.
Thread 4 (Thread 0x7f6053d92700 (LWP 24173)):
#0  0x00007f605ce9841f in g_object_dispatch_properties_changed (object=0x56380a9646b0 [GTask], n_pspecs=<optimized out>, pspecs=<optimized out>) at ../../../../gobject/gobject.c:1082
        i = <optimized out>
#1  0x00007f605ce9a7f9 in g_object_notify_by_spec_internal (pspec=0x56380a946ca0 [GParamBoolean], object=0x56380a9646b0 [GTask]) at ../../../../gobject/gobject.c:1175
        nqueue = <optimized out>
        notify_pspec = 0x56380a946ca0 [GParamBoolean]
        pspec = 0x56380a946ca0 [GParamBoolean]
        __func__ = "g_object_notify"
#2  0x00007f605ce9a7f9 in g_object_notify (object=object@entry=0x56380a9646b0 [GTask], property_name=property_name@entry=0x7f605d202c12 "completed") at ../../../../gobject/gobject.c:1223
        pspec = 0x56380a946ca0 [GParamBoolean]
        __func__ = "g_object_notify"
#3  0x00007f605d1650a9 in g_task_return_now (task=0x56380a9646b0 [GTask]) at ../../../../gio/gtask.c:1154
#4  0x00007f605d1650c9 in complete_in_idle_cb (task=0x56380a9646b0) at ../../../../gio/gtask.c:1162
#5  0x00007f605cbba0f5 in g_main_dispatch (context=0x56380a961470) at ../../../../glib/gmain.c:3177
        dispatch = 0x7f605cbb6a80 <g_idle_dispatch>
        prev_source = 0x0
        was_in_call = 0
        user_data = 0x56380a9646b0
        callback = 0x7f605d1650c0 <complete_in_idle_cb>
        cb_funcs = 0x7f605ce82280 <g_source_callback_funcs>
        cb_data = 0x56380b828050
        need_destroy = <optimized out>
        source = 0x7f604400a3c0
        current = 0x56380a95a5b0
        i = 0
#6  0x00007f605cbba0f5 in g_main_context_dispatch (context=context@entry=0x56380a961470) at ../../../../glib/gmain.c:3830
#7  0x00007f605cbba4c0 in g_main_context_iterate (context=0x56380a961470, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3903
        max_priority = 0
        timeout = 0
        some_ready = 1
        nfds = <optimized out>
        allocated_nfds = 2
        fds = 0x56380a963a00
#8  0x00007f605cbba7d2 in g_main_loop_run (loop=0x56380a9615b0) at ../../../../glib/gmain.c:4099
        __func__ = "g_main_loop_run"
#9  0x00007f605d1a6e76 in gdbus_shared_thread_func (user_data=0x56380a961440) at ../../../../gio/gdbusprivate.c:275
        data = 0x56380a961440
#10 0x00007f605cbe1e05 in g_thread_proxy (data=0x56380a94b8f0) at ../../../../glib/gthread.c:784
        thread = 0x56380a94b8f0
#11 0x00007f605c9566db in start_thread (arg=0x7f6053d92700) at pthread_create.c:463
        pd = 0x7f6053d92700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140051700328192, 745721812496322894, 140051700325504, 0, 94798695676144, 140731598841696, -821359668862742194, -821362521899364018}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
#12 0x00007f605c67f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
.
Thread 3 (Thread 0x7f605195d700 (LWP 24176)):
#0  0x00007f605c672bf9 in __GI___poll (fds=0x56380aa5ea30, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
        resultvar = 18446744073709551100
        sc_cancel_oldtype = 0
#1  0x00007f605cbba439 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x56380aa5ea30, timeout=<optimized out>, context=0x56380aaa87d0) at ../../../../glib/gmain.c:4204
        ret = <optimized out>
        errsv = <optimized out>
        poll_func = 0x7f605cbc9c80 <g_poll>
        max_priority = 2147483647
        timeout = -1
        some_ready = <optimized out>
        nfds = 1
        allocated_nfds = 1
        fds = 0x56380aa5ea30
#2  0x00007f605cbba439 in g_main_context_iterate (context=context@entry=0x56380aaa87d0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3898
        max_priority = 2147483647
        timeout = -1
        some_ready = <optimized out>
        nfds = 1
        allocated_nfds = 1
        fds = 0x56380aa5ea30
#3  0x00007f605cbba54c in g_main_context_iteration (context=0x56380aaa87d0, may_block=1) at ../../../../glib/gmain.c:3964
        retval = <optimized out>
#4  0x00007f605196536d in  () at /usr/lib/x86_64-linux-gnu/gio/modules/libdconfsettings.so
#5  0x00007f605cbe1e05 in g_thread_proxy (data=0x56380aa22540) at ../../../../glib/gthread.c:784
        thread = 0x56380aa22540
#6  0x00007f605c9566db in start_thread (arg=0x7f605195d700) at pthread_create.c:463
        pd = 0x7f605195d700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140051662362368, 745721812496322894, 140051662359680, 0, 94798696555840, 140731598839264, -821355930630581938, -821362521899364018}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
#7  0x00007f605c67f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
.
