.
Thread 3 (Thread 0x7f031689c700 (LWP 9321)):
#0  0x00007f031b1f6bfd in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007f031b93cfc4 in g_main_context_poll (priority=2147483647, n_fds=2, fds=0x7f03080010c0, timeout=-1, context=0x7f031ef70400) at /build/buildd/glib2.0-2.41.1/./glib/gmain.c:4028
        poll_func = 0x7f031b94bb00 <g_poll>
#2  g_main_context_iterate (context=0x7f031ef70400, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.41.1/./glib/gmain.c:3729
        max_priority = 2147483647
        timeout = -1
        some_ready = <optimized out>
        nfds = 2
        allocated_nfds = 2
        fds = 0x7f03080010c0
#3  0x00007f031b93d2ea in g_main_loop_run (loop=0x7f031ef33ce0) at /build/buildd/glib2.0-2.41.1/./glib/gmain.c:3928
        __FUNCTION__ = "g_main_loop_run"
#4  0x00007f031ae690c6 in gdbus_shared_thread_func (user_data=0x7f031ef703d0) at /build/buildd/glib2.0-2.41.1/./gio/gdbusprivate.c:273
        data = 0x7f031ef703d0
#5  0x00007f031b961f65 in g_thread_proxy (data=0x7f031ef604a0) at /build/buildd/glib2.0-2.41.1/./glib/gthread.c:764
        thread = 0x7f031ef604a0
#6  0x00007f031a96e165 in start_thread (arg=0x7f031689c700) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7f031689c700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139651239757568, 5827347661196471565, 0, 0, 139651239758272, 139651239757568, -5847703381731070707, -5847694322471031539}, 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"
#7  0x00007f031b2014dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.
.
Thread 2 (Thread 0x7f031709d700 (LWP 9320)):
#0  0x00007f031b1f6bfd in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007f031b93cfc4 in g_main_context_poll (priority=2147483647, n_fds=1, fds=0x7f03100008e0, timeout=-1, context=0x7f031ef60140) at /build/buildd/glib2.0-2.41.1/./glib/gmain.c:4028
        poll_func = 0x7f031b94bb00 <g_poll>
#2  g_main_context_iterate (context=context@entry=0x7f031ef60140, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.41.1/./glib/gmain.c:3729
        max_priority = 2147483647
        timeout = -1
        some_ready = <optimized out>
        nfds = 1
        allocated_nfds = 1
        fds = 0x7f03100008e0
#3  0x00007f031b93d0cc in g_main_context_iteration (context=0x7f031ef60140, may_block=may_block@entry=1) at /build/buildd/glib2.0-2.41.1/./glib/gmain.c:3795
        retval = <optimized out>
#4  0x00007f031b93d109 in glib_worker_main (data=<optimized out>) at /build/buildd/glib2.0-2.41.1/./glib/gmain.c:5541
No locals.
#5  0x00007f031b961f65 in g_thread_proxy (data=0x7f031ef60400) at /build/buildd/glib2.0-2.41.1/./glib/gthread.c:764
        thread = 0x7f031ef60400
#6  0x00007f031a96e165 in start_thread (arg=0x7f031709d700) at pthread_create.c:309
        __res = <optimized out>
        pd = 0x7f031709d700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139651248150272, 5827347661196471565, 0, 0, 139651248150976, 139651248150272, -5847700084806800115, -5847694322471031539}, 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"
#7  0x00007f031b2014dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.
.
Thread 1 (Thread 0x7f031cff2840 (LWP 9319)):
#0  0x00007f031b13d117 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
        resultvar = 0
        pid = 9319
        selftid = 9319
#1  0x00007f031b13e808 in __GI_abort () at abort.c:89
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x7fff0ef71f7c, sa_sigaction = 0x7fff0ef71f7c}, sa_mask = {__val = {139651317251462, 139651319674696, 194, 4294967295, 139651315890467, 0, 140733444456448, 95008873552, 278, 0, 0, 0, 0, 21474836480, 139651348320256, 139651317266608}}, sa_flags = 458045217, sa_restorer = 0x7f031b4d3ad0}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007f031b135fc6 in __assert_fail_base (fmt=0x7f031b2878b0 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x7f031b4d3721 "data", file=file@entry=0x7f031b4d3748 "plist.c", line=line@entry=194, function=function@entry=0x7f031b4d3ad0 "plist_copy_node") at assert.c:92
        str = 0x7f031ef98f70 "@\271\371\036\003\177"
        total = 4096
#3  0x00007f031b136072 in __GI___assert_fail (assertion=0x7f031b4d3721 "data", file=0x7f031b4d3748 "plist.c", line=194, function=0x7f031b4d3ad0 "plist_copy_node") at assert.c:101
No locals.
#4  0x00007f031b4d1fbf in ?? () from /tmp/apport_sandbox_7Q_fKf/usr/lib/x86_64-linux-gnu/libplist.so.2
No symbol table info available.
#5  0x00007f031b4d1fd7 in plist_copy () from /tmp/apport_sandbox_7Q_fKf/usr/lib/x86_64-linux-gnu/libplist.so.2
No symbol table info available.
