%Warning-BLKSEQ: t/t_lint_blksync_bad.v:23: Blocking assignments (=) in sequential (flop or latch) block
                                          : ... Suggest delayed assignments (<=)
      sync_blk = 1'b1;
               ^
                 ... Use "/* verilator lint_off BLKSEQ */" and lint_on around source to disable this message.
%Warning-COMBDLY: t/t_lint_blksync_bad.v:30: Delayed assignments (<=) in non-clocked (non flop or latch) block
                                           : ... Suggest blocking assignments (=)
      combo_nblk <= 1'b1;
                 ^~
                  *** See the manual before disabling this,
                  else you may end up with different sim results.
%Error: Exiting due to