Thread 2 (Thread 0x7f6054593700 (LWP 24172)):
#0  0x00007f605c672bf9 in __GI___poll (fds=0x56380a94f3f0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
        resultvar = 18446744073709551100
        sc_cancel_oldtype = 0
#1  0x00007f605cbba439 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x56380a94f3f0, timeout=<optimized out>, context=0x56380a94f130) at ../../../../glib/gmain.c:4204
        ret = <optimized out>
        errsv = <optimized out>
        poll_func = 0x7f605cbc9c80 <g_poll>
        max_priority = 2147483647
        timeout = -1
        some_ready = <optimized out>
        nfds = 1
        allocated_nfds = 1
        fds = 0x56380a94f3f0
#2  0x00007f605cbba439 in g_main_context_iterate (context=context@entry=0x56380a94f130, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3898
        max_priority = 2147483647
        timeout = -1
        some_ready = <optimized out>
        nfds = 1
        allocated_nfds = 1
        fds = 0x56380a94f3f0
#3  0x00007f605cbba54c in g_main_context_iteration (context=0x56380a94f130, may_block=may_block@entry=1) at ../../../../glib/gmain.c:3964
        retval = <optimized out>
#4  0x00007f605cbba591 in glib_worker_main (data=<optimized out>) at ../../../../glib/gmain.c:5773
#5  0x00007f605cbe1e05 in g_thread_proxy (data=0x56380a94b850) at ../../../../glib/gthread.c:784
        thread = 0x56380a94b850
#6  0x00007f605c9566db in start_thread (arg=0x7f6054593700) at pthread_create.c:463
        pd = 0x7f6054593700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140051708720896, 745721812496322894, 140051708718208, 0, 94798695675984, 140731598841312, -821345374674710194, -821362521899364018}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
#7  0x00007f605c67f88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
.
Thread 1 (Thread 0x7f605e494a80 (LWP 24171)):
#0  0x00007f605ceb9c0f in g_type_check_instance_is_fundamentally_a (type_instance=type_instance@entry=0x56380b81db00, fundamental_type=fundamental_type@entry=80) at ../../../../gobject/gtype.c:4025
#1  0x00007f605ce98ce5 in g_object_unref (_object=0x56380b81db00) at ../../../../gobject/gobject.c:3237
        _g_boolean_var_ = <optimized out>
        object = 0x56380b81db00
#2  0x00007f605d8e99bd in gtk_css_value_image_free (value=0x56380b828860) at ../../../../gtk/gtkcssimagevalue.c:32
#3  0x00007f605d8ffbe5 in gtk_css_static_style_dispose (object=0x56380ac1fce0 [GtkCssStaticStyle]) at ../../../../gtk/gtkcssstaticstyle.c:81
        style = 0x56380ac1fce0 [GtkCssStaticStyle]
        i = <optimized out>
#4  0x00007f605ce98e03 in g_object_unref (_object=0x56380ac1fce0) at ../../../../gobject/gobject.c:3303
        weak_locations = 0x0
        object = 0x56380ac1fce0 [GtkCssStaticStyle]
        old_ref = <optimized out>
        object = 0x56380ac1fce0 [GtkCssStaticStyle]
#5  0x00007f605d8ec0a2 in gtk_css_node_finalize (object=0x56380aa49d90 [GtkCssWidgetNode]) at ../../../../gtk/gtkcssnode.c:251
        cssnode = 0x56380aa49d90 [GtkCssWidgetNode]
#6  0x00007f605ce98e72 in g_object_unref (_object=0x56380aa49d90) at ../../../../gobject/gobject.c:3340
        weak_locations = <optimized out>
        object = 0x56380aa49d90 [GtkCssWidgetNode]
        old_ref = 1
        object = 0x56380aa49d90 [GtkCssWidgetNode]
#7  0x00007f605da49cd7 in gtk_style_context_finalize (object=0x7f604401d280 [GtkStyleContext]) at ../../../../gtk/gtkstylecontext.c:387
        context = 0x7f604401d280 [GtkStyleContext]
        priv = 0x7f604401d230
#8  0x00007f605ce98e72 in g_object_unref (_object=0x7f604401d280) at ../../../../gobject/gobject.c:3340
        weak_locations = <optimized out>
        object = 0x7f604401d280 [GtkStyleContext]
        old_ref = 1
        object = 0x7f604401d280 [GtkStyleContext]
