-alt/error_class_generic_alt2.nit:18,22--26: Warning: Useless formal parameter type since `Float` cannnot have subclasses.
-alt/error_class_generic_alt2.nit:25,8--12: Type error: 'Array' is a generic class.
+alt/error_class_generic_alt2.nit:25,8--12: Type Error: `Array[E: nullable Object]` is a generic class.