%Error-UNSUPPORTED: t/t_interface_ar3.v:18:18: Unsupported: interface slices
                                             : ... note: In instance 't'
   18 |       .infc(iinst[0:1])
      |                  ^
                    ... For error description see https://verilator.org/warn/UNSUPPORTED?v=latest
%Error: Internal Error: t/t_interface_ar3.v:18:18: ../V3Inst.cpp:#: No interface varref under array
                                                 : ... note: In instance 't'
   18 |       .infc(iinst[0:1])
      |                  ^
                        ... This fatal error may be caused by the earlier error(s); resolve those first.