.
Thread 5 (LWP 5338):
#0  0x00007f6b3556b83d in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007f6b2c62dc09 in poll (__timeout=-1, __nfds=1, __fds=0x7f6b237fdc50) at /usr/include/x86_64-linux-gnu/bits/poll2.h:46
No locals.
#2  (anonymous namespace)::dispatch_loop(const std::__cxx11::string &, std::shared_ptr<mir::dispatch::ThreadedDispatcher::ThreadShutdownRequestHandler>, std::shared_ptr<mir::dispatch::Dispatchable>, const std::function<void()> &) (name=..., thread_register=..., dispatcher=..., exception_handler=...) at /build/mir-UeyFew/mir-0.19.0+16.04.20160128/src/common/dispatch/threaded_dispatcher.cpp:203
        waiter = {fd = 12, events = 1, revents = 0}
        running = true
        thread_registrar = {deleter = {__thread_register = {<std::__shared_ptr<mir::dispatch::ThreadedDispatcher::ThreadShutdownRequestHandler, (__gnu_cxx::_Lock_policy)2>> = {_M_ptr = 0x7f6b18004f50, _M_refcount = {_M_pi = <optimized out>}}, <No data fields>}}, owner = true}
        __PRETTY_FUNCTION__ = "void {anonymous}::dispatch_loop(const string&, std::shared_ptr<mir::dispatch::ThreadedDispatcher::ThreadShutdownRequestHandler>, std::shared_ptr<mir::dispatch::Dispatchable>, const std::function<void("...
#3  0x00007f6b2c62fe3e in _M_invoke<0ul, 1ul, 2ul, 3ul> (this=<optimized out>) at /usr/include/c++/5/functional:1531
No locals.
#4  operator() (this=<optimized out>) at /usr/include/c++/5/functional:1520
No locals.
#5  std::thread::_Impl<std::_Bind_simple<void (*(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::shared_ptr<mir::dispatch::ThreadedDispatcher::ThreadShutdownRequestHandler>, std::shared_ptr<mir::dispatch::MultiplexingDispatchable>, std::function<void ()>))(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::shared_ptr<mir::dispatch::ThreadedDispatcher::ThreadShutdownRequestHandler>, std::shared_ptr<mir::dispatch::Dispatchable>, std::function<void ()> const&)> >::_M_run() (this=<optimized out>) at /usr/include/c++/5/thread:115
No locals.
#6  0x00007f6b35b09ce0 in std::(anonymous namespace)::execute_native_thread_routine (__p=<optimized out>) at ../../../../../src/libstdc++-v3/src/c++11/thread.cc:84
        __t = <optimized out>
        __local = {<std::__shared_ptr<std::thread::_Impl_base, (__gnu_cxx::_Lock_policy)2>> = {_M_ptr = <optimized out>, _M_refcount = {_M_pi = 0x7f6b180051d0}}, <No data fields>}
#7  0x00007f6b33f8f66a in start_thread (arg=0x7f6b237fe700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7f6b237fe700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140098133812992, -6859297116330834487, 0, 140098142199439, 140098133813696, 140097940901568, 6780353282104444361, 6780317039709341129}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#8  0x00007f6b35576e4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.
.
Thread 4 (LWP 5332):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
No locals.
#1  0x00007f6b2cce087c in futex (val3=0, uaddr2=0x0, timeout=0x0, val=0, op=0, uaddr=<optimized out>) at /usr/include/urcu/futex.h:65
No locals.
#2  futex_async (op=0, val=0, timeout=0x0, uaddr2=0x0, val3=0, uaddr=<optimized out>) at /usr/include/urcu/futex.h:88
No locals.
#3  wait_for_sessiond (sock_info=0x7f6b2cf28480 <local_apps>) at lttng-ust-comm.c:1170
No locals.
#4  ust_listener_thread (arg=0x7f6b2cf28480 <local_apps>) at lttng-ust-comm.c:1222
        sock_info = 0x7f6b2cf28480 <local_apps>
        sock = <optimized out>
        ret = <optimized out>
        prev_connect_failed = <optimized out>
        has_waited = <optimized out>
        timeout = 1000
        __func__ = "ust_listener_thread"
        __PRETTY_FUNCTION__ = "ust_listener_thread"
#5  0x00007f6b33f8f66a in start_thread (arg=0x7f6b28dfe700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7f6b28dfe700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140098223990528, -6859297116330834487, 0, 140724236453407, 140098223991232, 0, 6780362902831187401, 6780317039709341129}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#6  0x00007f6b35576e4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.
.
Thread 3 (LWP 5331):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
No locals.
#1  0x00007f6b2cce087c in futex (val3=0, uaddr2=0x0, timeout=0x0, val=0, op=0, uaddr=<optimized out>) at /usr/include/urcu/futex.h:65
No locals.
