.
Thread 2 (Thread 21665):
#0  0x00007fc177f0fe33 in __poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=<value optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
        resultvar = 18446744073709551100
        oldtype = 0
        result = <value optimized out>
#1  0x00007fc178b45104 in g_main_context_poll (context=0x13462e0, block=<value optimized out>, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.28.4/./glib/gmain.c:3404
        poll_func = 0x7fc178b55130 <g_poll>
#2  g_main_context_iterate (context=0x13462e0, block=<value optimized out>, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.28.4/./glib/gmain.c:3086
        max_priority = 2147483647
        timeout = -1
        some_ready = <value optimized out>
        nfds = 3
        allocated_nfds = <value optimized out>
        fds = 0x1347100
#3  0x00007fc178b459f2 in g_main_loop_run (loop=0x13462c0) at /build/buildd/glib2.0-2.28.4/./glib/gmain.c:3299
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#4  0x00007fc17952bd44 in gdbus_shared_thread_func (data=<value optimized out>) at /build/buildd/glib2.0-2.28.4/./gio/gdbusprivate.c:276
No locals.
#5  0x00007fc178b6c3e4 in g_thread_create_proxy (data=0x13463c0) at /build/buildd/glib2.0-2.28.4/./glib/gthread.c:1897
        thread = 0x13463c0
        __PRETTY_FUNCTION__ = "g_thread_create_proxy"
#6  0x00007fc17925fd8c in start_thread (arg=0x7fc175d75700) at pthread_create.c:304
        pd = 0x7fc175d75700
        now = <value optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140468882462464, 1371602550863175632, 140737128943984, 140468882463168, 0, 3, -1402305111227097136, -1402278598913810480}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        robust = <value optimized out>
        sp = <value optimized out>
        freesize = <value optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#7  0x00007fc177f1cf7d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#8  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (Thread 21658):
#0  0x00007fc178b1b0a2 in g_atomic_int_exchange_and_add (atomic=0x24, val=-1) at /build/buildd/glib2.0-2.28.4/./glib/gatomic-gcc.c:29
No locals.
#1  0x00007fc178b80b62 in g_variant_unref (value=0x0) at /build/buildd/glib2.0-2.28.4/./glib/gvariant-core.c:617
No locals.
#2  0x00007fc179a0140a in dee_shared_model_revision_free (rev=0x7fc170069940) at dee-shared-model.c:229
        n_cols = 6
        i = <value optimized out>
        row_slice_size = 48
        __PRETTY_FUNCTION__ = "dee_shared_model_revision_free"
#3  0x00007fc179a0181e in flush_revision_queue (self=0x7fc170001270) at dee-shared-model.c:331
        priv = 0x7fc1700012f0
        rev = 0x7fc170069940
        error = <value optimized out>
        iter = 0x140ad40
        schema = <value optimized out>
        aav = {x = {0, 140468784713376, 140468784713377, 140468784720848, 0, 18446744073709551615, 140468785053696, 256, 139, 3, 1033660112, 0, 0, 0, 0, 0}}
        au = {x = {0, 140468784724256, 140468784724257, 140468931090214, 0, 18446744073709551615, 140468785055760, 256, 139, 3, 1033660112, 0, 0, 0, 0, 0}}
        ay = {x = {0, 140468784823552, 140468784823553, 140468931090222, 0, 18446744073709551615, 140468785019904, 256, 139, 3, 1033660112, 0, 0, 0, 0, 0}}
        transaction = {x = {140468957209320, 0, 0, 140468957033680, 4206370, 140468945885056, 4198864, 21474836480, 4294967543, 140468945961825, 20233824, 140468957210176, 140737128942144, 0, 140737128942176, 140468957209320}}
        seqnum_begin = 0
        seqnum_end = 139
        n_cols = 6
        i = <value optimized out>
        __PRETTY_FUNCTION__ = "flush_revision_queue"
#4  0x00007fc179a03ccc in dee_shared_model_flush_revision_queue (self=0x7fc170001270) at dee-shared-model.c:1431
        priv = 0x7fc1700012f0
        error = <value optimized out>
        n_revisions = <value optimized out>
        __PRETTY_FUNCTION__ = "dee_shared_model_flush_revision_queue"
#5  0x0000000000409c7f in unity_applications_place_daemon_update_entry_search_co (data=0x7fc170011020) at daemon.c:825
        __PRETTY_FUNCTION__ = "unity_applications_place_daemon_update_entry_search_co"
#6  0x000000000040a855 in _lambda5_ (_sender=<value optimized out>, pspec=<value optimized out>, self=0x13450e0) at daemon.c:2026
        _tmp1_ = <value optimized out>
        _tmp3_ = <value optimized out>
        section = <value optimized out>
        _tmp5_ = <value optimized out>
        search = 0x0
        _tmp0_ = <value optimized out>
        _tmp2_ = 0x0
        _tmp4_ = <value optimized out>
#7  __lambda5__g_object_notify (_sender=<value optimized out>, pspec=<value optimized out>, self=0x13450e0) at daemon.c:2037
No locals.
