%Warning-COMBDLY: t/t_lint_latch_bad.v:24:10: Delayed assignments (<=) in non-clocked (non flop or latch) block
                                            : ... Suggest blocking assignments (=)
      bc <= a;   
         ^~
                  ... Use "/* verilator lint_off COMBDLY */" and lint_on around source to disable this message.
                  *** See the manual before disabling this,
                  else you may end up with different sim results.
%Error: Exiting due to