fix timeout event duplicate

event.go

@@ -301,17 +301,16 @@ func (bs *EventBase) handleActiveEvents() {
 			ev := e.value.(*Event)
 			if ev.events&EvPersist != 0 {
 				bs.eventQueueRemove(ev, evListActive)
-				bs.eventQueueRemove(ev, evListTimeout)
+				if ev.events&EvTimeout != 0 {
+					bs.eventQueueRemove(ev, evListTimeout)
+					ev.deadline = bs.now().Add(ev.timeout)
+					bs.eventQueueInsert(ev, evListTimeout)
+				}
 			} else {
 				bs.delEvent(ev)
 			}
 			e = next
 
-			if ev.events&EvTimeout != 0 && ev.events&EvPersist != 0 {
-				ev.deadline = bs.now().Add(ev.timeout)
-				bs.eventQueueInsert(ev, evListTimeout)
-			}
-
 			ev.cb(ev.fd, ev.res, ev.arg)
 		}
 	}

kqueue.go

@@ -90,11 +90,11 @@ func (kq *poller) polling(cb func(ev *Event, res uint32), timeout time.Duration)
 	for i := 0; i < n; i++ {
 		flags := kq.events[i].Flags
 		if flags&syscall.EV_ERROR != 0 {
-			data := syscall.Errno(kq.events[i].Data)
-			if data&(syscall.EBADF|syscall.ENOENT|syscall.EINVAL) != 0 {
+			errno := syscall.Errno(kq.events[i].Data)
+			if errno&(syscall.EBADF|syscall.ENOENT|syscall.EINVAL) != 0 {
 				continue
 			}
-			return data
+			return errno
 		}
 
 		which := uint32(0)