.
Thread 4 (Thread 0x7f28e0b6d700 (LWP 30150)):
#0  __lll_unlock_wake () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:368
No locals.
#1  0x00007f28ed9c6104 in _L_unlock_644 () from /tmp/tmpfUPG9b/lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#2  0x00007f28ed9c6063 in __pthread_mutex_unlock_usercnt (mutex=<optimized out>, decr=<optimized out>) at pthread_mutex_unlock.c:52
        type = 1
#3  __pthread_mutex_unlock (mutex=0x21f2600) at pthread_mutex_unlock.c:290
No locals.
#4  0x00007f28ee326201 in g_mutex_unlock (mutex=mutex@entry=0x21f2540) at /build/buildd/glib2.0-2.33.6/./glib/gthread-posix.c:227
        _g_boolean_var_ = <optimized out>
        status = <optimized out>
#5  0x00007f28ee2e80fc in g_source_attach (source=source@entry=0x7f28d4001180, context=0x21f2540) at /build/buildd/glib2.0-2.33.6/./glib/gmain.c:1077
        result = 283
        __PRETTY_FUNCTION__ = "g_source_attach"
#6  0x00007f28eea79f20 in run_in_thread (job=<optimized out>, c=<optimized out>, _data=0x7f28dc0085e0) at /build/buildd/glib2.0-2.33.6/./gio/gsimpleasyncresult.c:877
        data = 0x7f28dc0085e0
        simple = 0x7f28dc003330
        source = 0x7f28d4001180
#7  0x00007f28eea66cd6 in io_job_thread (data=0x7f28dc00a4a0, user_data=<optimized out>) at /build/buildd/glib2.0-2.33.6/./gio/gioscheduler.c:168
        job = 0x7f28dc00a4a0
        result = <optimized out>
#8  0x00007f28ee30d5b2 in g_thread_pool_thread_proxy (data=<optimized out>) at /build/buildd/glib2.0-2.33.6/./glib/gthreadpool.c:309
        task = 0x7f28dc00a4a0
        pool = 0x2284e70
#9  0x00007f28ee30cdb5 in g_thread_proxy (data=0x7f28dc0065e0) at /build/buildd/glib2.0-2.33.6/./glib/gthread.c:801
        thread = 0x7f28dc0065e0
#10 0x00007f28ed9c2e9a in start_thread (arg=0x7f28e0b6d700) at pthread_create.c:308
        __res = <optimized out>
        pd = 0x7f28e0b6d700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -4317734510171098455, 139813586266272, 139813545499072, 36710272, 3, 4198923010896196265, 4198912235802620585}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#11 0x00007f28ed6f04bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#12 0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 3 (Thread 0x7f28e324f700 (LWP 30110)):
#0  0x00007f28ed6e4b03 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
        resultvar = <optimized out>
        oldtype = 0
        result = <optimized out>
#1  0x00007f28ee2e9f34 in g_main_context_poll (n_fds=5, fds=0x7f28dc00a5d0, timeout=-1, context=0x21f2540, priority=<optimized out>) at /build/buildd/glib2.0-2.33.6/./glib/gmain.c:3560
        poll_func = 0x7f28ee2f7db0 <g_poll>
#2  g_main_context_iterate (context=0x21f2540, block=block@entry=1, dispatch=dispatch@entry=1, self=<error reading variable: Unhandled dwarf expression opcode 0xfa>) at /build/buildd/glib2.0-2.33.6/./glib/gmain.c:3261
        max_priority = 2147483647
        timeout = -1
        some_ready = <optimized out>
        nfds = 5
        allocated_nfds = <optimized out>
        fds = 0x7f28dc00a5d0
#3  0x00007f28ee2ea392 in g_main_loop_run (loop=0x21f24d0) at /build/buildd/glib2.0-2.33.6/./glib/gmain.c:3460
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#4  0x00007f28eeadd1d6 in gdbus_shared_thread_func (user_data=0x21f2510) at /build/buildd/glib2.0-2.33.6/./gio/gdbusprivate.c:277
        data = 0x21f2510
#5  0x00007f28ee30cdb5 in g_thread_proxy (data=0x222c0a0) at /build/buildd/glib2.0-2.33.6/./glib/gthread.c:801
        thread = 0x222c0a0
#6  0x00007f28ed9c2e9a in start_thread (arg=0x7f28e324f700) at pthread_create.c:308
        __res = <optimized out>
        pd = 0x7f28e324f700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -4317734510171098455, 140733887710304, 139813586270656, 0, 3, 4198926188098253481, 4198912235802620585}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#7  0x00007f28ed6f04bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#8  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 2 (Thread 0x7f28e136e700 (LWP 30111)):
