%Warning-RISEFALLDLY: t/t_gate_basic.v:25:11: Unsupported: rising/falling/turn-off delays. Using the first delay 25 | nand #(2,3) ND0 (nd0, a[0], b[0], b[1]); | ^ ... For warning description see https://verilator.org/warn/RISEFALLDLY?v=latest ... Use "/* verilator lint_off RISEFALLDLY */" and lint_on around source to disable this message. %Warning-SPECIFYIGN: t/t_gate_basic.v:49:25: Ignoring unsupported: specify block construct 49 | (nt0 *> nt0) = (0, 0); | ^ ... For warning description see https://verilator.org/warn/SPECIFYIGN?v=latest ... Use "/* verilator lint_off SPECIFYIGN */" and lint_on around source to disable this message. %Warning-SPECIFYIGN: t/t_gate_basic.v:59:31: Ignoring unsupported: specify block construct 59 | (A1 *> Q) = (a$A1$Y, a$A1$Y); | ^ %Error: Exiting due to