1%Warning-CASEWITHX: t/t_case_zx_bad.v:16:9: Use of x constant in casez statement, (perhaps intended ?/z in constant) 2 16 | 4'b1xxx: $stop; 3 | ^~~~~~~ 4 ... For warning description see https://verilator.org/warn/CASEWITHX?v=latest 5 ... Use "/* verilator lint_off CASEWITHX */" and lint_on around source to disable this message. 6%Error: Exiting due to 7