[Libevent-users] help with debugging

[Mihai Draghicioiu <mihai.draghicioiu@xxxxxxxxx>]

Hi, i've received a http/dns related crash inside libevent code, and
i'm not sure if it's a libevent bug or my application's bug.

I'm using 2.0.7-rc on linux.

The code that uses the http code is here
http://github.com/vampirefrog/frogmod-justice/blob/master/fpsgame/server.cpp#L746
Lines 746-790.
It tries to do a simple POST request to a pre-configured URL.

The backtrace:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb74af6c0 (LWP 8189)]
evhttp_request_get_input_buffer (req=0x8a57dd0) at http.c:3014
3014    {
Current language:  auto; currently c
(gdb) backtrace
#0  evhttp_request_get_input_buffer (req=0x8a57dd0) at http.c:3014
#1  0x080919fe in _bufferevent_run_eventcb (bufev=0x20, what=0) at
bufferevent.c:264
#2  0x080928bd in bufferevent_connect_getaddrinfo_cb (result=-4,
ai=0x8a47d50, arg=0x8a57dd0) at bufferevent_sock.c:444
#3  0x0809fa39 in evdns_getaddrinfo_timeout_cb (fd=-1, what=1,
ptr=0x8a58100) at evdns.c:4112
#4  0x0808a5aa in event_base_loop (base=0x8607660, flags=<value
optimized out>) at event.c:1288
#5  0x0808b1b9 in event_base_dispatch (event_base=0x8607660) at event.c:1382
#6  0x08061439 in rundedicatedserver () at
/home/mihai/frogmod-justice/engine/server.cpp:828
#7  0x08062c10 in initserver (listen=true, dedicated=true) at
/home/mihai/frogmod-justice/engine/server.cpp:1010
#8  0x08062d08 in main (argc=1, argv=0xbfdac3a4) at
/home/mihai/frogmod-justice/engine/server.cpp:107

I've stopped gdb without saving a core dump, but this crash has
happened before and it will happen again. It seems to be related to
dns timeout. If i add the http host in /etc/hosts, this crash doesn't
happen anymore.
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