control: tag - unreproducible
Hello,
after getting no answers I've studied how to debug XFCE 4.
I'm adding new and more useful debug information to help fixing the
problem and also explain why you can't reproduce it.
Apparently the source of the bug is unallocated memory (a NULL pointer,
0x0..0 in gdb) and there are also signs of an incompatibility with the
signal management of a specific version of GLib 2:
> (xfce4-panel:1964): GLib-GObject-WARNING **:
> /build/glib2.0-B1uXKV/glib2.0-2.50.3/./gobject/gsignal.c:3492: signal
> name 'selection_changed' is invalid for instance '0x55b07a0221c0' of
> type 'GailMenuItem'
> (xfce4-panel:1964): libtasklist-CRITICAL **: tasklist-widget.c:1777
> (xfce_tasklist_window_removed): expression 'n == 5' failed.
> (xfce4-panel:1603): libtasklist-CRITICAL **: tasklist-widget.c:2681
> (xfce_tasklist_button_enter_notify_event): expression
> 'XFCE_IS_TASKLIST (child->tasklist)' failed.
> (xfce4-panel:1603): libtasklist-CRITICAL **: tasklist-widget.c:2805
> (xfce_tasklist_button_enter_notify_event_disconnected): expression
> 'WNCK_IS_WINDOW (child->window)' failed.
> (xfce4-panel:1603): libtasklist-CRITICAL **: tasklist-widget.c:1871
> (xfce_tasklist_update_icon_geometries): expression 'WNCK_IS_WINDOW
> (child->window)' failed.
> (xfce4-panel:1603): libtasklist-CRITICAL **: tasklist-widget.c:2883
> (xfce_tasklist_button_activate): expression 'WNCK_IS_WINDOW
> (child->window)' failed.
> (xfce4-panel:1603): GLib-GObject-WARNING **: instance with invalid
> (NULL) class pointer
> (xfce4-panel:1603): GLib-GObject-CRITICAL **:
> g_signal_handlers_disconnect_matched: assertion 'G_TYPE_CHECK_INSTANCE
> (instance)' failed
In my opinion the bug could be traced to a single value:
'tasklist-widget.c' is trying to access the wrong object of a collection
and this is caused by the incorrect handling of signals in 'gsignal.c',
that can be the root cause of the problem.
I've attached 2 log files, the 1st with PANEL_DEBUG=gdb and the 2nd with
PANEL_DEBUG=tasklist, so you have all debugging information plus the
correct library versions to reproduce it.
Regards,
Lorenzo
xfce4-panel(main): version 4.12.1 on gtk+ 2.24.31 (2.24.31), glib 2.50.3 (2.50.2)
xfce4-panel(main): running external plugins with /usr/bin/gdb, logs stored in /tmp
xfce4-panel(module-factory): reading /usr/share/xfce4/panel/plugins
xfce4-panel(module-factory): reading /usr/share/xfce4/panel-plugins
xfce4-panel(application): found window manager after 1 tries
xfce4-panel(base-window): 0x55b079ed60c0: rgba colormap=0x55b079ee52d0, compositing=true
xfce4-panel(base-window): 0x55b079ed60c0: rgba colormap=0x55b079ee52d0, compositing=true
xfce4-panel(display-layout): 0x55b079ed60c0: display=:0.0{comp=true}, screen-0[0x55b079e84b30]=[1366,768] (monitor-0=[0,0;1366,768])
xfce4-panel(positioning): 0x55b079ed60c0: screen=0x55b079e84b30, monitors=1, output-name=(null), span-monitors=false, base=683,746
xfce4-panel(positioning): 0x55b079ed60c0: working-area: screen=0x55b079e84b30, x=0, y=0, w=1366, h=768
xfce4-panel(struts): 0x55b079ed60c0: bottom=41, start_x=0, end_x=1365
xfce4-panel(external): register dbus path /org/xfce/Panel/Wrapper/2
xfce4-panel(module): new item (type=external-wrapper, name=whiskermenu, id=2)
xfce4-panel(external): whiskermenu-2: child spawned; pid=1965, argc=25
