%Error-UNSUPPORTED: t/t_class_extends.v:13:21: Unsupported: class extends
   13 | class Base1 extends Base0;
      |                     ^~~~~
%Error: t/t_class_extends.v:13:21: Found definition of 'Base0' as a CLASS but expected a variable
   13 | class Base1 extends Base0;
      |                     ^~~~~
%Error-UNSUPPORTED: t/t_class_extends.v:17:21: Unsupported: class extends
   17 | class Base2 extends Base1;
      |                     ^~~~~
%Error: t/t_class_extends.v:17:21: Found definition of 'Base1' as a CLASS but expected a variable
   17 | class Base2 extends Base1;
      |                     ^~~~~
%Error-UNSUPPORTED: t/t_class_extends.v:21:19: Unsupported: class extends
   21 | class Cls extends Base2;
      |                   ^~~~~
%Error: t/t_class_extends.v:21:19: Found definition of 'Base2' as a CLASS but expected a variable
   21 | class Cls extends Base2;
      |                   ^~~~~
%Error: Exiting due to