%Error: t/t_bitsel_wire_array_bad.v:16:16: Illegal assignment of constant to unpacked array
                                         : ... note: In instance 't'
   16 |    assign b = a[0];   
      |                ^
        ... See the manual at https://verilator.org/verilator_doc.html?v=latest for more assistance.
%Error: Exiting due to