Re: [Libevent-users] Re: libevent-2.0.8-rc/evdns.c:2672: Assertion (req)->handle && (req)->handle->current_req == (req) failed in evdns_cancel_request

[Denis Bilenko <denis.bilenko@xxxxxxxxx>]

On Tue, Nov 16, 2010 at 6:54 PM, Nick Mathewson <nickm@xxxxxxxxxxxxx> wrote:
>> Thanks!  I'm trying to reproduce this so I can see whether my fix
>> ideas work, but I'm not having a lot of luck.  Any chance of a quick
>> test program so I can reproduce this crash?
>
> There's a possible fix in my github repository
> (git://github.com/nmathewson/Libevent.git) in branch
> "20_getaddrinfo_cancel".  Please let me know whether it works, so I
> know whether to merge it?


my getaddrinfo test still crashes:

#0  0x0000000000000000 in ?? ()
No symbol table info available.
#1  0x00007f69dcd8de5a in evdns_getaddrinfo_gotresolve (result=66,
type=0 '\000', count=<value optimized out>, ttl=0, addresses=0x0,
arg=0x22886e0)
    at /home/denis/src/Libevent/evdns.c:4202
        i = <value optimized out>
        other_req = 0x22886d0
        data = 0x2288680
        res = <value optimized out>
        sin = {sin_family = 41440, sin_port = 549, sin_addr = {s_addr
= 0}, sin_zero = "\000\000\000\000\000\000\000"}
        sin6 = {sin6_family = 20512, sin6_port = 33125, sin6_flowinfo
= 32767, sin6_addr = {__in6_u = {
              __u6_addr8 =
"R\370\177\201\377\177\000\000\001\000\000\000\000\000\000",
__u6_addr16 = {63570, 33151, 32767, 0, 1, 0, 0, 0},
              __u6_addr32 = {2172647506, 32767, 1, 0}}}, sin6_scope_id
= 3716292160}
        sa = <value optimized out>
        socklen = 32617
        addrlen = <value optimized out>
        addrp = 0x4c48fb
        err = <value optimized out>
        __func__ = "evdns_getaddrinfo_gotresolve"
#2  0x00007f69dcd899bc in reply_run_callback (d=0x229e6a0,
user_pointer=<value optimized out>) at
/home/denis/src/Libevent/evdns.c:780
        __func__ = "reply_run_callback"
#3  0x00007f69dcd75611 in event_process_deferred_callbacks
(base=0x225a1e0, flags=<value optimized out>) at
/home/denis/src/Libevent/event.c:1326
        count = 1
        cb = 0x229e6a0
#4  event_process_active (base=0x225a1e0, flags=<value optimized out>)
at /home/denis/src/Libevent/event.c:1365
        i = 0
        c = 2
#5  event_base_loop (base=0x225a1e0, flags=<value optimized out>) at
/home/denis/src/Libevent/event.c:1550
        evsel = 0x7f69dcfa2ca0
        tv = {tv_sec = 0, tv_usec = 0}
        tv_p = <value optimized out>
        res = <value optimized out>
        retval = <value optimized out>
        __func__ = "event_base_loop"
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