#2  futex_async (op=0, val=0, timeout=0x0, uaddr2=0x0, val3=0, uaddr=<optimized out>) at /usr/include/urcu/futex.h:88
No locals.
#3  wait_for_sessiond (sock_info=0x7f6b2cf2a4c0 <global_apps>) at lttng-ust-comm.c:1170
No locals.
#4  ust_listener_thread (arg=0x7f6b2cf2a4c0 <global_apps>) at lttng-ust-comm.c:1222
        sock_info = 0x7f6b2cf2a4c0 <global_apps>
        sock = <optimized out>
        ret = <optimized out>
        prev_connect_failed = <optimized out>
        has_waited = <optimized out>
        timeout = 4
        __func__ = "ust_listener_thread"
        __PRETTY_FUNCTION__ = "ust_listener_thread"
#5  0x00007f6b33f8f66a in start_thread (arg=0x7f6b295ff700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7f6b295ff700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140098232383232, -6859297116330834487, 0, 140724236453407, 140098232383936, 0, 6780366200829199817, 6780317039709341129}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#6  0x00007f6b35576e4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.
.
Thread 2 (LWP 5295):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
No locals.
#1  0x00007f6b2da15352 in qRegisterMetaType<qtmir::SizeHints> (defined=QtPrivate::MetaTypeDefinedHelper<qtmir::SizeHints, true>::Defined, dummy=0xffffffffffffffff, typeName=0x7f6b2da57a4c "qtmir::SizeHints") at /usr/include/x86_64-linux-gnu/qt5/QtCore/qmetatype.h:1703
        normalizedTypeName = {static MaxSize = 1073741800, d = 0x7ffcea201570}
#2  qt_metatype_id () at /build/qtmir-gles-8kNXkL/qtmir-gles-0.4.7+16.04.20160212/src/platforms/mirserver/sizehints.h:50
        metatype_id = {_q_value = 0}
        metatype_id = {_q_value = 0}
#3  qt_metatype_id () at /usr/include/x86_64-linux-gnu/qt5/QtCore/qmetatype.h:1584
No locals.
#4  qMetaTypeId<qtmir::SizeHints> () at /usr/include/x86_64-linux-gnu/qt5/QtCore/qmetatype.h:1726
No locals.
#5  qRegisterMetaType<qtmir::SizeHints> () at /usr/include/x86_64-linux-gnu/qt5/QtCore/qmetatype.h:1732
No locals.
#6  SessionListener::SessionListener (this=0x142fedcc706aa3a4, parent=<optimized out>) at /build/qtmir-gles-8kNXkL/qtmir-gles-0.4.7+16.04.20160212/src/platforms/mirserver/sessionlistener.cpp:37
No locals.
#7  0x0000000000050501 in ?? ()
No symbol table info available.
#8  0x00007ffcea201520 in ?? ()
No symbol table info available.
#9  0x00007f6b36059b4c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /tmp/apport_sandbox_AivIfB/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#10 0x00007f6b3608fec7 in QObjectPrivate::setParent_helper(QObject*) () from /tmp/apport_sandbox_AivIfB/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#11 0x00007f6b3605de5d in QCoreApplication::init() () from /tmp/apport_sandbox_AivIfB/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#12 0x00007f6b3605e036 in QCoreApplication::QCoreApplication(QCoreApplicationPrivate&) () from /tmp/apport_sandbox_AivIfB/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
No symbol table info available.
#13 0x00007f6b367c697d in QGuiApplication::QGuiApplication(int&, char**, int) () from /tmp/apport_sandbox_AivIfB/usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
No symbol table info available.
#14 0x0000000000409427 in ShellApplication::ShellApplication (this=0x7b1c80, argc=<optimized out>, argv=<optimized out>, isMirServer=<optimized out>) at /build/unity8-VYnKoP/unity8-8.11+16.04.20160129/src/ShellApplication.cpp:34
No locals.
#15 0x0000000000406885 in main (argc=1, argv=0x7ffcea201978) at /build/unity8-VYnKoP/unity8-8.11+16.04.20160129/src/main.cpp:28
        isMirServer = <optimized out>
        application = <optimized out>
        result = <optimized out>
.
Thread 1 (LWP 5337):
#0  0x00007f6b30e586e7 in XGetXCBConnection (dpy=0x7f6b10001620) at ../../src/x11_xcb.c:9
No locals.
#1  0x00007f6b2cf43694 in swrast_update_buffers () from /tmp/apport_sandbox_AivIfB/usr/lib/x86_64-linux-gnu/mesa-egl/libEGL.so.1
No symbol table info available.
#2  0x0000000000000000 in ?? ()
No symbol table info available.