xfce4-panel(module): new item (type=object-type, name=separator, id=9)
xfce4-panel(module): new item (type=object-type, name=tasklist, id=6)
xfce4-panel(module): new item (type=object-type, name=separator, id=10)
xfce4-panel(external): register dbus path /org/xfce/Panel/Wrapper/11
xfce4-panel(module): new item (type=external-wrapper, name=pulseaudio, id=11)
xfce4-panel(external): pulseaudio-11: child spawned; pid=1968, argc=25
xfce4-panel(external): register dbus path /org/xfce/Panel/Wrapper/4
xfce4-panel(module): new item (type=external-wrapper, name=systray, id=4)
xfce4-panel(external): systray-4: child spawned; pid=1969, argc=25
xfce4-panel(external): register dbus path /org/xfce/Panel/Wrapper/13
xfce4-panel(module): new item (type=external-wrapper, name=datetime, id=13)
xfce4-panel(external): datetime-13: child spawned; pid=1971, argc=25
xfce4-panel(base-window): 0x55b079ed6350: rgba colormap=0x55b079ee52d0, compositing=true
xfce4-panel(base-window): 0x55b079ed6350: rgba colormap=0x55b079ee52d0, compositing=true
xfce4-panel(base-window): 0x55b079f63050: rgba colormap=0x55b079ee52d0, compositing=true
xfce4-panel(display-layout): 0x55b079ed6350: display=:0.0{comp=true}, screen-0[0x55b079e84b30]=[1366,768] (monitor-0=[0,0;1366,768])
xfce4-panel(positioning): 0x55b079ed6350: screen=0x55b079e84b30, monitors=1, output-name=(null), span-monitors=false, base=683,25
xfce4-panel(positioning): 0x55b079ed6350: working-area: screen=0x55b079e84b30, x=0, y=0, w=1366, h=768
xfce4-panel(base-window): 0x55b079ed65e0: rgba colormap=0x55b079ee52d0, compositing=true
xfce4-panel(base-window): 0x55b079ed65e0: rgba colormap=0x55b079ee52d0, compositing=true
xfce4-panel(base-window): 0x55b079f631c0: rgba colormap=0x55b079ee52d0, compositing=true
xfce4-panel(display-layout): 0x55b079ed65e0: display=:0.0{comp=true}, screen-0[0x55b079e84b30]=[1366,768] (monitor-0=[0,0;1366,768])
xfce4-panel(positioning): 0x55b079ed65e0: screen=0x55b079e84b30, monitors=1, output-name=(null), span-monitors=false, base=25,388
xfce4-panel(positioning): 0x55b079ed65e0: working-area: screen=0x55b079e84b30, x=0, y=0, w=1366, h=768
(xfce4-panel:1964): Wnck-WARNING **: Unhandled action type _OB_WM_ACTION_UNDECORATE
(xfce4-panel:1964): Wnck-WARNING **: Unhandled action type _OB_WM_ACTION_UNDECORATE
xfce4-panel(display-layout): 0x55b079ed6350: display=:0.0{comp=true}, screen-0[0x55b079e84b30]=[1366,768] (monitor-0=[0,0;1366,768])
xfce4-panel(positioning): 0x55b079ed6350: screen=0x55b079e84b30, monitors=1, output-name=(null), span-monitors=false, base=683,25
xfce4-panel(positioning): 0x55b079ed6350: working-area: screen=0x55b079e84b30, x=0, y=0, w=1366, h=768
xfce4-panel(external): systray-4: child is embedded; 6 properties in queue
xfce4-panel(systray): registered manager on screen 0
xfce4-panel(external): whiskermenu-2: child is embedded; 6 properties in queue
xfce4-panel(external): datetime-13: child is embedded; 6 properties in queue
(wrapper-2.0:1979): Gtk-WARNING **: Negative content width -11 (allocation 1, extents 6x6) while allocating gadget (node button, owner GtkToggleButton)
xfce4-panel(external): pulseaudio-11: child is embedded; 6 properties in queue
(wrapper-2.0:1985): Gtk-WARNING **: Theme parsing error: <data>:1:47: The style property GtkWidget:focus-padding is deprecated and shouldn't be used anymore. It will be removed in a future version
