.
Thread 3 (Thread 0x7f8cba28f700 (LWP 1857)):
#0  0x00007f8cc0af6b03 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  0x00007f8cc1365ff6 in g_main_context_poll (n_fds=3, fds=0x7f8cac0010c0, timeout=-1, context=0x7f8cb400dc40, priority=<optimized out>) at /build/buildd/glib2.0-2.32.0/./glib/gmain.c:3417
        poll_func = 0x7f8cc1372f10 <g_poll>
#2  g_main_context_iterate (dispatch=1, block=<optimized out>, context=0x7f8cb400dc40, self=<optimized out>) at /build/buildd/glib2.0-2.32.0/./glib/gmain.c:3118
        timeout = -1
        some_ready = <optimized out>
        fds = 0x7f8cac0010c0
        max_priority = 2147483647
        nfds = 3
        allocated_nfds = <optimized out>
#3  g_main_context_iterate (context=0x7f8cb400dc40, block=<optimized out>, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.32.0/./glib/gmain.c:3060
        some_ready = -1409281856
#4  0x00007f8cc136645a in g_main_loop_run (loop=0x7f8cb400dbf0) at /build/buildd/glib2.0-2.32.0/./glib/gmain.c:3317
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#5  0x00007f8cc1e09326 in gdbus_shared_thread_func (user_data=<optimized out>) at /build/buildd/glib2.0-2.32.0/./gio/gdbusprivate.c:277
        data = 0x7f8cb400dc10
#6  0x00007f8cc13879b5 in g_thread_proxy (data=0x7f8cb400b540) at /build/buildd/glib2.0-2.32.0/./glib/gthread.c:801
        thread = 0x7f8cb400b540
#7  0x00007f8cc0dd4e9a in start_thread (arg=0x7f8cba28f700) at pthread_create.c:308
        __res = <optimized out>
        pd = 0x7f8cba28f700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 6180129304396987182, 140242405906736, 140242395396544, 0, 3, -6134660762394658002, -6134541090741519570}, 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"
#8  0x00007f8cc0b024bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#9  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 2 (Thread 0x7f8cbac96700 (LWP 1856)):
#0  0x00007f8cc0af6b03 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  0x00007f8cc1365ff6 in g_main_context_poll (n_fds=1, fds=0x7f8cb40010e0, timeout=-1, context=0x195f250, priority=<optimized out>) at /build/buildd/glib2.0-2.32.0/./glib/gmain.c:3417
        poll_func = 0x7f8cc1372f10 <g_poll>
#2  g_main_context_iterate (dispatch=1, block=<optimized out>, context=0x195f250, self=<optimized out>) at /build/buildd/glib2.0-2.32.0/./glib/gmain.c:3118
        timeout = -1
        some_ready = <optimized out>
        fds = 0x7f8cb40010e0
        max_priority = 2147483647
        nfds = 1
        allocated_nfds = <optimized out>
#3  g_main_context_iterate (context=0x195f250, block=<optimized out>, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.32.0/./glib/gmain.c:3060
        some_ready = -1275064096
#4  0x00007f8cc136645a in g_main_loop_run (loop=0x7f8cb40010c0) at /build/buildd/glib2.0-2.32.0/./glib/gmain.c:3317
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#5  0x00007f8cbb4ec98b in dconf_context_thread (data=<optimized out>) at dconfcontext.c:11
        context = 0x195f250
        loop = <optimized out>
        __PRETTY_FUNCTION__ = "dconf_context_thread"
#6  0x00007f8cc13879b5 in g_thread_proxy (data=0x1956a30) at /build/buildd/glib2.0-2.32.0/./glib/gthread.c:801
        thread = 0x1956a30
#7  0x00007f8cc0dd4e9a in start_thread (arg=0x7f8cbac96700) at pthread_create.c:308
        __res = <optimized out>
        pd = 0x7f8cbac96700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 6180129304396987182, 140733985810128, 140242405910976, 0, 3, -6134659940445291730, -6134541090741519570}, 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"
#8  0x00007f8cc0b024bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#9  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (Thread 0x7f8cc2fb1940 (LWP 1853)):
#0  g_logv (log_domain=0x7f8cc13a472e "GLib", log_level=<optimized out>, format=0x7f8cc13adb4a "%s: assertion `%s' failed", args1=0x7fff2f3b64c8) at /build/buildd/glib2.0-2.32.0/./glib/gmessages.c:765
        domain = 0x0
        data = <optimized out>
        depth = 0
        log_func = <optimized out>
        domain_fatal_mask = <optimized out>
        masquerade_fatal = <optimized out>
        test_level = <optimized out>
        was_fatal = 0
        was_recursion = 0
        i = <optimized out>
#1  0x00007f8cc136d172 in g_log (log_domain=<optimized out>, log_level=<optimized out>, format=<optimized out>) at /build/buildd/glib2.0-2.32.0/./glib/gmessages.c:792
        args = {{gp_offset = 24, fp_offset = 48, overflow_arg_area = 0x7fff2f3b65a0, reg_save_area = 0x7fff2f3b64e0}}
#2  0x00007f8cc1393c3e in g_variant_get_boolean (value=<optimized out>) at /build/buildd/glib2.0-2.32.0/./glib/gvariant.c:369
No locals.
#3  g_variant_get_boolean (value=0x7f8cac16a780) at /build/buildd/glib2.0-2.32.0/./glib/gvariant.c:365
        data = <optimized out>
#4  0x000000000040ac92 in ?? ()
No symbol table info available.
