%Error-UNSUPPORTED: t/t_implements_noninterface_bad.v:13:11: Unsupported: interface classes
   13 | interface class Icls;
      |           ^~~~~
                    ... For error description see https://verilator.org/warn/UNSUPPORTED?v=latest
%Error: t/t_implements_noninterface_bad.v:10:26: Attempting to implement from non-interface class 'NotIcls'
... Suggest use 'extends'
   10 | class ClsBad1 implements NotIcls;
      |                          ^~~~~~~
%Error: t/t_implements_noninterface_bad.v:16:23: Attempting to extend from interface class 'Icls'
... Suggest use 'implements'
   16 | class ClsBad2 extends Icls;
      |                       ^~~~
%Error: Exiting due to