%Warning-DEFPARAM: t/t_lint_defparam.v:10:19: Suggest replace defparam assignment with Verilog 2001 #(.P(...etc...))
   10 |    defparam sub.P = 2;
      |                   ^
                   ... Use "/* verilator lint_off DEFPARAM */" and lint_on around source to disable this message.
%Error: Exiting due to