Regular rtorrent crashes because of DHT

[espressoelf]

After many crashes, I found another issue where gdb was mentioned and did the same to provide a better stack trace:

0x00007ffff7e3b4e8 in torrent::DhtServer::find_node_next (this=0x6b8ad0,
    transaction=0x3b54960) at dht_transaction.h:341
341     dht_transaction.h: No such file or directory.
Missing separate debuginfos, use: [...]
(gdb) bt
#0  0x00007ffff7e3b4e8 in torrent::DhtServer::find_node_next (this=0x6b8ad0,
    transaction=0x3b54960) at dht_transaction.h:341
#1  0x00007ffff7e3bcb6 in torrent::DhtServer::parse_find_node_reply (
    this=0x6b8ad0, transaction=0x3b54960, nodes=...) at dht_server.cc:466
#2  0x00007ffff7e3be85 in torrent::DhtServer::process_response (this=0x6b8ad0,
    id=..., sa=0x7fffffffd440, response=...) at dht_transaction.h:446
#3  0x00007ffff7e3c008 in torrent::DhtServer::event_read (this=0x6b8ad0)
    at dht_server.cc:793
#4  0x00007ffff7deb38a in torrent::PollEPoll::perform (
    this=this@entry=0x62a690) at poll_epoll.cc:185
#5  0x00007ffff7deb485 in torrent::PollEPoll::do_poll (this=0x62a690,
    timeout_usec=<optimized out>, flags=<optimized out>) at poll_epoll.cc:224
#6  0x00007ffff7e1efa3 in torrent::thread_base::event_loop (
    thread=<optimized out>) at thread_base.cc:174
#7  0x0000000000435255 in main (argc=1, argv=0x7fffffffe358) at main.cc:490

Disabling DHT fixed the crashes, but I'd like to use it again. I compiled xmlrpc-c (advanced, v1.57.0), libtorrent (v0.13.8) and rtorrent (v0.9.8) like it's described here, except that I had to run export PKG_CONFIG_PATH=/usr/local/lib64/pkgconfig before calling ./configure.

Any guess what could be the problem or a hint what I could do to provide more information?

[slingamn]

I've got that backtrace, plus this one which appears to be a double-free:

(gdb) bt
#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#1  0x00007f4fdb819801 in __GI_abort () at abort.c:79
#2  0x000055ee54a63f78 in do_panic (signum=11) at main.cc:632
#3  <signal handler called>
#4  0x000055ee6e42c910 in ?? ()
#5  0x00007f4fdc42d4ce in torrent::DhtTransactionSearch::~DhtTransactionSearch (this=0x55ee6d29da60, __in_chrg=<optimized out>) at dht_transaction.cc:309
#6  0x00007f4fdc42b243 in torrent::DhtTransactionFindNode::~DhtTransactionFindNode (this=0x55ee6d29da60, __in_chrg=<optimized out>) at dht_transaction.h:367
#7  torrent::DhtTransactionFindNode::~DhtTransactionFindNode (this=0x55ee6d29da60, __in_chrg=<optimized out>) at dht_transaction.h:367
#8  0x00007f4fdc426c58 in torrent::DhtServer::failed_transaction (this=this@entry=0x55ee55cd0e80, itr={first = 194669371216363729, second = 0x55ee6d29da60}, quick=quick@entry=false) at dht_server.cc:684
#9  0x00007f4fdc42722d in torrent::DhtServer::receive_timeout (this=0x55ee55cd0e80) at dht_server.cc:939
#10 0x00007f4fdc3b7811 in std::function<void ()>::operator()() const (this=<optimized out>) at /usr/include/c++/7/bits/std_function.h:706
#11 torrent::thread_main::call_events (this=<optimized out>) at thread_main.cc:82
#12 0x00007f4fdc407e8c in torrent::thread_base::event_loop (thread=0x55ee55c4f740) at thread_base.cc:141
#13 0x000055ee54a62a82 in main (argc=5, argv=0x7ffd79277a28) at main.cc:495

166 has this valgrind output from a couple years ago: https://gist.github.com/slingamn/578793a4b7eeffd0a564daa707a2ac1b

[trancephorm]

Any chance for fixing this? DHT is very very needed thing in rtorrent, it's a shame such a good client crashes. Lot of serious pro seeders rely on it. I even want to pay to whoever fixes and pushes the changes.