segfault in udp_socket::set_proxy_settings()

[GoogleCodeExporter]

Backtrace:
 /usr/lib/libtorrent-rasterbar.so.6 : boost::asio::basic_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> >::close(boost::system::error_code&)+0x1f  [0xb750d54f]
 /usr/lib/libtorrent-rasterbar.so.6 : libtorrent::udp_socket::set_proxy_settings(libtorrent::proxy_settings const&)+0x6c  [0xb763a7bc]
 /usr/lib/libtorrent-rasterbar.so.6 : libtorrent::udp_socket::hung_up(boost::system::error_code const&)+0x8f  [0xb763d5cf]
 /usr/lib/libtorrent-rasterbar.so.6 : boost::asio::detail::handler_queue::handler_wrapper<boost::asio::detail::binder2<boost::asio::detail::read_handler<boost::asio::basic_stream_socket<boost::asio::ip::tcp, boost::asio::stream_socket_service<boost::asio::ip::tcp> >, boost::asio::mutable_buffers_1, boost::asio::detail::transfer_all_t, boost::_bi::bind_t<void, boost::_mfi::mf1<void, libtorrent::udp_socket, boost::system::error_code const&>, boost::_bi::list2<boost::_bi::value<libtorrent::udp_socket*>, boost::arg<1> > > >, boost::system::error_code, unsigned int> >::do_call(boost::asio::detail::handler_queue::handler*)+0x4a7  [0xb764a197]
 /usr/lib/libtorrent-rasterbar.so.6 : boost::asio::detail::task_io_service<boost::asio::detail::epoll_reactor<false> >::run(boost::system::error_code&)+0x301  [0xb7520001]
 /usr/lib/libtorrent-rasterbar.so.6 : libtorrent::aux::session_impl::operator()()+0x5c  [0xb75a948c]
 /usr/lib/libtorrent-rasterbar.so.6 : boost::detail::thread_data<boost::reference_wrapper<libtorrent::aux::session_impl> >::run()+0x23  [0xb75be323]
 /usr/lib/libboost_thread.so.1.42.0 : thread_proxy()+0x65  [0xb77010f5]
 /lib/libpthread.so.0 : ()+0x5cc9  [0xb73c0cc9]
 /lib/libc.so.6 : clone()+0x5e  [0xb62b869e]

What is the expected output? What do you see instead?

What version of the product are you using? On what operating system?
v0.15.4 on Ubuntu Linux

Please provide any additional information below.
Original report: http://bugs.launchpad.net/bugs/697417

Original issue reported on code.google.com by dch...@gmail.com on 6 Jan 2011 at 6:23

[GoogleCodeExporter]

do you have a core file?

Original comment by arvid.no...@gmail.com on 6 Jan 2011 at 6:44

[GoogleCodeExporter]

Check this thread out too:
http://dev.deluge-torrent.org/ticket/1509

I'm using BTguard and the bug causes the segmentation fault randomly.  

Original comment by will.e.c...@gmail.com on 12 May 2011 at 1:55