#5  0x00007f8cc1622c82 in g_closure_invoke (closure=0x1bae290, return_value=0x0, n_param_values=1, param_values=0x7fff2f3b67a0, invocation_hint=<optimized out>) at /build/buildd/glib2.0-2.32.0/./gobject/gclosure.c:777
        marshal = 0x405db0 <g_cclosure_marshal_VOID__VOID@plt>
        marshal_data = <optimized out>
        in_marshal = <optimized out>
        real_closure = 0x1bae270
        __PRETTY_FUNCTION__ = "g_closure_invoke"
#6  0x00007f8cc1633d51 in signal_emit_unlocked_R (node=<optimized out>, detail=0, instance=<optimized out>, emission_return=0x0, instance_and_params=0x7fff2f3b67a0) at /build/buildd/glib2.0-2.32.0/./gobject/gsignal.c:3547
        tmp = <optimized out>
        handler = 0x7f8cac165e60
        accumulator = 0x0
        emission = {next = 0x0, instance = 0x1c00250, ihint = {signal_id = 9, detail = 0, run_type = G_SIGNAL_RUN_FIRST}, state = EMISSION_RUN, chain_type = 4}
        class_closure = 0x1966620
        hlist = 0x1b4d828
        handler_list = 0x7f8cac1662c0
        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 = 9
        max_sequential_handler_number = 483
        return_value_altered = 1
#7  0x00007f8cc163c079 in g_signal_emit_valist (instance=0x1c00250, signal_id=<optimized out>, detail=0, var_args=<optimized out>) at /build/buildd/glib2.0-2.32.0/./gobject/gsignal.c:3296
        instance_and_params = 0x7fff2f3b67a0
        signal_return_type = 4
        param_values = 0x7fff2f3b67b8
        node = 0x1966690
        i = <optimized out>
        n_params = 0
        __PRETTY_FUNCTION__ = "g_signal_emit_valist"
#8  0x00007f8cc163c222 in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>) at /build/buildd/glib2.0-2.32.0/./gobject/gsignal.c:3352
        var_args = {{gp_offset = 24, fp_offset = 48, overflow_arg_area = 0x7fff2f3b6aa0, reg_save_area = 0x7fff2f3b69e0}}
#9  0x00007f8cc27deeae in gtk_widget_dispose (object=0x1c00250) at /build/buildd/gtk+3.0-3.4.0/./gtk/gtkwidget.c:10338
        widget = 0x1c00250
        priv = 0x1c00290
#10 0x00007f8cc1628fe0 in g_object_run_dispose (object=0x1c00250) at /build/buildd/glib2.0-2.32.0/./gobject/gobject.c:1061
        __PRETTY_FUNCTION__ = "g_object_run_dispose"
#11 0x000000000040807a in ?? ()
No symbol table info available.
#12 0x00007f8cc13668db in g_timeout_dispatch (source=<optimized out>, callback=<optimized out>, user_data=<optimized out>) at /build/buildd/glib2.0-2.32.0/./glib/gmain.c:3859
        timeout_source = 0x1badc10
        again = <optimized out>
#13 0x00007f8cc1365c9a in g_main_dispatch (context=0x195a210) at /build/buildd/glib2.0-2.32.0/./glib/gmain.c:2515
        dispatch = 0x7f8cc13668c0 <g_timeout_dispatch>
        was_in_call = 0
        user_data = 0x1c00250
        callback = 0x408050
        cb_funcs = 0x7f8cc16119a0
        cb_data = 0x1b949a0
        current_source_link = {data = 0x1badc10, next = 0x0}
        need_destroy = <optimized out>
        source = 0x1badc10
        current = 0x1abcd90
        i = <optimized out>
#14 g_main_context_dispatch (context=0x195a210) at /build/buildd/glib2.0-2.32.0/./glib/gmain.c:3052
No locals.
#15 0x00007f8cc1366060 in g_main_context_iterate (dispatch=1, block=<optimized out>, context=0x195a210, self=<optimized out>) at /build/buildd/glib2.0-2.32.0/./glib/gmain.c:3123
        timeout = 366
        some_ready = 1
        fds = <optimized out>
        max_priority = 2147483647
        nfds = 5
        allocated_nfds = <optimized out>
#16 g_main_context_iterate (context=0x195a210, block=<optimized out>, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.32.0/./glib/gmain.c:3060
        some_ready = 1
#17 0x00007f8cc136645a in g_main_loop_run (loop=0x1ae80d0) at /build/buildd/glib2.0-2.32.0/./glib/gmain.c:3317
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#18 0x00007f8cc26a8f2d in gtk_main () at /build/buildd/gtk+3.0-3.4.0/./gtk/gtkmain.c:1165
        loop = 0x1ae80d0
#19 0x000000000040638a in ?? ()
No symbol table info available.
#20 0x00007f8cc0a3176d in __libc_start_main (main=0x406300, argc=1, ubp_av=0x7fff2f3b6d18, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff2f3b6d08) at libc-start.c:226
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 6180129304396987182, 4219852, 140733985811728, 0, 0, -6180516844050285778, -6134540830653777106}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x40cab0, 0x7fff2f3b6d18}, data = {prev = 0x0, cleanup = 0x0, canceltype = 4246192}}}
        not_first_call = <optimized out>
#21 0x00000000004063f5 in ?? ()
No symbol table info available.
#22 0x00007fff2f3b6d08 in ?? ()
No symbol table info available.
#23 0x000000000000001c in ?? ()
No symbol table info available.
#24 0x0000000000000001 in ?? ()
No symbol table info available.
#25 0x00007fff2f3b79e0 in ?? ()
No symbol table info available.
#26 0x0000000000000000 in ?? ()
No symbol table info available.