#0  0x00007f28ed6e4b03 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
        resultvar = <optimized out>
        oldtype = 0
        result = <optimized out>
#1  0x00007f28ee2e9f34 in g_main_context_poll (n_fds=1, fds=0x7f28d00010c0, timeout=-1, context=0x22db740, priority=<optimized out>) at /build/buildd/glib2.0-2.33.6/./glib/gmain.c:3560
        poll_func = 0x7f28ee2f7db0 <g_poll>
#2  g_main_context_iterate (context=context@entry=0x22db740, block=block@entry=1, dispatch=dispatch@entry=1, self=<error reading variable: Unhandled dwarf expression opcode 0xfa>) at /build/buildd/glib2.0-2.33.6/./glib/gmain.c:3261
        max_priority = 2147483647
        timeout = -1
        some_ready = <optimized out>
        nfds = 1
        allocated_nfds = <optimized out>
        fds = 0x7f28d00010c0
#3  0x00007f28ee2ea054 in g_main_context_iteration (context=context@entry=0x22db740, may_block=may_block@entry=1) at /build/buildd/glib2.0-2.33.6/./glib/gmain.c:3327
        retval = <optimized out>
#4  0x00007f28e137535d in dconf_gdbus_worker_thread (user_data=0x22db740) at dconf-gdbus-thread.c:81
        context = 0x22db740
#5  0x00007f28ee30cdb5 in g_thread_proxy (data=0x22d9a80) at /build/buildd/glib2.0-2.33.6/./glib/gthread.c:801
        thread = 0x22d9a80
#6  0x00007f28ed9c2e9a in start_thread (arg=0x7f28e136e700) at pthread_create.c:308
        __res = <optimized out>
        pd = 0x7f28e136e700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -4317734510171098455, 140733887711104, 139813553891776, 0, 3, 4198921911921439401, 4198912235802620585}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#7  0x00007f28ed6f04bd 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 0x7f28f03b0940 (LWP 30109)):
#0  fast_validate (str=<optimized out>) at /build/buildd/glib2.0-2.33.6/./glib/gutf8.c:1461
        val = <optimized out>
        min = <optimized out>
        p = 0x51 <Address 0x51 out of bounds>
#1  g_utf8_validate (str=str@entry=0x51 <Address 0x51 out of bounds>, max_len=max_len@entry=-1, end=end@entry=0x0) at /build/buildd/glib2.0-2.33.6/./glib/gutf8.c:1629
        p = <optimized out>
#2  0x00007f28ee317767 in g_variant_new_string (string=0x51 <Address 0x51 out of bounds>) at /build/buildd/glib2.0-2.33.6/./glib/gvariant.c:1270
        _g_boolean_var_ = <optimized out>
#3  0x00007f28ee31793a in g_variant_new_strv (strv=strv@entry=0x2237a80, length=<optimized out>, length@entry=-1) at /build/buildd/glib2.0-2.33.6/./glib/gvariant.c:1497
        strings = 0x233c720
        i = <optimized out>
        __PRETTY_FUNCTION__ = "g_variant_new_strv"
#4  0x00007f28eeabd028 in g_settings_set_strv (settings=settings@entry=0x7f28dc0061e0, key=key@entry=0x7f28ef8cee8a "blacklisted-media-players", value=value@entry=0x2237a80) at /build/buildd/glib2.0-2.33.6/./gio/gsettings.c:1875
        array = <optimized out>
#5  0x00007f28ef8bee11 in unity_blacklist_manager_add_to_blacklist (self=<optimized out>) at unity-sound-menu-mpris.c:2405
        _tmp3_ = 0x239bbf0
        _tmp14_ = <optimized out>
        _tmp19_ = 0x2237a80
        _tmp20__length1 = 3
        _tmp1_ = 0x232bbe0
        already_bl = 0x232bbe0
        _tmp17_ = 0x239bbf0
        _tmp20_ = 0x2237a80
        _tmp4_ = 0x232bbe0
        _tmp15_ = 0x0
        _tmp18_ = 3
        _tmp2_ = 0x232bbe0
        _tmp4__length1 = <optimized out>
        _tmp13_ = 0x239bbf0
        _tmp0_ = <optimized out>
        _tmp16_ = 0x7f28dc0061e0
        _already_bl_size_ = <optimized out>
        new_bl = 0x239bbf0
#6  unity_blacklist_manager_consumer_blacklist_change (self=<optimized out>) at unity-sound-menu-mpris.c:2189
        _tmp0_ = <optimized out>
        _tmp1_ = <optimized out>
        _tmp2_ = <optimized out>
#7  _unity_blacklist_manager_consumer_blacklist_change_g_object_notify (_sender=<optimized out>, pspec=<optimized out>, self=<optimized out>) at unity-sound-menu-mpris.c:2156
No locals.
