#0  0x00007ffff6be2a50 in __cxa_throw () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#1  0x00007ffff79a263e in boost::throw_exception<boost::system::system_error> (e=...) at /usr/include/boost/throw_exception.hpp:67
#2  0x00007ffff799c7c1 in boost::asio::detail::do_throw_error (err=..., location=0x7ffff7ab322d "write") at /usr/include/boost/asio/detail/impl/throw_error.ipp:38
#3  0x00007ffff799c557 in boost::asio::detail::throw_error (err=..., location=0x7ffff7ab322d "write") at /usr/include/boost/asio/detail/throw_error.hpp:42
#4  0x00007ffff79cee63 in boost::asio::write<boost::asio::basic_stream_socket<boost::asio::local::stream_protocol, boost::asio::stream_socket_service<boost::asio::local::stream_protocol> >, boost::asio::mutable_buffers_1> (s=..., buffers=...) at /usr/include/boost/asio/impl/write.hpp:62
#5  0x00007ffff79cd69a in mir::frontend::detail::SocketMessenger::send (this=0x7fffe0043018, body=...)
    at /home/dan/bzr/mir/pipe/src/server/frontend/socket_messenger.cpp:62
#6  0x00007ffff79d2cd2 in mir::frontend::detail::EventSender::send_event_sequence (this=0x7fffe0016d88, seq=...)
    at /home/dan/bzr/mir/pipe/src/server/frontend/event_sender.cpp:83
#7  0x00007ffff79d2ac3 in mir::frontend::detail::EventSender::handle_event (this=0x7fffe0016d88, e=...) at /home/dan/bzr/mir/pipe/src/server/frontend/event_sender.cpp:48
#8  0x00007ffff7a29696 in mir::shell::Surface::notify_change (this=0x7fffe00806a8, attrib=mir_surface_attrib_focus, value=0)
    at /home/dan/bzr/mir/pipe/src/server/shell/surface.cpp:317
#9  0x00007ffff7a293e0 in mir::shell::Surface::configure (this=0x7fffe00806a8, attrib=mir_surface_attrib_focus, value=0)
    at /home/dan/bzr/mir/pipe/src/server/shell/surface.cpp:246
#10 0x00007ffff7a25ec9 in mir::shell::DefaultFocusMechanism::set_focus_to (this=0xad73c8, focus_session=...)
    at /home/dan/bzr/mir/pipe/src/server/shell/default_focus_mechanism.cpp:51
#11 0x00007ffff7a234cb in mir::shell::SessionManager::set_focus_to_locked (this=0xae4a78, shell_session=...)
    at /home/dan/bzr/mir/pipe/src/server/shell/session_manager.cpp:101
#12 0x00007ffff7a22ac3 in mir::shell::SessionManager::close_session (this=0xae4a78, session=...) at /home/dan/bzr/mir/pipe/src/server/shell/session_manager.cpp:130
#13 0x00007ffff79c1002 in mir::frontend::SessionMediator::~SessionMediator (this=0x7fffe00794b8, __in_chrg=<optimised out>)
    at /home/dan/bzr/mir/pipe/src/server/frontend/session_mediator.cpp:79
#14 0x00007ffff7998fd9 in __gnu_cxx::new_allocator<mir::frontend::SessionMediator>::destroy<mir::frontend::SessionMediator> (this=0x7fffe00794b0, __p=0x7fffe00794b8)
    at /usr/include/c++/4.8/ext/new_allocator.h:124
#15 0x00007ffff7997709 in std::allocator_traits<std::allocator<mir::frontend::SessionMediator> >::_S_destroy<mir::frontend::SessionMediator> (__a=...,
    __p=0x7fffe00794b8) at /usr/include/c++/4.8/bits/alloc_traits.h:281
#16 0x00007ffff799605e in std::allocator_traits<std::allocator<mir::frontend::SessionMediator> >::destroy<mir::frontend::SessionMediator> (__a=..., __p=0x7fffe00794b8)
    at /usr/include/c++/4.8/bits/alloc_traits.h:405
#17 0x00007ffff7993ce7 in std::_Sp_counted_ptr_inplace<mir::frontend::SessionMediator, std::allocator<mir::frontend::SessionMediator>, (__gnu_cxx::_Lock_policy)2>::_M_dispose (this=0x7fffe00794a0) at /usr/include/c++/4.8/bits/shared_ptr_base.h:407
#18 0x000000000045315a in std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_release (this=0x7fffe00794a0) at /usr/include/c++/4.8/bits/shared_ptr_base.h:144
#19 0x0000000000452a8d in std::__shared_count<(__gnu_cxx::_Lock_policy)2>::~__shared_count (this=0x7fffe00778f8, __in_chrg=<optimised out>)
    at /usr/include/c++/4.8/bits/shared_ptr_base.h:553
#20 0x00007ffff79c5e1a in std::__shared_ptr<mir::protobuf::DisplayServer, (__gnu_cxx::_Lock_policy)2>::~__shared_ptr (this=0x7fffe00778f0, __in_chrg=<optimised out>)
    at /usr/include/c++/4.8/bits/shared_ptr_base.h:810
#21 0x00007ffff79c5e34 in std::shared_ptr<mir::protobuf::DisplayServer>::~shared_ptr (this=0x7fffe00778f0, __in_chrg=<optimised out>)
    at /usr/include/c++/4.8/bits/shared_ptr.h:93
#22 0x00007ffff79c5ea4 in mir::frontend::detail::ProtobufMessageProcessor::~ProtobufMessageProcessor (this=0x7fffe00778d8, __in_chrg=<optimised out>)
    at /home/dan/bzr/mir/pipe/src/server/frontend/protobuf_message_processor.h:56
#23 0x00007ffff79e0325 in __gnu_cxx::new_allocator<mir::frontend::detail::ProtobufMessageProcessor>::destroy<mir::frontend::detail::ProtobufMessageProcessor> (
    this=0x7fffe00778d0, __p=0x7fffe00778d8) at /usr/include/c++/4.8/ext/new_allocator.h:124
#24 0x00007ffff79e0173 in std::allocator_traits<std::allocator<mir::frontend::detail::ProtobufMessageProcessor> >::_S_destroy<mir::frontend::detail::ProtobufMessageProcessor> (__a=..., __p=0x7fffe00778d8) at /usr/include/c++/4.8/bits/alloc_traits.h:281
#25 0x00007ffff79dffb7 in std::allocator_traits<std::allocator<mir::frontend::detail::ProtobufMessageProcessor> >::destroy<mir::frontend::detail::ProtobufMessageProcessor> (__a=..., __p=0x7fffe00778d8) at /usr/include/c++/4.8/bits/alloc_traits.h:405
#26 0x00007ffff79df98b in std::_Sp_counted_ptr_inplace<mir::frontend::detail::ProtobufMessageProcessor, std::allocator<mir::frontend::detail::ProtobufMessageProcessor>, (__gnu_cxx::_Lock_policy)2>::_M_dispose (this=0x7fffe00778c0) at /usr/include/c++/4.8/bits/shared_ptr_base.h:407