(gdb) bt 100
#0  0x00007ffff7a4acc9 in __GI_raise (sig=sig@entry=6)
    at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1  0x00007ffff7a4e0d8 in __GI_abort () at abort.c:89
#2  0x00007ffff7a87f24 in __libc_message (do_abort=do_abort@entry=1,
    fmt=fmt@entry=0x7ffff7b966c8 "*** Error in `%s': %s: 0x%s ***\n")
    at ../sysdeps/posix/libc_fatal.c:175
#3  0x00007ffff7a941fe in malloc_printerr (ptr=<optimized out>,
    str=0x7ffff7b927b9 "free(): invalid pointer", action=1) at malloc.c:4996
#4  _int_free (av=<optimized out>, p=<optimized out>, have_lock=0)
    at malloc.c:3840
#5  0x0000000000521c80 in cryptonote::t_cryptonote_protocol_handler<cryptonote::core>::handle_request_chain(int, cryptonote::NOTIFY_REQUEST_CHAIN::request&, cryptonote::cryptonote_connection_context&) ()
#6  0x0000000000511945 in int nodetool::node_server<cryptonote::t_cryptonote_protocol_handler<cryptonote::core> >::handle_invoke_map<nodetool::p2p_connection_context_t<cryptonote::cryptonote_connection_context> >(bool, int, std::string const&, std::string&, nodetool::p2p_connection_context_t<cryptonote::cryptonote_connection_context>&, bool&) ()
#7  0x00000000004d1bd3 in epee::levin::async_protocol_handler<nodetool::p2p_connection_context_t<cryptonote::cryptonote_connection_context> >::handle_recv(void const*, unsigned long) ()
#8  0x00000000004d8929 in epee::net_utils::connection<epee::levin::async_protocol_handler<nodetool::p2p_connection_context_t<cryptonote::cryptonote_connection_context> > >::handle_read(boost::system::error_code const&, unsigned long) ()
#9  0x00000000004c5c22 in boost::asio::detail::completion_handler<boost::asio::detail::rewrapped_handler<boost::asio::detail::binder2<boost::asio::detail::wrapped_handler<boost::asio::io_service::strand, boost::_bi::bind_t<void, boost::_mfi::mf2<void, epee::net_utils::connection<epee::levin::async_protocol_handler<nodetool::p2p_connection_context_t<cryptonote::cryptonote_connection_context> > >, boost::system::error_code const&, unsigned long>, boost::_bi::list3<boost::_bi::value<boost::shared_ptr<epee::net_utils::connection<epee::levin::async_protocol_handler<nodetool::p2p_connection_context_t<cryptonote::cryptonote_connection_context> > > > >, boost::arg<1> (*)(), boost::arg<2> (*)()> >, boost::asio::detail::is_continuation_if_running>, boost::system::error_code, unsigned long>, boost::_bi::bind_t<void, boost::_mfi::mf2<void, epee::net_utils::connection<epee::levin::async_protocol_handler<nodetool::p2p_connection_context_t<cryptonote::cryptonote_connection_context> > >, boost::system::error_code const&, unsigned long>, boost::_bi::list3<boost::_bi::value<boost::shared_ptr<epee::net_utils::connection<epee::levin::async_protocol_handler<nodetool::p2p_connection_context_t<cryptonote::cryptonote_connection_context> > > > >, boost::arg<1> (*)(), boost::arg<2> (*)()> > > >::do_complete(boost::asio::detail::task_io_service*, boost::asio::detail::task_io_service_operation*, boost::system::error_code const&, unsigned long)
    ()
#10 0x0000000000533d19 in boost::asio::detail::reactive_socket_recv_op<boost::asio::mutable_buffers_1, boost::asio::detail::wrapped_handler<boost::asio::io_service::strand, boost::_bi::bind_t<void, boost::_mfi::mf2<void, epee::net_utils::connection<epee::levin::async_protocol_handler<nodetool::p2p_connection_context_t<cryptonote::cryptonote_connection_context> > >, boost::system::error_code const&, unsigned long>, boost::_bi::list3<boost::_bi::value<boost::shared_ptr<epee::net_utils::connection<epee::levin::async_protocol_handler<nodetool::p2p_connection_context_t<cryptonote::cryptonote_connection_context> > > > >, boost::arg<1> (*)(), boost::arg<2> (*)()> >, boost::asio::detail::is_continuation_if_running> >::do_complete(boost::asio::detail::task_io_service*, boost::asio::detail::task_io_service_operation*, boost::system::error_code const&, unsigned long) ()
#11 0x00000000004873f5 in boost::asio::detail::epoll_reactor::descriptor_state::do_complete(boost::asio::detail::task_io_service*, boost::asio::detail::task_io_service_operation*, boost::system::error_code const&, unsigned long) ()
#12 0x00000000004acfe8 in epee::net_utils::boosted_tcp_server<epee::levin::async_protocol_handler<nodetool::p2p_connection_context_t<cryptonote::cryptonote_connection_context> > >::worker_thread() ()
#13 0x00007ffff6c71e7a in ?? ()
   from /usr/lib/x86_64-linux-gnu/libboost_thread.so.1.55.0
#14 0x00007ffff6a50182 in start_thread (arg=0x7fffe9bf9700)
    at pthread_create.c:312
#15 0x00007ffff7b0f00d in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111