%Warning-IMPLICIT: t/t_lint_lint_bad.v:9:7: Signal definition not found, creating implicitly: 'implicit_out'
    9 |   not(implicit_out, i);
      |       ^~~~~~~~~~~~
                   ... For warning description see https://verilator.org/warn/IMPLICIT?v=latest
                   ... Use "/* verilator lint_off IMPLICIT */" and lint_on around source to disable this message.
%Error: Exiting due to