%Error-NEEDTIMINGOPT: t/t_notiming.v:12:8: Use --timing or --no-timing to specify how delays should be handled
                                         : ... note: In instance 't'
   12 |        #1
      |        ^
                      ... For error description see https://verilator.org/warn/NEEDTIMINGOPT?v=latest
%Error-NEEDTIMINGOPT: t/t_notiming.v:13:8: Use --timing or --no-timing to specify how forks should be handled
                                         : ... note: In instance 't'
   13 |        fork @e; @e; join;
      |        ^~~~
%Error-NEEDTIMINGOPT: t/t_notiming.v:14:8: Use --timing or --no-timing to specify how event controls should be handled
                                         : ... note: In instance 't'
   14 |        @e
      |        ^
%Error-NEEDTIMINGOPT: t/t_notiming.v:15:8: Use --timing or --no-timing to specify how wait statements should be handled
                                         : ... note: In instance 't'
   15 |        wait(x == 4)
      |        ^~~~
%Error-NEEDTIMINGOPT: t/t_notiming.v:16:12: Use --timing or --no-timing to specify how timing controls should be handled
                                          : ... note: In instance 't'
   16 |        x = #1 8;
      |            ^
%Error-NEEDTIMINGOPT: t/t_notiming.v:19:8: Use --timing or --no-timing to specify how event controls should be handled
                                         : ... note: In instance 't'
   19 |        @e
      |        ^
%Error-NEEDTIMINGOPT: t/t_notiming.v:26:12: Use --timing or --no-timing to specify how delays should be handled
                                          : ... note: In instance 't'
   26 |    initial #1 ->e;
      |            ^
%Error-NEEDTIMINGOPT: t/t_notiming.v:27:12: Use --timing or --no-timing to specify how delays should be handled
                                          : ... note: In instance 't'
   27 |    initial #2 $stop;  
      |            ^
%Error-NEEDTIMINGOPT: t/t_notiming.v:33:10: Use --timing or --no-timing to specify how mailbox::put() should be handled
                                          : ... note: In instance 't'
   33 |        m.put(i);
      |          ^~~
%Error-NEEDTIMINGOPT: t/t_notiming.v:34:10: Use --timing or --no-timing to specify how mailbox::get() should be handled
                                          : ... note: In instance 't'
   34 |        m.get(i);
      |          ^~~
%Error-NEEDTIMINGOPT: t/t_notiming.v:35:10: Use --timing or --no-timing to specify how mailbox::peek() should be handled
                                          : ... note: In instance 't'
   35 |        m.peek(i);
      |          ^~~~
%Error-NEEDTIMINGOPT: t/t_notiming.v:36:10: Use --timing or --no-timing to specify how semaphore::get() should be handled
                                          : ... note: In instance 't'
   36 |        s.get();
      |          ^~~
%Error: Exiting due to