Server side stack trace:

0  0x00007ffff708a428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
#1  0x00007ffff708c02a in __GI_abort () at abort.c:89
#2  0x00007ffff7082bd7 in __assert_fail_base (fmt=<optimized out>, assertion=assertion@entry=0x7ffff5e4ea72 "false", 
    file=file@entry=0x7ffff5e4ea28 "/media/kinga/Dane/mir/mir_nowy/src/server/frontend/protobuf_responder.cpp", line=line@entry=58, 
    function=function@entry=0x7ffff5e4ea80 <mir::frontend::detail::ProtobufResponder::send_response(unsigned int, google::protobuf::MessageLite*, std::vector<std::vector<mir::Fd, std::allocator<mir::Fd> >, std::allocator<std::vector<mir::Fd, std::allocator<mir::Fd> > > > const&)::__PRETTY_FUNCTION__> "virtual void mir::frontend::detail::ProtobufResponder::send_response(google::protobuf::uint32, google::protobuf::MessageLite*, const FdSets&)") at assert.c:92
#3  0x00007ffff7082c82 in __GI___assert_fail (assertion=0x7ffff5e4ea72 "false", file=0x7ffff5e4ea28 "/media/kinga/Dane/mir/mir_nowy/src/server/frontend/protobuf_responder.cpp", 
    line=58, 
    function=0x7ffff5e4ea80 <mir::frontend::detail::ProtobufResponder::send_response(unsigned int, google::protobuf::MessageLite*, std::vector<std::vector<mir::Fd, std::allocator<mir::Fd> >, std::allocator<std::vector<mir::Fd, std::allocator<mir::Fd> > > > const&)::__PRETTY_FUNCTION__> "virtual void mir::frontend::detail::ProtobufResponder::send_response(google::protobuf::uint32, google::protobuf::MessageLite*, const FdSets&)") at assert.c:101
#4  0x00007ffff5d2c537 in mir::frontend::detail::ProtobufResponder::send_response (this=0x7fffd8000a30, id=24, response=0x7fffdfffe2b0, 
    fd_sets=std::vector of length 0, capacity 0) at /media/kinga/Dane/mir/mir_nowy/src/server/frontend/protobuf_responder.cpp:58
#5  0x00007ffff5d1b47d in mir::frontend::detail::ProtobufMessageProcessor::send_response (this=0x7fffd8000e60, id=24, response=0x7fffdfffe2b0)
    at /media/kinga/Dane/mir/mir_nowy/src/server/frontend/protobuf_message_processor.cpp:386
#6  0x00007ffff5d22650 in mir::frontend::detail::invoke<mir::frontend::detail::ProtobufMessageProcessor, mir::frontend::detail::DisplayServer, mir::protobuf::DisplayServer, mir::protobuf::SurfaceModifications, mir::protobuf::Void> (self=0x7fffd8000e60, server=0x7fffd8000bc0, function=&virtual table offset 40, invocation=...)
    at /media/kinga/Dane/mir/mir_nowy/src/include/server/mir/frontend/template_protobuf_message_processor.h:98
#7  0x00007ffff5d1a651 in mir::frontend::detail::ProtobufMessageProcessor::dispatch (this=0x7fffd8000e60, invocation=..., side_channel_fds=std::vector of length 0, capacity 0)
    at /media/kinga/Dane/mir/mir_nowy/src/server/frontend/protobuf_message_processor.cpp:266
#8  0x00007ffff5d469cf in mir::frontend::detail::SocketConnection::on_new_message (this=0x7fffd8000ec0, error=...)
    at /media/kinga/Dane/mir/mir_nowy/src/server/frontend/socket_connection.cpp:123
#9  0x00007ffff5d465f2 in mir::frontend::detail::SocketConnection::on_read_size (this=0x7fffd8000ec0, error=...)