#6  0x00007f031b6dfc33 in lockdownd_pair_record_to_plist (pair_record=0x0) at lockdown.c:827
        dict = 0x7f031b6ec5fd
#7  lockdownd_do_pair (client=0x7f031ef96f40, pair_record=0x0, verb=0x7fff0ef70238 "") at lockdown.c:933
        ret = -256
        pair_record_plist = 0x0
        wifi_node = 0x0
        pairing_mode = 0
        request_pair_record = <optimized out>
        options = <optimized out>
#8  0x00007fff0ef70248 in ?? ()
No symbol table info available.
#9  0x00007f031ef6c410 in ?? ()
No symbol table info available.
#10 0x00007f031b6e0a8f in lockdownd_client_new_with_handshake (device=<optimized out>, client=0x7fff0ef70238, client@entry=0x7fff0ef702f8, label=label@entry=0x7f031d050965 "upower") at lockdown.c:742
        ret = <optimized out>
        client_loc = 0x7f031ef96f40
        host_id = 0x0
        type = 0x7f031ef9d080 "\020\321\371\036\003\177"
        pair_record = 0x0
#11 0x00007f031d04599f in up_device_idevice_coldplug (device=0x7f031ef6c510) at up-device-idevice.c:105
        idevice = 0x7f031ef6c510
        native = 0x7f031ef60a10
        uuid = 0x7f031ef9d270 "f1712bb740f77dd08b8a70d324e6be1c502b6f6f"
        model = <optimized out>
        dict = 0x7f0308001da0
        node = <optimized out>
        poll_seconds = 0
        dev = 0x7f031ef96940
        client = 0x0
        kind = <optimized out>
#12 0x00007f031d03e2eb in up_device_coldplug (device=device@entry=0x7f031ef6c510, daemon=<optimized out>, native=<optimized out>) at up-device.c:564
        ret = <optimized out>
        native_path = <optimized out>
        klass = 0x7f031ef8fcb0
        id = 0x0
        __FUNCTION__ = "up_device_coldplug"
#13 0x00007f031d044547 in up_backend_device_new (native=0x7f031ef60a10, backend=0x7f031ef75100) at up-backend.c:155
        native_path = <optimized out>
        device = 0x7f031ef6c510
        ret = <optimized out>
        subsys = <optimized out>
        input = <optimized out>
#14 up_backend_device_add (backend=backend@entry=0x7f031ef75100, native=0x7f031ef60a10) at up-backend.c:253
        object = <optimized out>
        device = <optimized out>
#15 0x00007f031d044dab in up_backend_coldplug (backend=0x7f031ef75100, daemon=daemon@entry=0x7f031ef778c0) at up-backend.c:352
        native = <optimized out>
        devices = 0x7f031ef78f80
        l = 0x7f031ef78e80
        i = <optimized out>
        ret = <optimized out>
        subsystems_wup = {0x7f031d05107e "power_supply", 0x7f031d051093 "usb", 0x7f031d051097 "usbmisc", 0x7f031d05108f "tty", 0x7f031d05109f "input", 0x7f031d05108b "hid", 0x0}
        subsystems = {0x7f031d05107e "power_supply", 0x7f031d051093 "usb", 0x7f031d051097 "usbmisc", 0x7f031d05109f "input", 0x7f031d05108b "hid", 0x0}
#16 0x00007f031d03bc07 in up_daemon_startup (daemon=0x7f031ef778c0) at up-daemon.c:819
        ret = <optimized out>
        on_battery = <optimized out>
        on_low_battery = <optimized out>
        priv = 0x7f031ef77830
#17 0x00007f031d039a88 in main (argc=1, argv=0x7fff0ef706b8) at up-main.c:292
        error = 0x0
        daemon = 0x7f031ef778c0
        qos = 0x7f031ef5e9c0
        kbd_backlight = 0x7f031ef62420
        wakeups = 0x7f031ef607a0
        context = 0x7f031ef572f0
        bus_proxy = <optimized out>
        bus = <optimized out>
        ret = <optimized out>
        retval = 1
        timed_exit = 0
        immediate_exit = 0
        timer_id = 0
        verbose = 0
        options = {{long_name = 0x7f031d050cce "timed-exit", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_NONE, arg_data = 0x7fff0ef704d0, description = 0x7f031d050cd9 "Exit after a small delay", arg_description = 0x0}, {long_name = 0x7f031d050cf2 "immediate-exit", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_NONE, arg_data = 0x7fff0ef704d4, description = 0x7f031d050da0 "Exit after the engine has loaded", arg_description = 0x0}, {long_name = 0x7f031d050d01 "verbose", short_name = 118 'v', flags = 0, arg = G_OPTION_ARG_NONE, arg_data = 0x7fff0ef704d8, description = 0x7f031d050dc8 "Show extra debugging information", arg_description = 0x0}, {long_name = 0x0, short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_NONE, arg_data = 0x0, description = 0x0, arg_description = 0x0}}