valgrind find memory leak after call evtimer_del from libevent

Question

I just create a new event with event_new(),
and finally del it with evtimer_del().
Then valgrind warning me there is memory leak(128 bytes in 1 blocks).
What do I missed?

The code:

evthread_use_pthreads();
auto _base = event_base_new();
event_init();
event* _timer = event_new(_base, -1, EV_TIMEOUT, NULL, NULL);
evtimer_del(_timer);
event_base_free(_base);

Answer 1

You are using wrong deallocation function, from docs:

event_new()
Returns
a newly allocated struct event that must later be freed with event_free().

While evtimer_del is an alias for event_del() which only unlists event.