(wrapper-2.0:1985): Gtk-WARNING **: Theme parsing error: <data>:1:79: The style property GtkWidget:focus-line-width is deprecated and shouldn't be used anymore. It will be removed in a future version
(wrapper-2.0:1985): Gtk-WARNING **: Theme parsing error: <data>:1:109: The style property GtkButton:default-border is deprecated and shouldn't be used anymore. It will be removed in a future version
(wrapper-2.0:1985): Gtk-WARNING **: Theme parsing error: <data>:1:137: The style property GtkButton:inner-border is deprecated and shouldn't be used anymore. It will be removed in a future version
(wrapper-2.0:1985): Gtk-WARNING **: Negative content width -1 (allocation 1, extents 1x1) while allocating gadget (node button, owner PulseaudioButton)
xfce4-panel(display-layout): 0x55b079ed65e0: display=:0.0{comp=true}, screen-0[0x55b079e84b30]=[1366,768] (monitor-0=[0,0;1366,768])
xfce4-panel(positioning): 0x55b079ed65e0: screen=0x55b079e84b30, monitors=1, output-name=(null), span-monitors=false, base=25,388
xfce4-panel(positioning): 0x55b079ed65e0: working-area: screen=0x55b079e84b30, x=0, y=0, w=1366, h=768
xfce4-panel(display-layout): 0x55b079ed6350: display=:0.0{comp=true}, screen-0[0x55b079e84b30]=[1366,768] (monitor-0=[0,0;1366,768])
xfce4-panel(positioning): 0x55b079ed6350: screen=0x55b079e84b30, monitors=1, output-name=(null), span-monitors=false, base=683,25
xfce4-panel(positioning): 0x55b079ed6350: working-area: screen=0x55b079e84b30, x=0, y=0, w=1366, h=768
xfce4-panel(display-layout): 0x55b079ed65e0: display=:0.0{comp=true}, screen-0[0x55b079e84b30]=[1366,768] (monitor-0=[0,0;1366,768])
xfce4-panel(positioning): 0x55b079ed65e0: screen=0x55b079e84b30, monitors=1, output-name=(null), span-monitors=false, base=25,388
xfce4-panel(positioning): 0x55b079ed65e0: working-area: screen=0x55b079e84b30, x=0, y=0, w=1366, h=768
(xfce4-panel:1964): Wnck-WARNING **: Unhandled action type _OB_WM_ACTION_UNDECORATE
(xfce4-panel:1964): Wnck-WARNING **: Unhandled action type _OB_WM_ACTION_UNDECORATE
(xfce4-panel:1964): Wnck-WARNING **: Unhandled action type _OB_WM_ACTION_UNDECORATE
(xfce4-panel:1964): Wnck-WARNING **: Unhandled action type _OB_WM_ACTION_UNDECORATE
xfce4-panel(display-layout): 0x55b079ed6350: display=:0.0{comp=true}, screen-0[0x55b079e84b30]=[1366,768] (monitor-0=[0,0;1366,768])
xfce4-panel(positioning): 0x55b079ed6350: screen=0x55b079e84b30, monitors=1, output-name=(null), span-monitors=false, base=683,25
xfce4-panel(positioning): 0x55b079ed6350: working-area: screen=0x55b079e84b30, x=0, y=0, w=1366, h=768
xfce4-panel(display-layout): 0x55b079ed65e0: display=:0.0{comp=true}, screen-0[0x55b079e84b30]=[1366,768] (monitor-0=[0,0;1366,768])
xfce4-panel(positioning): 0x55b079ed65e0: screen=0x55b079e84b30, monitors=1, output-name=(null), span-monitors=false, base=25,388
xfce4-panel(positioning): 0x55b079ed65e0: working-area: screen=0x55b079e84b30, x=0, y=0, w=1366, h=768
(xfce4-panel:1964): GLib-GObject-WARNING **: /build/glib2.0-B1uXKV/glib2.0-2.50.3/./gobject/gsignal.c:3492: signal name 'selection_changed' is invalid for instance '0x55b07a0221c0' of type 'GailMenuItem'
(xfce4-panel:1964): libtasklist-CRITICAL **: tasklist-widget.c:1777 (xfce_tasklist_window_removed): expression 'n == 5' failed.
