.
Thread 3 (Thread 0x7f606a0cd700 (LWP 12384)):
#0  0x00007f607336ab03 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  0x00007f60749e0b04 in g_main_context_poll (n_fds=3, fds=0x7f605c0010c0, timeout=-1, context=0x7f606400cbf0, priority=<optimized out>) at /build/buildd/glib2.0-2.33.1/./glib/gmain.c:3440
        poll_func = 0x7f60749ee990 <g_poll>
#2  g_main_context_iterate (context=0x7f606400cbf0, block=block@entry=1, dispatch=dispatch@entry=1, self=<error reading variable: Unhandled dwarf expression opcode 0xfa>) at /build/buildd/glib2.0-2.33.1/./glib/gmain.c:3141
        max_priority = 2147483647
        timeout = -1
        some_ready = <optimized out>
        nfds = 3
        allocated_nfds = <optimized out>
        fds = 0x7f605c0010c0
#3  0x00007f60749e0f62 in g_main_loop_run (loop=0x7f606400cb10) at /build/buildd/glib2.0-2.33.1/./glib/gmain.c:3340
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#4  0x00007f6071d2a6f6 in gdbus_shared_thread_func (user_data=0x7f606400cbc0) at /build/buildd/glib2.0-2.33.1/./gio/gdbusprivate.c:277
        data = 0x7f606400cbc0
#5  0x00007f6074a03765 in g_thread_proxy (data=0x7f606400a540) at /build/buildd/glib2.0-2.33.1/./glib/gthread.c:801
        thread = 0x7f606400a540
#6  0x00007f6074317e9a in start_thread (arg=0x7f606a0cd700) at pthread_create.c:308
        __res = <optimized out>
        pd = 0x7f606a0cd700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -1552810015903133610, 140052087916848, 140052072815040, 0, 3, 1491707000722870358, 1491720509932228694}, 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  0x00007f60733764bd 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 0x7f606af35700 (LWP 12383)):
#0  0x00007f607336ab03 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  0x00007f60749e0b04 in g_main_context_poll (n_fds=1, fds=0x7f60640010e0, timeout=-1, context=0xa585f0, priority=<optimized out>) at /build/buildd/glib2.0-2.33.1/./glib/gmain.c:3440
        poll_func = 0x7f60749ee990 <g_poll>
#2  g_main_context_iterate (context=0xa585f0, block=block@entry=1, dispatch=dispatch@entry=1, self=<error reading variable: Unhandled dwarf expression opcode 0xfa>) at /build/buildd/glib2.0-2.33.1/./glib/gmain.c:3141
        max_priority = 2147483647
        timeout = -1
        some_ready = <optimized out>
        nfds = 1
        allocated_nfds = <optimized out>
        fds = 0x7f60640010e0
#3  0x00007f60749e0f62 in g_main_loop_run (loop=0x7f60640010c0) at /build/buildd/glib2.0-2.33.1/./glib/gmain.c:3340
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#4  0x00007f606af3aafb in dconf_context_thread (data=0xa585f0) at dconfcontext.c:11
        context = 0xa585f0
        loop = <optimized out>
        __PRETTY_FUNCTION__ = "dconf_context_thread"
#5  0x00007f6074a03765 in g_thread_proxy (data=0xa4cb70) at /build/buildd/glib2.0-2.33.1/./glib/gthread.c:801
        thread = 0xa4cb70
#6  0x00007f6074317e9a in start_thread (arg=0x7f606af35700) at pthread_create.c:308
        __res = <optimized out>
        pd = 0x7f606af35700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -1552810015903133610, 140736089324112, 140052087921088, 0, 3, 1491705647808172118, 1491720509932228694}, 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  0x00007f60733764bd 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 0x7f606c2bc940 (LWP 12342)):
#0  _gtk_widget_update_path (widget=0x9fdad0) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtkwidget.c:7986
No locals.
#1  reset_style_recurse (widget=0x9fdad0, data=0x0) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtkwidget.c:8523
No locals.
#2  0x00007f6076985eca in gtk_box_forall (container=<optimized out>, include_internals=<optimized out>, callback=0x7f6076b85930 <reset_style_recurse>, callback_data=0x0) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtkbox.c:1858
        box = <optimized out>
        priv = 0x9fdac0
        child = <optimized out>
        children = 0x0
#3  0x00007f6076b859f2 in gtk_widget_reset_style (widget=0xaf7020) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtkwidget.c:8547
No locals.
#4  0x00007f6076ad4488 in gtk_style_context_reset_widgets (screen=screen@entry=0xa42110) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtkstylecontext.c:1316
        list = 0xbe2e60
        toplevels = 0xc02d20
#5  0x00007f6076ad46bf in gtk_style_context_remove_provider_for_screen (screen=screen@entry=0xa42110, provider=0xa26280) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtkstylecontext.c:1397
        providers = 0xa84e00
        list = 0x7f6064001940
        __PRETTY_FUNCTION__ = "gtk_style_context_remove_provider_for_screen"
#6  0x00007f6076ac2ace in settings_update_provider (screen=0xa42110, old=old@entry=0xa73d28, new=0xc0bf40) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtksettings.c:2834
No locals.