#8  0x00007fc17901681c in g_closure_invoke (closure=0x1508cb0, return_value=0x0, n_param_values=2, param_values=0x1680360, invocation_hint=0x7fffea93cc90) at /build/buildd/glib2.0-2.28.4/./gobject/gclosure.c:767
        marshal = <value optimized out>
        marshal_data = <value optimized out>
        in_marshal = 0
        __PRETTY_FUNCTION__ = "g_closure_invoke"
#9  0x00007fc179028019 in signal_emit_unlocked_R (node=<value optimized out>, detail=213, instance=0x135d880, emission_return=0x0, instance_and_params=0x1680360) at /build/buildd/glib2.0-2.28.4/./gobject/gsignal.c:3252
        tmp = <value optimized out>
        handler = 0x14b7b20
        accumulator = 0x0
        emission = {next = 0x0, instance = 0x135d880, ihint = {signal_id = 1, detail = 213, run_type = G_SIGNAL_RUN_FIRST}, state = EMISSION_RUN, chain_type = 4}
        class_closure = 0x13377b0
        handler_list = 0x14b7b20
        return_accu = 0x0
        accu = {g_type = 0, data = {{v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}, {v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}}}
        signal_id = 1
        max_sequential_handler_number = 127
        return_value_altered = 1
#10 0x00007fc179031258 in g_signal_emit_valist (instance=<value optimized out>, signal_id=<value optimized out>, detail=<value optimized out>, var_args=<value optimized out>) at /build/buildd/glib2.0-2.28.4/./gobject/gsignal.c:2983
        instance_and_params = 0x1680360
        signal_return_type = 4
        param_values = 0x1680378
        node = 0x1338060
        i = <value optimized out>
        n_params = 1
        __PRETTY_FUNCTION__ = "g_signal_emit_valist"
#11 0x00007fc17903141f in g_signal_emit (instance=<value optimized out>, signal_id=<value optimized out>, detail=<value optimized out>) at /build/buildd/glib2.0-2.28.4/./gobject/gsignal.c:3040
        var_args = {{gp_offset = 32, fp_offset = 48, overflow_arg_area = 0x7fffea93cf80, reg_save_area = 0x7fffea93cec0}}
#12 0x00007fc179018259 in g_object_dispatch_properties_changed (object=0x135d880, n_pspecs=1, pspecs=<value optimized out>) at /build/buildd/glib2.0-2.28.4/./gobject/gobject.c:925
        i = <value optimized out>
#13 0x00007fc17901a20c in g_object_notify_queue_thaw (object=0x135d880, property_name=<value optimized out>) at /build/buildd/glib2.0-2.28.4/./gobject/gobjectnotifyqueue.c:132
        context = 0x7fc1792577a0
        pspecs_mem = {0x7fc170007920, 0x1697470, 0x7fc179c15000, 0x7fc17a2a9d24, 0x7fc100000005, 0x0, 0x7fc178b07d28, 0x1, 0x1698510, 0x7fc1790384a0, 0x13cbd90, 0x166ccb8, 0x7fc178b8bdcc, 0x13cbd90, 0x0, 0x7fffea93d198}
        pspecs = 0x7fffea93cfd0
        free_me = 0x0
        slist = <value optimized out>
        n_pspecs = <value optimized out>
#14 g_object_notify_by_spec_internal (object=0x135d880, property_name=<value optimized out>) at /build/buildd/glib2.0-2.28.4/./gobject/gobject.c:983
        nqueue = 0x1
#15 g_object_notify (object=0x135d880, property_name=<value optimized out>) at /build/buildd/glib2.0-2.28.4/./gobject/gobject.c:1024
        pspec = <value optimized out>
        __PRETTY_FUNCTION__ = "g_object_notify"
#16 0x00007fc179c2e090 in _dbus_unity_place_entry_service_set_active_section (self=0x13cbd90, parameters=<value optimized out>, invocation=0x1344760) at unity-place.c:3208