#8  0x00007f28ee5a8050 in g_closure_invoke (closure=0x23afc10, return_value=0x0, n_param_values=2, param_values=0x7fff296285b0, invocation_hint=0x7fff29628550) at /build/buildd/glib2.0-2.33.6/./gobject/gclosure.c:777
        marshal = 0x7f28ee5aafc0 <g_cclosure_marshal_VOID__PARAM>
        marshal_data = 0x0
        in_marshal = 0
        real_closure = 0x23afbf0
        __PRETTY_FUNCTION__ = "g_closure_invoke"
#9  0x00007f28ee5b9d30 in signal_emit_unlocked_R (node=node@entry=0x21c6a20, detail=detail@entry=1886, instance=instance@entry=0x2335700, emission_return=emission_return@entry=0x0, instance_and_params=instance_and_params@entry=0x7fff296285b0) at /build/buildd/glib2.0-2.33.6/./gobject/gsignal.c:3551
        tmp = <optimized out>
        handler = 0x7f28dc00ce00
        accumulator = 0x0
        emission = {next = 0x0, instance = 0x2335700, ihint = {signal_id = 1, detail = 1886, run_type = G_SIGNAL_RUN_FIRST}, state = EMISSION_RUN, chain_type = 4}
        class_closure = 0x21c0940
        hlist = 0x7f28dc00ce00
        handler_list = 0x7f28dc00ce00
        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 = 314
        return_value_altered = 1
#10 0x00007f28ee5c1fb1 in g_signal_emit_valist (instance=0x2335700, signal_id=<optimized out>, detail=1886, var_args=var_args@entry=0x7fff29628808) at /build/buildd/glib2.0-2.33.6/./gobject/gsignal.c:3300
        instance_and_params = 0x7fff296285b0
        signal_return_type = 4
        param_values = 0x7fff296285c8
        node = 0x21c6a20
        i = <optimized out>
        n_params = 1
        __PRETTY_FUNCTION__ = "g_signal_emit_valist"
#11 0x00007f28ee5c2202 in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>) at /build/buildd/glib2.0-2.33.6/./gobject/gsignal.c:3356
        var_args = {{gp_offset = 32, fp_offset = 48, overflow_arg_area = 0x7fff296288e0, reg_save_area = 0x7fff29628820}}
#12 0x00007f28ee5acb95 in g_object_dispatch_properties_changed (object=0x2335700, n_pspecs=4294967295, pspecs=0x0) at /build/buildd/glib2.0-2.33.6/./gobject/gobject.c:1041
No locals.
#13 0x00007f28ee5ae64b in g_object_notify_by_spec_internal (pspec=0x7f28dc003b70, object=0x2335700) at /build/buildd/glib2.0-2.33.6/./gobject/gobject.c:1135
        nqueue = 0x0
        notify_pspec = 0x7f28dc003b70
#14 g_object_notify (object=0x2335700, property_name=property_name@entry=0x7f28ef8cf103 "is-blacklisted") at /build/buildd/glib2.0-2.33.6/./gobject/gobject.c:1177
        pspec = 0x7f28dc003b70
        __PRETTY_FUNCTION__ = "g_object_notify"
#15 0x00007f28ef8bbe48 in unity_music_player_set_is_blacklisted (self=<optimized out>, value=value@entry=1) at unity-sound-menu.c:1077
        _tmp0_ = 1
        __PRETTY_FUNCTION__ = "unity_music_player_set_is_blacklisted"
#16 0x0000000000411554 in unity_webapps_music_player_context_free (music_player_context=0x22ffad0) at unity-webapps-music-player-context.c:593
No locals.