#7  0x00007f6076ac4a4e in settings_update_theme (settings=0xa73cf0) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtksettings.c:2876
        priv = 0xa73d10
        provider = <optimized out>
        prefer_dark_theme = 0
        theme_name = 0xa499c0 "Xfce"
#8  0x00007f6076ac4ec5 in gtk_settings_notify (object=0xa73cf0, pspec=<optimized out>) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtksettings.c:1766
        settings = 0xa73cf0
        priv = 0xa73d10
        property_id = <optimized out>
#9  0x00007f6074c9e074 in g_closure_invoke (closure=0x9f9f10, return_value=0x0, n_param_values=2, param_values=0x7fffac9c7e40, invocation_hint=0x7fffac9c7de0) at /build/buildd/glib2.0-2.33.1/./gobject/gclosure.c:777
        marshal = 0x7f6074c9cc80 <g_type_class_meta_marshal>
        marshal_data = 0x40
        in_marshal = <optimized out>
        real_closure = 0x9f9ef0
        __PRETTY_FUNCTION__ = "g_closure_invoke"
#10 0x00007f6074caf683 in signal_emit_unlocked_R (node=node@entry=0x9fa800, detail=detail@entry=817, instance=instance@entry=0xa73cf0, emission_return=emission_return@entry=0x0, instance_and_params=instance_and_params@entry=0x7fffac9c7e40) at /build/buildd/glib2.0-2.33.1/./gobject/gsignal.c:3477
        accumulator = 0x0
        emission = {next = 0x0, instance = 0xa73cf0, ihint = {signal_id = 1, detail = 817, run_type = G_SIGNAL_RUN_FIRST}, state = EMISSION_RUN, chain_type = 10927104}
        class_closure = 0x9f9f10
        hlist = 0xa562a0
        handler_list = <optimized out>
        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 = 1025
        return_value_altered = <optimized out>
#11 0x00007f6074cb7fe1 in g_signal_emit_valist (instance=0xa73cf0, signal_id=<optimized out>, detail=817, var_args=var_args@entry=0x7fffac9c8098) at /build/buildd/glib2.0-2.33.1/./gobject/gsignal.c:3296
        instance_and_params = 0x7fffac9c7e40
        signal_return_type = 4
        param_values = 0x7fffac9c7e58
        node = 0x9fa800
        i = <optimized out>
        n_params = 1
        __PRETTY_FUNCTION__ = "g_signal_emit_valist"
#12 0x00007f6074cb8232 in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>) at /build/buildd/glib2.0-2.33.1/./gobject/gsignal.c:3352
        var_args = {{gp_offset = 32, fp_offset = 48, overflow_arg_area = 0x7fffac9c8170, reg_save_area = 0x7fffac9c80b0}}
#13 0x00007f6074ca2bc5 in g_object_dispatch_properties_changed (object=0xa73cf0, n_pspecs=0, pspecs=0x7f6076b85930) at /build/buildd/glib2.0-2.33.1/./gobject/gobject.c:1041
No locals.
#14 0x00007f6074ca467b in g_object_notify_by_spec_internal (pspec=0x7f6064005d10, object=0xa73cf0) at /build/buildd/glib2.0-2.33.1/./gobject/gobject.c:1133
        nqueue = 0x0
        notify_pspec = 0x7f6064005d10
#15 g_object_notify (object=object@entry=0xa73cf0, property_name=<optimized out>) at /build/buildd/glib2.0-2.33.1/./gobject/gobject.c:1175
        pspec = 0x7f6064005d10
        __PRETTY_FUNCTION__ = "g_object_notify"
#16 0x00007f6076ac82c3 in _gtk_settings_handle_event (event=<optimized out>) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtksettings.c:2528
        screen = 0xa42110
        settings = 0xa73cf0
        pspec = 0x7f6064005d10
        property_id = <optimized out>
#17 0x00007f6076a5096d in gtk_main_do_event (event=0xb7d8f0) at /build/buildd/gtk+3.0-3.4.2/./gtk/gtkmain.c:1498
        event_widget = <optimized out>
        grab_widget = 0x0
        topmost_widget = 0x0
        window_group = <optimized out>
        rewritten_event = 0x0
        device = <optimized out>
        tmp_list = <optimized out>
        __PRETTY_FUNCTION__ = "gtk_main_do_event"
#18 0x00007f60766a0e02 in gdk_event_source_dispatch (source=source@entry=0xa4d5b0, callback=<optimized out>, user_data=<optimized out>) at /build/buildd/gtk+3.0-3.4.2/./gdk/x11/gdkeventsource.c:358
        display = <optimized out>
        event = 0xb7d8f0
#19 0x00007f60749e0835 in g_main_dispatch (context=0x9fe2b0) at /build/buildd/glib2.0-2.33.1/./glib/gmain.c:2539
        dispatch = 0x7f60766a0de0 <gdk_event_source_dispatch>
        was_in_call = 0
        user_data = 0x0
        callback = 0
        cb_funcs = 0x0
        cb_data = 0x0
        current_source_link = {data = 0xa4d5b0, next = 0x0}
        need_destroy = <optimized out>
        source = 0xa4d5b0
        current = 0xbe5d90
        i = <optimized out>
#20 g_main_context_dispatch (context=context@entry=0x9fe2b0) at /build/buildd/glib2.0-2.33.1/./glib/gmain.c:3075
No locals.
#21 0x00007f60749e0b68 in g_main_context_iterate (context=0x9fe2b0, block=block@entry=1, dispatch=dispatch@entry=1, self=<error reading variable: Unhandled dwarf expression opcode 0xfa>) at /build/buildd/glib2.0-2.33.1/./glib/gmain.c:3146
        max_priority = 2147483647
        timeout = -1
        some_ready = 1
        nfds = <optimized out>
        allocated_nfds = <optimized out>
        fds = 0xc8b980
#22 0x00007f60749e0f62 in g_main_loop_run (loop=0xc84000) at /build/buildd/glib2.0-2.33.1/./glib/gmain.c:3340
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#23 0x00007f6076a4fc65 in gtk_main () at /build/buildd/gtk+3.0-3.4.2/./gtk/gtkmain.c:1165
        loop = 0xc84000
#24 0x0000000000418ae1 in main ()
No symbol table info available.