%Warning-COLONPLUS: t/t_lint_colonplus_bad.v:13:25: Perhaps instead of ':+' the intent was '+:'?
   13 |    output [2:1] z = r[2 :+ 1];
      |                         ^~
                    ... Use "/* verilator lint_off COLONPLUS */" and lint_on around source to disable this message.
%Error: Exiting due to