    at /media/kinga/Dane/mir/mir_nowy/src/server/frontend/socket_connection.cpp:82
#10 0x00007ffff5d48676 in std::_Mem_fn_base<void (mir::frontend::detail::SocketConnection::*)(boost::system::error_code const&), true>::operator()<boost::system::error_code const&, void> (this=0x7fffd8009830, __object=0x7fffd8000ec0) at /usr/include/c++/5/functional:600
#11 0x00007ffff5d482e4 in std::_Bind<std::_Mem_fn<void (mir::frontend::detail::SocketConnection::*)(boost::system::error_code const&)> (mir::frontend::detail::SocketConnection*, std::_Placeholder<1>)>::__call<void, boost::system::error_code const&, unsigned long&&, 0ul, 1ul>(std::tuple<boost::system::error_code const&, unsigned long&&>&&, std::_Index_tuple<0ul, 1ul>) (this=0x7fffd8009830, __args=<unknown type in /usr/local/lib/libmirserver.so.44, CU 0x89eff5, DIE 0x8ba2a1>) at /usr/include/c++/5/functional:1074
#12 0x00007ffff5d47e9d in std::_Bind<std::_Mem_fn<void (mir::frontend::detail::SocketConnection::*)(boost::system::error_code const&)> (mir::frontend::detail::SocketConnection*, std::_Placeholder<1>)>::operator()<boost::system::error_code const&, unsigned long, void>(boost::system::error_code const&, unsigned long&&) (this=0x7fffd8009830)
    at /usr/include/c++/5/functional:1133
#13 0x00007ffff5d479ff in std::_Function_handler<void (boost::system::error_code const&, unsigned long), std::_Bind<std::_Mem_fn<void (mir::frontend::detail::SocketConnection::*)(boost::system::error_code const&)> (mir::frontend::detail::SocketConnection*, std::_Placeholder<1>)> >::_M_invoke(std::_Any_data const&, boost::system::error_code const&, unsigned long&&) (__functor=..., __args#0=..., __args#1=<unknown type in /usr/local/lib/libmirserver.so.44, CU 0x89eff5, DIE 0x8b8b5f>) at /usr/include/c++/5/functional:1871
#14 0x00007ffff5d4f827 in std::function<void (boost::system::error_code const&, unsigned long)>::operator()(boost::system::error_code const&, unsigned long) const (
    this=0x7fffdfffec10, __args#0=..., __args#1=2) at /usr/include/c++/5/functional:2267
#15 0x00007ffff5d4ef63 in boost::asio::detail::read_op<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, boost::asio::detail::transfer_exactly_t, std::function<void (boost::system::error_code const&, unsigned long)> >::operator()(boost::system::error_code const&, unsigned long, int) (this=0x7fffdfffebe0, ec=..., bytes_transferred=2, start=0) at /usr/include/boost/asio/impl/read.hpp:282
#16 0x00007ffff5d51602 in boost::asio::detail::binder2<boost::asio::detail::read_op<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, boost::asio::detail::transfer_exactly_t, std::function<void (boost::system::error_code const&, unsigned long)> >, boost::system::error_code, unsigned long>::operator()() (this=0x7fffdfffebe0) at /usr/include/boost/asio/detail/bind_handler.hpp:127
#17 0x00007ffff5d515cf in boost::asio::asio_handler_invoke<boost::asio::detail::binder2<boost::asio::detail::read_op<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, boost::asio::detail::transfer_exactly_t, std::function<void (boost::system::error_code const&, unsigned long)> >, boost::system::error_code, unsigned long> >(boost::asio::detail::binder2<boost::asio::detail::read_op<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, boost::asio::detail::transfer_exactly_t, std::function<void (boost::system::error_code const&, unsigned long)> >, boost::system::error_code, unsigned long>&, ...) (function=...)
    at /usr/include/boost/asio/handler_invoke_hook.hpp:69
#18 0x00007ffff5d51564 in boost_asio_handler_invoke_helpers::invoke<boost::asio::detail::binder2<boost::asio::detail::read_op<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, boost::asio::detail::transfer_exactly_t, std::function<void (boost::system::error_code const&, unsigned long)> >, boost::system::error_code, unsigned long>, std::function<void (boost::system::error_code const&, unsigned long)> >(boost::asio::detail::binder2<boost::asio::detail::read_op<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, boost::asio::detail::transfer_exactly_t, std::function<void (boost::system::error_code const&, unsigned long)> >, boost::system::error_code, unsigned long>&, std::function<void (boost::system::error_code const&, unsigned long)>&) (function=..., context=...)
