%Error-UNSUPPORTED: t/t_interface_virtual_unsup.v:22:22: Unsupported: Write to virtual interface in if condition
   22 |       if (write_data(vif.data)) $write("dummy op");
      |                      ^~~
                    ... For error description see https://verilator.org/warn/UNSUPPORTED?v=latest
%Error-UNSUPPORTED: t/t_interface_virtual_unsup.v:23:25: Unsupported: Write to virtual interface in loop condition
   23 |       while (write_data(vif.data));
      |                         ^~~
%Error-UNSUPPORTED: t/t_interface_virtual_unsup.v:24:30: Unsupported: Write to virtual interface in loop condition
   24 |       do ; while (write_data(vif.data));
      |                              ^~~
%Error: Exiting due to