Libtorrent crash in upnp::on_reply or upnp::delete_mapping

[Nick Korotysh]

Arch Linux x64, kernel 2.6.53-ARCH, Qt 4.7.0, qBittorrent 2.4.4

Programm runs only one time after installing. Then that reports:
I'm sorry, I write in English bad, because I'm russian.

Peer ID: -qB2440-
HTTP user agent is qBittorrent v2.4.4

*************************************************************
Catching SIGSEGV, please report a bug at http://bug.qbittorrent.org
and provide the following backtrace:
stack trace:
  /lib/libc.so.6 : ()+0x32610 [0x7f2d3aa13610]
  /lib/libc.so.6 : cfree()+0x19 [0x7f2d3aa57429]
  /usr/lib/libtorrent-rasterbar.so.6 : libtorrent::upnp::on_reply(boost::asio::ip::basic_endpoint<boost::asio::ip::udp> const&, char*, unsigned long)+0x86b [0x7f2d3d245d2b]
  /usr/lib/libtorrent-rasterbar.so.6 : libtorrent::broadcast_socket::on_receive(libtorrent::broadcast_socket::socket_entry*, boost::system::error_code const&, unsigned long)+0x7b [0x7f2d3d0f0ecb]
  /usr/lib/libtorrent-rasterbar.so.6 : boost::asio::detail::reactive_socket_service<boost::asio::ip::udp>::receive_from_op<boost::asio::mutable_buffers_1, boost::_bi::bind_t<void, boost::_mfi::mf3<void, libtorrent::broadcast_socket, libtorrent::broadcast_socket::socket_entry*, boost::system::error_code const&, unsigned long>, boost::_bi::list4<boost::_bi::value<libtorrent::broadcast_socket*>, boost::_bi::value<libtorrent::broadcast_socket::socket_entry*>, boost::arg<1>, boost::arg<2> > > >::do_complete(boost::asio::detail::task_io_service<boost::asio::detail::epoll_reactor>*, boost::asio::detail::task_io_service_operation<boost::asio::detail::epoll_reactor>*, boost::system::error_code, unsigned long)+0xdf [0x7f2d3d0f2d9f]
  /usr/lib/libtorrent-rasterbar.so.6 : libtorrent::aux::session_impl::operator()()+0x54a [0x7f2d3d1be51a]
  /usr/lib/libboost_thread-mt.so.1.43.0 : thread_proxy()+0x62 [0x7f2d3a1b1ad2]
  /lib/libpthread.so.0 : ()+0x6cb0 [0x7f2d3cdd2cb0]
  /lib/libc.so.6 : clone()+0x6d [0x7f2d3aaaf9fd]
Ошибка сегментирования

[Christophe Dumez (hydr0g3n)]

This is a known libtorrent-rasterbar issue. Would you be able to compile libtorrent with debug and get a debug backtrace with gdb? I guide you through it if necessary.

[Christophe Dumez (hydr0g3n)]

Just to be safe, are you certain that you have the right libtorrent package? (meaning the same version that was used to compile your qbittorrent package).

[Christophe Dumez (hydr0g3n)]

Would anyone be able to test this qBittorrent patch?

[Christophe Dumez (hydr0g3n)]

An easy workaround for this is to disable UPnP:

Type type as a normal user in a terminal:
sed -i "s|Connection\\\UPnP=true|Connection\\\UPnP=false|" ~/.config/qBittorrent/qBittorrent.conf

[Christophe Dumez (hydr0g3n)]

Copying the attached configuration file to ~/.config/qBittorrent folder is safer than my sed command posted earlier. Often, UPnP=false is not present in the configuration file (and default is enabled).