[Libevent-users] Paired bufferevents can't let event_base_dispatch block?

[wwyyxx26 <wwyyxx26@xxxxxxx>]

I want use paired bufferevents to pass message to the thread whitch called event_base_dispatch.

...

struct bufferevent *pairbev[2];

bufferevent_pair_new(ebase, BEV_OPT_THREADSAFE, pairbev);

...

bufferevent_setcb(pairbev[1], Static_ReadCallback, NULL, Static_EventCallback, this);

bufferevent_enable(pairbev[1], EV_READ|EV_WRITE);

...

but I found that when the event_base has only pairbev[1] event on it, it can't let the event_base_dispatch block, this function return with value 1 Immediately.

I had tried both in linux and windows, it looks like the same. 

Does it a bug or was there something i Ignored?