#17 0x0000000000408d50 in unity_webapps_context_daemon_free (daemon=0x21ed170) at unity-webapps-context-daemon.c:1172
No locals.
#18 0x0000000000408db6 in on_handle_shutdown (context=<optimized out>, invocation=<optimized out>, user_data=0x21ed170) at unity-webapps-context-daemon.c:860
        context_daemon = 0x21ed170
#19 0x00007f28e9ec4bb8 in ffi_call_unix64 () at ../src/x86/unix64.S:75
No locals.
#20 0x00007f28e9ec45c0 in ffi_call (cif=cif@entry=0x7fff29628b70, fn=fn@entry=0x408d90 <on_handle_shutdown>, rvalue=0x7fff29628ad0, avalue=avalue@entry=0x7fff29628a70) at ../src/x86/ffi64.c:492
        classes = {X86_64_INTEGER_CLASS, X86_64_NO_CLASS, 694323952, 32767}
        stack = 0x7fff296288c0 " \211b)\377\177"
        argp = 0x7fff29628970 "\n"
        arg_types = <optimized out>
        gprcount = 3
        ssecount = <optimized out>
        ngpr = 1
        nsse = 0
        i = <optimized out>
        avn = <optimized out>
        ret_in_memory = <optimized out>
        reg_args = 0x7fff296288c0
#21 0x00007f28ee5a89bb in g_cclosure_marshal_generic (closure=0x2369da0, return_gvalue=0x7fff29628d10, n_param_values=<optimized out>, param_values=<optimized out>, invocation_hint=<optimized out>, marshal_data=0x408d90) at /build/buildd/glib2.0-2.33.6/./gobject/gclosure.c:1454
        rtype = <optimized out>
        rvalue = 0x7fff29628ad0
        n_args = 3
        atypes = 0x7fff29628aa0
        args = 0x7fff29628a70
        i = <optimized out>
        cif = {abi = FFI_UNIX64, nargs = 3, arg_types = 0x7fff29628aa0, rtype = 0x7f28e9ec4ee0, bytes = 0, flags = 10}
        cc = 0x2369da0
        enum_tmpval = 0x7fff29628af0
        tmpval_used = 0
#22 0x00007f28ee5a8050 in g_closure_invoke (closure=0x2369da0, return_value=0x7fff29628d10, n_param_values=2, param_values=0x23a8490, invocation_hint=0x7fff29628d60) at /build/buildd/glib2.0-2.33.6/./gobject/gclosure.c:777
        marshal = 0x4072e0 <g_cclosure_marshal_generic@plt>
        marshal_data = 0x0
        in_marshal = 0
        real_closure = 0x2369d80
        __PRETTY_FUNCTION__ = "g_closure_invoke"
#23 0x00007f28ee5b9d30 in signal_emit_unlocked_R (node=node@entry=0x2354050, detail=detail@entry=0, instance=instance@entry=0x22dbc40, emission_return=emission_return@entry=0x7fff29628e90, instance_and_params=instance_and_params@entry=0x23a8490) at /build/buildd/glib2.0-2.33.6/./gobject/gsignal.c:3551
        tmp = <optimized out>
        handler = 0x2235b90
        accumulator = 0x23540e0
        emission = {next = 0x0, instance = 0x22dbc40, ihint = {signal_id = 298, detail = 0, run_type = G_SIGNAL_RUN_FIRST}, state = EMISSION_RUN, chain_type = 4}
        class_closure = 0x2354000
        hlist = 0x2235b90
        handler_list = 0x2235b90
        return_accu = 0x7fff29628d10
        accu = {g_type = 20, 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 = 298
        max_sequential_handler_number = 313
        return_value_altered = 0
#24 0x00007f28ee5c10f9 in g_signal_emitv (instance_and_params=instance_and_params@entry=0x23a8490, signal_id=signal_id@entry=298, detail=detail@entry=0, return_value=return_value@entry=0x7fff29628e90) at /build/buildd/glib2.0-2.33.6/./gobject/gsignal.c:3041
        instance = 0x22dbc40
        node = 0x2354050
        param_values = 0x23a84a8
        i = <optimized out>
        __PRETTY_FUNCTION__ = "g_signal_emitv"
