (alt/base_attr_nullable_alt2.nit:36)