%Warning-WIDTHCONCAT: t/t_param_concat.v:19:15: Unsized numbers/parameters not allowed in concatenations.
                                              : ... In instance t
   19 |          if ({UNSIZED,UNSIZED+1} != {32'd10, 32'd11}) $stop;
      |               ^~~~~~~
                      ... For warning description see https://verilator.org/warn/WIDTHCONCAT?v=latest
                      ... Use "/* verilator lint_off WIDTHCONCAT */" and lint_on around source to disable this message.
%Warning-WIDTHCONCAT: t/t_param_concat.v:19:22: Unsized numbers/parameters not allowed in replications.
                                              : ... In instance t
   19 |          if ({UNSIZED,UNSIZED+1} != {32'd10, 32'd11}) $stop;
      |                      ^
%Warning-WIDTHCONCAT: t/t_param_concat.v:20:17: Unsized numbers/parameters not allowed in replications.
                                              : ... In instance t
   20 |          if ({2{UNSIZED}} != {32'd10, 32'd10}) $stop;
      |                 ^~~~~~~
%Error: Exiting due to