.
Thread 3 (Thread 0x7fe978f7f700 (LWP 1543)):
#0  0x00007fe980872773 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  0x00007fe9812d2078 in g_main_context_poll (n_fds=1, fds=0x21457d0, timeout=-1, context=0x2145390, priority=<optimized out>) at /build/buildd/glib2.0-2.29.90/./glib/gmain.c:3402
        poll_func = 0x7fe9812e0620 <g_poll>
#2  g_main_context_iterate (context=0x2145390, block=<optimized out>, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.29.90/./glib/gmain.c:3084
        max_priority = 2147483647
        timeout = -1
        some_ready = <optimized out>
        nfds = 1
        allocated_nfds = <optimized out>
        fds = 0x21457d0
#3  0x00007fe9812d28a2 in g_main_loop_run (loop=0x2145310) at /build/buildd/glib2.0-2.29.90/./glib/gmain.c:3297
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#4  0x00007fe9795adc7b in dconf_context_thread (data=<optimized out>) at dconfcontext.c:11
        context = 0x2145390
        loop = <optimized out>
        __PRETTY_FUNCTION__ = "dconf_context_thread"
#5  0x00007fe9812f7626 in g_thread_create_proxy (data=0x2145340) at /build/buildd/glib2.0-2.29.90/./glib/gthread.c:1962
        thread = 0x2145340
        __PRETTY_FUNCTION__ = "g_thread_create_proxy"
#6  0x00007fe982928edc in start_thread (arg=0x7fe978f7f700) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7fe978f7f700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 1628155303088277555, 140735323369296, 140640733624768, 0, 3, -1636302614882760653, -1636113184341702605}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        robust = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#7  0x00007fe98087e89d 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 0x7fe973fff700 (LWP 1544)):
#0  0x00007fe980872773 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  0x00007fe9812d2078 in g_main_context_poll (n_fds=3, fds=0x2155110, timeout=-1, context=0x21530d0, priority=<optimized out>) at /build/buildd/glib2.0-2.29.90/./glib/gmain.c:3402
        poll_func = 0x7fe9812e0620 <g_poll>
#2  g_main_context_iterate (context=0x21530d0, block=<optimized out>, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.29.90/./glib/gmain.c:3084
        max_priority = 2147483647
        timeout = -1
        some_ready = <optimized out>
        nfds = 3
        allocated_nfds = <optimized out>
        fds = 0x2155110
#3  0x00007fe9812d28a2 in g_main_loop_run (loop=0x2153080) at /build/buildd/glib2.0-2.29.90/./glib/gmain.c:3297
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#4  0x00007fe981b5a7b6 in gdbus_shared_thread_func (user_data=0x21530a0) at /build/buildd/glib2.0-2.29.90/./gio/gdbusprivate.c:276
        data = 0x21530a0
#5  0x00007fe9812f7626 in g_thread_create_proxy (data=0x21531c0) at /build/buildd/glib2.0-2.29.90/./glib/gthread.c:1962
        thread = 0x21531c0
        __PRETTY_FUNCTION__ = "g_thread_create_proxy"
#6  0x00007fe982928edc in start_thread (arg=0x7fe973fff700) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7fe973fff700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 1628155303088277555, 140640733620400, 140640650262976, 0, 3, -1636291688485959629, -1636113184341702605}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        robust = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#7  0x00007fe98087e89d 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 0x7fe983195940 (LWP 1541)):
#0  0x00007fe9827167a0 in update_clock (data=0x216b840) at gnome-wall-clock.c:167
        self = 0x216b840
        clock_format = <optimized out>
        format_string = <optimized out>
        show_date = <optimized out>
        show_seconds = <optimized out>
        source = <optimized out>
        now = <optimized out>
        expiry = <optimized out>
#1  0x00007fe9827176d2 in g_datetime_source_dispatch (source=<optimized out>, callback=<optimized out>, user_data=<optimized out>) at gnome-datetime-source.c:142
        datetime_source = <optimized out>
#2  0x00007fe9812d1b6d in g_main_dispatch (context=0x20798e0) at /build/buildd/glib2.0-2.29.90/./glib/gmain.c:2441
        dispatch = 0x7fe9827176c0 <g_datetime_source_dispatch>
        was_in_call = 0
        user_data = 0x216b840
        callback = 0x7fe982716770 <update_clock>
        cb_funcs = 0x7fe981581670
        cb_data = 0x21a5590
        current_source_link = {data = 0x21eda50, next = 0x0}
        need_destroy = <optimized out>
        source = 0x21eda50
        current = 0x2164530
        i = <optimized out>
#3  g_main_context_dispatch (context=0x20798e0) at /build/buildd/glib2.0-2.29.90/./glib/gmain.c:3011
No locals.
#4  0x00007fe9812d2368 in g_main_context_iterate (context=0x20798e0, block=<optimized out>, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.29.90/./glib/gmain.c:3089
        max_priority = 2147483647
        timeout = 16136
        some_ready = 1
        nfds = 8
        allocated_nfds = <optimized out>
        fds = <optimized out>
#5  0x00007fe9812d28a2 in g_main_loop_run (loop=0x7fe974008ca0) at /build/buildd/glib2.0-2.29.90/./glib/gmain.c:3297
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#6  0x00007fe9821d110d in gtk_main () at /build/buildd/gtk+3.0-3.1.18/./gtk/gtkmain.c:1367
        loop = 0x7fe974008ca0
#7  0x00000000004093ca in main (argc=1, argv=0x7fff7ef4fd08) at gnome-screensaver.c:105
        monitor = 0x2140c00
        error = 0x0
        show_version = 0
        no_daemon = 1
        debug = 0
        entries = {{long_name = 0x4175af "version", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_NONE, arg_data = 0x61fc20, description = 0x4175b7 "Version of this application", arg_description = 0x0}, {long_name = 0x4175d3 "no-daemon", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_NONE, arg_data = 0x61fba0, description = 0x4175dd "Don't become a daemon", arg_description = 0x0}, {long_name = 0x4175f3 "debug", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_NONE, arg_data = 0x61fc24, description = 0x4175f9 "Enable debugging code", 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}}
        __FUNCTION__ = "main"