        error = 0x0
        _arguments_iter = {x = {23565184, 1, 0, 0, 32, 20444592, 2, 3579507750, 2147483647, 140468940807857, 140468933295776, 140468930428887, 20173056, 1, 0, 20203360}}
        section_id = 0
        _tmp192_ = 0x16890c0
        _reply_message = <value optimized out>
        _reply = <value optimized out>
        _reply_builder = {x = {0, 140468920611264, 6, 0, 0, 140468917327914, 23563472, 140468930620481, 0, 20318928, 6, 140468930614881, 23593488, 34, 1, 140468930620481}}
#17 0x00007fc17951d450 in call_in_idle_cb (user_data=0x1344760) at /build/buildd/glib2.0-2.28.4/./gio/gdbusconnection.c:4427
        invocation = 0x1344760
        vtable = <value optimized out>
        registration_id = <value optimized out>
        subtree_registration_id = <value optimized out>
        __PRETTY_FUNCTION__ = "call_in_idle_cb"
#18 0x00007fc178b44bcd in g_main_dispatch (context=0x13465f0) at /build/buildd/glib2.0-2.28.4/./glib/gmain.c:2440
        dispatch = 0x7fc178b404e0 <g_idle_dispatch>
        was_in_call = 0
        user_data = 0x1344760
        callback = 0x7fc17951d340 <call_in_idle_cb>
        cb_funcs = 0x7fc178def630
        cb_data = 0x1678720
        current_source_link = {data = 0x1696c50, next = 0x0}
        need_destroy = <value optimized out>
        source = 0x1696c50
        current = 0x1347290
        i = <value optimized out>
#19 g_main_context_dispatch (context=0x13465f0) at /build/buildd/glib2.0-2.28.4/./glib/gmain.c:3013
No locals.
#20 0x00007fc178b453a8 in g_main_context_iterate (context=0x13465f0, block=<value optimized out>, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.28.4/./glib/gmain.c:3091
        max_priority = 2147483647
        timeout = 3761
        some_ready = 1
        nfds = 7
        allocated_nfds = <value optimized out>
        fds = <value optimized out>
#21 0x00007fc178b459f2 in g_main_loop_run (loop=0x135fda0) at /build/buildd/glib2.0-2.28.4/./glib/gmain.c:3299
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#22 0x00007fc1795050fd in g_application_run (application=0x1554de0, argc=<value optimized out>, argv=0x0) at /build/buildd/glib2.0-2.28.4/./gio/gapplication.c:1322
        arguments = 0x135fda0
        status = 0
        i = <value optimized out>
        __PRETTY_FUNCTION__ = "g_application_run"
#23 0x000000000040b990 in unity_applications_place_main (args=<value optimized out>, args_length1=<value optimized out>) at main.c:182
        result = 0
        _tmp0_ = <value optimized out>
        _tmp1_ = <value optimized out>
        _tmp2_ = <value optimized out>
        _tmp3_ = <value optimized out>
        _inner_error_ = 0x0
#24 0x00007fc177e55eff in __libc_start_main (main=0x40b9a0 <main>, argc=1, ubp_av=0x7fffea93d4c8, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fffea93d4b8) at libc-start.c:226
        result = <value optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 1371602550863175632, 4223728, 140737128944832, 0, 0, -1371561146706288688, -1402301142111871024}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x412440, 0x7fffea93d4c8}, data = {prev = 0x0, cleanup = 0x0, canceltype = 4269120}}}
        not_first_call = <value optimized out>
#25 0x0000000000407319 in _start ()
No symbol table info available.