%Warning-PINMISSING: t/t_lint_pinmissing_bad.v:8:8: Cell has missing pin: 'port'
    8 |    sub sub();   
      |        ^~~
                     t/t_lint_pinmissing_bad.v:11:11: ... Location of port declaration
   11 |   (output port);
      |           ^~~~
                     ... For warning description see https://verilator.org/warn/PINMISSING?v=latest
                     ... Use "/* verilator lint_off PINMISSING */" and lint_on around source to disable this message.
%Error: Exiting due to