%Warning-IMPORTSTAR: t/t_lint_importstar_bad.v:11:12: Import::* in $unit scope may pollute global namespace 11 | import defs::*; | ^~ ... For warning description see https://verilator.org/warn/IMPORTSTAR?v=latest ... Use "/* verilator lint_off IMPORTSTAR */" and lint_on around source to disable this message. %Error: Exiting due to