%Warning-WIDTHCONCAT: t/t_param_concat.v:18: Unsized numbers/parameters not allowed in concatenations.
                      ... Use "/* verilator lint_off WIDTHCONCAT */" and lint_on around source to disable this message.
%Warning-WIDTHCONCAT: t/t_param_concat.v:18: Unsized numbers/parameters not allowed in replications.
%Warning-WIDTHCONCAT: t/t_param_concat.v:19: Unsized numbers/parameters not allowed in replications.
%Error: Exiting due to