#25 0x0000000000414c00 in _unity_webapps_gen_context_skeleton_handle_method_call (connection=<optimized out>, sender=<optimized out>, object_path=<optimized out>, interface_name=0x7f28dc002f80 "com.canonical.Unity.Webapps.Context", method_name=0x7f28dc00bcf0 "Shutdown", parameters=<optimized out>, invocation=0x23300c0, user_data=0x22dbc40) at ../unity-webapps-gen-context.c:6707
        skeleton = 0x22dbc40
        info = 0x4232a0
        iter = {x = {139813265094960, 0, 0, 0, 139809775419632, 1, 139813466456080, 3579507750, 40, 240, 0, 36551744, 0, 139813771698689, 139813466455280, 139813774429224}}
        child = 0x0
        paramv = 0x23a8490
        num_params = <optimized out>
        num_extra = <optimized out>
        n = 2
        signal_id = 298
        return_value = {g_type = 20, 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}}}
#26 0x00007f28eeae6016 in g_dbus_interface_method_dispatch_helper (invocation=0x23300c0, method_call_func=0x414a70 <_unity_webapps_gen_context_skeleton_handle_method_call>, interface=<optimized out>) at /build/buildd/glib2.0-2.33.6/./gio/gdbusinterfaceskeleton.c:615
        has_handlers = <optimized out>
        emit_authorized_signal = <optimized out>
        flags = <optimized out>
        run_in_thread = <optimized out>
        object = 0x0
        has_default_class_handler = <optimized out>
#27 skeleton_intercept_handle_method_call (connection=<optimized out>, sender=<optimized out>, object_path=<optimized out>, interface_name=<optimized out>, method_name=<optimized out>, parameters=<optimized out>, invocation=0x23300c0, user_data=0x22dbc40) at /build/buildd/glib2.0-2.33.6/./gio/gdbusinterfaceskeleton.c:655
        interface = <optimized out>
#28 0x00007f28eeacdaa2 in call_in_idle_cb (user_data=<optimized out>) at /build/buildd/glib2.0-2.33.6/./gio/gdbusconnection.c:4737
        invocation = 0x23300c0
        vtable = <optimized out>
        registration_id = <optimized out>
        subtree_registration_id = <optimized out>
        __PRETTY_FUNCTION__ = "call_in_idle_cb"
#29 0x00007f28ee2e9c65 in g_main_dispatch (context=0x21ed460) at /build/buildd/glib2.0-2.33.6/./glib/gmain.c:2691
        dispatch = 0x7f28ee2e70e0 <g_idle_dispatch>
        was_in_call = 0
        user_data = 0x23300c0
        callback = 0x7f28eeacd960 <call_in_idle_cb>
        cb_funcs = 0x7f28ee5969a0
        cb_data = 0x7f28dc0056b0
        current_source_link = {data = 0x7f28dc005640, next = 0x0}
        need_destroy = <optimized out>
        source = 0x7f28dc005640
        current = 0x21f3430
        i = <optimized out>
#30 g_main_context_dispatch (context=context@entry=0x21ed460) at /build/buildd/glib2.0-2.33.6/./glib/gmain.c:3195
No locals.
#31 0x00007f28ee2e9f98 in g_main_context_iterate (context=0x21ed460, block=block@entry=1, dispatch=dispatch@entry=1, self=<error reading variable: Unhandled dwarf expression opcode 0xfa>) at /build/buildd/glib2.0-2.33.6/./glib/gmain.c:3266
        max_priority = 2147483647
        timeout = 15082
        some_ready = 1
        nfds = <optimized out>
        allocated_nfds = <optimized out>
        fds = 0x223b060
#32 0x00007f28ee2ea392 in g_main_loop_run (loop=0x2302630) at /build/buildd/glib2.0-2.33.6/./glib/gmain.c:3460
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#33 0x0000000000407c8b in main (argc=5, argv=0x7fff29629258) at unity-webapps-context-daemon.c:334
        name = 0x7fff29629a22 "YouTube"
        domain = 0x7fff29629a2a "www.youtube.com"
        icon_url = 0x7fff29629a3a "icon://youtube"
        mime_types = 0x7fff29629a49 "[Invalid UTF-8]"