%Warning-IMPLICIT: t/t_lint_implicit.v:10: Signal definition not found, creating implicitly: b
                   ... Use "/* verilator lint_off IMPLICIT */" and lint_on around source to disable this message.
%Warning-IMPLICIT: t/t_lint_implicit.v:12: Signal definition not found, creating implicitly: nt0
%Warning-IMPLICIT: t/t_lint_implicit.v:15: Signal definition not found, creating implicitly: dummy1
%Warning-IMPLICIT: t/t_lint_implicit.v:15: Signal definition not found, creating implicitly: dummy2
%Error: Exiting due to