#9  0x00007f605daf6193 in gtk_widget_finalize (object=0x56380aab86f0 [GtkInvisible]) at ../../../../gtk/gtkwidget.c:12313
        _pp = {in = 0x56380aab8648 "", out = 0x56380aab8648}
        _p = <optimized out>
        widget = 0x56380aab86f0 [GtkInvisible]
        priv = 0x56380aab8600
        l = <optimized out>
        __func__ = "gtk_widget_finalize"
#10 0x00007f605ce98e72 in g_object_unref (_object=0x56380aab86f0) at ../../../../gobject/gobject.c:3340
        weak_locations = <optimized out>
        object = 0x56380aab86f0 [GtkInvisible]
        old_ref = 1
        object = 0x56380aab86f0 [GtkInvisible]
#11 0x00007f605dae4a62 in gtk_widget_event_internal (widget=widget@entry=0x56380aab86f0 [GtkInvisible], event=event@entry=0x56380a9595a0) at ../../../../gtk/gtkwidget.c:7753
        return_val = 1
        handled = 1
        __func__ = "gtk_widget_event_internal"
#12 0x00007f605dae6b7a in gtk_widget_event (widget=widget@entry=0x56380aab86f0 [GtkInvisible], event=event@entry=0x56380a9595a0) at ../../../../gtk/gtkwidget.c:7314
        __func__ = "gtk_widget_event"
#13 0x00007f605d99c22e in gtk_main_do_event (event=<optimized out>) at ../../../../gtk/gtkmain.c:1855
        window_group = 0x7f6044012e40 [GtkWindowGroup]
        device = 0x0
        tmp_list = <optimized out>
        event_widget = 0x56380aab86f0 [GtkInvisible]
        event = 0x56380a9595a0
#14 0x00007f605d4ad765 in _gdk_event_emit (event=event@entry=0x56380a9595a0) at ../../../../gdk/gdkevents.c:73
#15 0x00007f605d4ddf82 in gdk_event_source_dispatch (source=source@entry=0x56380a941f20, callback=<optimized out>, user_data=<optimized out>) at ../../../../../gdk/x11/gdkeventsource.c:367
        display = <optimized out>
        event = 0x56380a9595a0
#16 0x00007f605cbba287 in g_main_dispatch (context=0x56380a956d80) at ../../../../glib/gmain.c:3177
        dispatch = 0x7f605d4ddf60 <gdk_event_source_dispatch>
        prev_source = 0x0
        was_in_call = 0
        user_data = 0x0
        callback = 0x0
        cb_funcs = <optimized out>
        cb_data = 0x0
        need_destroy = <optimized out>
        source = 0x56380a941f20
        current = 0x56380a95a190
        i = 0
#17 0x00007f605cbba287 in g_main_context_dispatch (context=context@entry=0x56380a956d80) at ../../../../glib/gmain.c:3830
#18 0x00007f605cbba4c0 in g_main_context_iterate (context=context@entry=0x56380a956d80, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3903
        max_priority = 2147483647
        timeout = 989
        some_ready = 1
        nfds = <optimized out>
        allocated_nfds = 3
        fds = 0x56380aa78e50
#19 0x00007f605cbba54c in g_main_context_iteration (context=context@entry=0x56380a956d80, may_block=may_block@entry=1) at ../../../../glib/gmain.c:3964
        retval = <optimized out>
#20 0x00007f605d17ad2d in g_application_run (application=0x56380a94a1a0 [GtkApplication], argc=<optimized out>, argv=<optimized out>) at ../../../../gio/gapplication.c:2470
        arguments = 0x56380aa929f0
        status = 0
        context = 0x56380a956d80
        acquired_context = <optimized out>
        __func__ = "g_application_run"
#21 0x0000563808e7f664 in  ()
#22 0x00007f605c57fb97 in __libc_start_main (main=0x563808e7f3c0, argc=1, argv=0x7ffea0f52b18, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffea0f52b08) at ../csu/libc-start.c:310
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -6473564071970303666, 94798667577120, 140731598842640, 0, 0, -746445371229957810, -821363058650345138}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x7f605e2cc733 <_dl_init+259>, 0x7f605e2b9f18}, data = {prev = 0x0, cleanup = 0x0, canceltype = 1579992883}}}
        not_first_call = <optimized out>
#23 0x0000563808e7f74a in  ()