xfce4-panel(display-layout): 0x55b079ed6350: display=:0.0{comp=true}, screen-0[0x55b079e84b30]=[1366,768] (monitor-0=[0,0;1366,768])
xfce4-panel(positioning): 0x55b079ed6350: screen=0x55b079e84b30, monitors=1, output-name=(null), span-monitors=false, base=683,25
xfce4-panel(positioning): 0x55b079ed6350: working-area: screen=0x55b079e84b30, x=0, y=0, w=1366, h=768
xfce4-panel(display-layout): 0x55b079ed65e0: display=:0.0{comp=true}, screen-0[0x55b079e84b30]=[1366,768] (monitor-0=[0,0;1366,768])
xfce4-panel(positioning): 0x55b079ed65e0: screen=0x55b079e84b30, monitors=1, output-name=(null), span-monitors=false, base=25,388
xfce4-panel(positioning): 0x55b079ed65e0: working-area: screen=0x55b079e84b30, x=0, y=0, w=1366, h=768
(xfce4-panel:1964): GLib-GObject-WARNING **: /build/glib2.0-B1uXKV/glib2.0-2.50.3/./gobject/gsignal.c:3492: signal name 'selection_changed' is invalid for instance '0x55b07a022040' of type 'GailMenuItem'
(xfce4-panel:1964): libtasklist-CRITICAL **: tasklist-widget.c:2681 (xfce_tasklist_button_enter_notify_event): expression 'XFCE_IS_TASKLIST (child->tasklist)' failed.
(xfce4-panel:1964): libtasklist-CRITICAL **: tasklist-widget.c:2805 (xfce_tasklist_button_enter_notify_event_disconnected): expression 'WNCK_IS_WINDOW (child->window)' failed.
(xfce4-panel:1964): GLib-GObject-WARNING **: instance with invalid (NULL) class pointer
(xfce4-panel:1964): GLib-GObject-CRITICAL **: g_signal_handlers_disconnect_matched: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
(xfce4-panel:1964): libtasklist-CRITICAL **: tasklist-widget.c:2684 (xfce_tasklist_button_enter_notify_event): expression 'WNCK_IS_WINDOW (child->window)' failed.
(xfce4-panel:1964): libtasklist-CRITICAL **: tasklist-widget.c:1871 (xfce_tasklist_update_icon_geometries): expression 'WNCK_IS_WINDOW (child->window)' failed.
(xfce4-panel:1964): libtasklist-CRITICAL **: tasklist-widget.c:2883 (xfce_tasklist_button_activate): expression 'WNCK_IS_WINDOW (child->window)' failed.
(xfce4-panel:1964): libtasklist-CRITICAL **: tasklist-widget.c:2883 (xfce_tasklist_button_activate): expression 'WNCK_IS_WINDOW (child->window)' failed.
(xfce4-panel:1964): libtasklist-CRITICAL **: tasklist-widget.c:1871 (xfce_tasklist_update_icon_geometries): expression 'WNCK_IS_WINDOW (child->window)' failed.
(xfce4-panel:1964): libtasklist-CRITICAL **: tasklist-widget.c:1871 (xfce_tasklist_update_icon_geometries): expression 'WNCK_IS_WINDOW (child->window)' failed.
(xfce4-panel:1964): libtasklist-CRITICAL **: tasklist-widget.c:2325 (xfce_tasklist_button_compare): expression 'a->type == CHILD_TYPE_GROUP || WNCK_IS_WINDOW (a->window)' failed.
(xfce4-panel:1964): libtasklist-CRITICAL **: tasklist-widget.c:2327 (xfce_tasklist_button_compare): expression 'b->type == CHILD_TYPE_GROUP || WNCK_IS_WINDOW (b->window)' failed.
(xfce4-panel:1964): libtasklist-CRITICAL **: tasklist-widget.c:1871 (xfce_tasklist_update_icon_geometries): expression 'WNCK_IS_WINDOW (child->window)' failed.
xfce4-panel(display-layout): 0x55b079ed6350: display=:0.0{comp=true}, screen-0[0x55b079e84b30]=[1366,768] (monitor-0=[0,0;1366,768])
xfce4-panel(positioning): 0x55b079ed6350: screen=0x55b079e84b30, monitors=1, output-name=(null), span-monitors=false, base=683,25
xfce4-panel(positioning): 0x55b079ed6350: working-area: screen=0x55b079e84b30, x=0, y=0, w=1366, h=768
(xfce4-panel:1964): libtasklist-CRITICAL **: tasklist-widget.c:2684 (xfce_tasklist_button_enter_notify_event): expression 'WNCK_IS_WINDOW (child->window)' failed.