    at /usr/include/boost/asio/detail/handler_invoke_helpers.hpp:37
---Type <return> to continue, or q <return> to quit---
#19 0x00007ffff5d51445 in boost::asio::detail::asio_handler_invoke<boost::asio::detail::binder2<boost::asio::detail::read_op<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, boost::asio::detail::transfer_exactly_t, std::function<void (boost::system::error_code const&, unsigned long)> >, boost::system::error_code, unsigned long>, 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, boost::asio::detail::transfer_exactly_t, std::function<void (boost::system::error_code const&, unsigned long)> >(boost::asio::detail::binder2<boost::asio::detail::read_op<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, boost::asio::detail::transfer_exactly_t, std::function<void (boost::system::error_code const&, unsigned long)> >, boost::system::error_code, unsigned long>&, boost::asio::detail::read_op<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, boost::asio::detail::transfer_exactly_t, std::function<void (boost::system::error_code const&, unsigned long)> >*) (function=..., this_handler=0x7fffdfffebe0) at /usr/include/boost/asio/impl/read.hpp:502
#20 0x00007ffff5d511d2 in boost_asio_handler_invoke_helpers::invoke<boost::asio::detail::binder2<boost::asio::detail::read_op<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, boost::asio::detail::transfer_exactly_t, std::function<void (boost::system::error_code const&, unsigned long)> >, boost::system::error_code, unsigned long>, boost::asio::detail::read_op<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, boost::asio::detail::transfer_exactly_t, std::function<void (boost::system::error_code const&, unsigned long)> > >(boost::asio::detail::binder2<boost::asio::detail::read_op<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, boost::asio::detail::transfer_exactly_t, std::function<void (boost::system::error_code const&, unsigned long)> >, boost::system::error_code, unsigned long>&, boost::asio::detail::read_op<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, boost::asio::detail::transfer_exactly_t, std::function<void (boost::system::error_code const&, unsigned long)> >&) (function=..., context=...) at /usr/include/boost/asio/detail/handler_invoke_helpers.hpp:37
#21 0x00007ffff5d50e42 in boost::asio::detail::reactive_socket_recv_op<boost::asio::mutable_buffers_1, boost::asio::detail::read_op<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, boost::asio::detail::transfer_exactly_t, std::function<void (boost::system::error_code const&, unsigned long)> > >::do_complete(boost::asio::detail::task_io_service*, boost::asio::detail::task_io_service_operation*, boost::system::error_code const&, unsigned long) (owner=0xa76420, base=0x7fffd8000f90) at /usr/include/boost/asio/detail/reactive_socket_recv_op.hpp:110
#22 0x00007ffff5d3543a in boost::asio::detail::task_io_service_operation::complete (this=0x7fffd8000f90, owner=..., ec=..., bytes_transferred=0)
    at /usr/include/boost/asio/detail/task_io_service_operation.hpp:38
#23 0x00007ffff5d37e63 in boost::asio::detail::task_io_service::do_run_one (this=0xa76420, lock=..., this_thread=..., ec=...)
    at /usr/include/boost/asio/detail/impl/task_io_service.ipp:372
#24 0x00007ffff5d37887 in boost::asio::detail::task_io_service::run (this=0xa76420, ec=...) at /usr/include/boost/asio/detail/impl/task_io_service.ipp:149
#25 0x00007ffff5d3817a in boost::asio::io_service::run (this=0xa76348) at /usr/include/boost/asio/impl/io_service.ipp:59
#26 0x00007ffff5d31d18 in mir::frontend::BasicConnector::<lambda()>::operator()(void) const (__closure=0x9d9648)
    at /media/kinga/Dane/mir/mir_nowy/src/server/frontend/published_socket_connector.cpp:162
#27 0x00007ffff5d34792 in std::_Bind_simple<mir::frontend::BasicConnector::start()::<lambda()>()>::_M_invoke<>(std::_Index_tuple<>) (this=0x9d9648)
    at /usr/include/c++/5/functional:1531
#28 0x00007ffff5d346e8 in std::_Bind_simple<mir::frontend::BasicConnector::start()::<lambda()>()>::operator()(void) (this=0x9d9648) at /usr/include/c++/5/functional:1520
#29 0x00007ffff5d34678 in std::thread::_Impl<std::_Bind_simple<mir::frontend::BasicConnector::start()::<lambda()>()> >::_M_run(void) (this=0x9d9630)
    at /usr/include/c++/5/thread:115
#30 0x00007ffff7909c80 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#31 0x00007ffff74256ba in start_thread (arg=0x7fffdffff700) at pthread_create.c:333
#32 0x00007ffff715b82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109