%Error: t/t_implements_contents_bad.v:8:8: Interface class cannot contain non-parameter members (IEEE 1800-2017 8.26): 'badi'
    8 |    int badi;
      |        ^~~~
%Error: t/t_implements_contents_bad.v:9:9: Interface class functions must be pure virtual (IEEE 1800-2017 8.26): 'badtask'
    9 |    task badtask;
      |         ^~~~~~~
%Error: Exiting due to