^Cxfce4-panel(main): received signal Interruzione <2>, quitting panel
xfce4-panel(application): saving /panels/panel-1: ids=false, providers=true
xfce4-panel(application): saving /panels/panel-2: ids=false, providers=true
xfce4-panel(application): saving /panels/panel-3: ids=false, providers=true
xfce4-panel(external): whiskermenu-2: plugin unrealized; quitting child
(xfce4-panel:1964): libtasklist-CRITICAL **: tasklist-widget.c:3526 (xfce_tasklist_group_button_remove): expression 'WNCK_IS_CLASS_GROUP (group_child->class_group)' failed.
(xfce4-panel:1964): libtasklist-CRITICAL **: tasklist-widget.c:1528 (xfce_tasklist_disconnect_screen): expression 'WNCK_IS_WINDOW (child->window)' failed.
xfce4-panel(external): pulseaudio-11: plugin unrealized; quitting child
xfce4-panel(external): systray-4: plugin unrealized; quitting child
xfce4-panel(external): datetime-13: plugin unrealized; quitting child
(xfce4-panel:1964): libtasklist-CRITICAL **: tasklist-widget.c:3614 (xfce_tasklist_group_button_child_destroyed): expression 'WNCK_IS_CLASS_GROUP (group_child->class_group)' failed.
(xfce4-panel:1964): libtasklist-CRITICAL **: tasklist-widget.c:771 (xfce_tasklist_finalize): expression 'tasklist->screen == NULL' failed.
xfce4-panel(application): finalizedxfce4-panel(main): version 4.12.1 on gtk+ 2.24.31 (2.24.31), glib 2.50.3 (2.50.2)
xfce4-panel(module-factory): reading /usr/share/xfce4/panel/plugins
xfce4-panel(module-factory): reading /usr/share/xfce4/panel-plugins
xfce4-panel(application): found window manager after 1 tries
xfce4-panel(base-window): 0x5593844840c0: rgba colormap=0x559384493ad0, compositing=true
xfce4-panel(base-window): 0x5593844840c0: rgba colormap=0x559384493ad0, compositing=true
xfce4-panel(display-layout): 0x5593844840c0: display=:0.0{comp=true}, screen-0[0x559384434000]=[1366,768] (monitor-0=[0,0;1366,768])
xfce4-panel(positioning): 0x5593844840c0: screen=0x559384434000, monitors=1, output-name=(null), span-monitors=false, base=683,746
xfce4-panel(positioning): 0x5593844840c0: working-area: screen=0x559384434000, x=0, y=0, w=1366, h=768
xfce4-panel(struts): 0x5593844840c0: bottom=41, start_x=0, end_x=1365
xfce4-panel(external): register dbus path /org/xfce/Panel/Wrapper/2
xfce4-panel(module): new item (type=external-wrapper, name=whiskermenu, id=2)
xfce4-panel(external): whiskermenu-2: child spawned; pid=1604, argc=8
xfce4-panel(module): new item (type=object-type, name=separator, id=9)
xfce4-panel(module): new item (type=object-type, name=tasklist, id=6)
xfce4-panel(module): new item (type=object-type, name=separator, id=10)
xfce4-panel(external): register dbus path /org/xfce/Panel/Wrapper/11
xfce4-panel(module): new item (type=external-wrapper, name=pulseaudio, id=11)
xfce4-panel(external): pulseaudio-11: child spawned; pid=1606, argc=8
xfce4-panel(external): register dbus path /org/xfce/Panel/Wrapper/4
xfce4-panel(module): new item (type=external-wrapper, name=systray, id=4)
xfce4-panel(external): systray-4: child spawned; pid=1607, argc=8
xfce4-panel(external): register dbus path /org/xfce/Panel/Wrapper/13
xfce4-panel(module): new item (type=external-wrapper, name=datetime, id=13)
xfce4-panel(external): datetime-13: child spawned; pid=1613, argc=8
xfce4-panel(module): new item (type=object-type, name=showdesktop, id=1)
xfce4-panel(base-window): 0x559384484350: rgba colormap=0x559384493ad0, compositing=true
xfce4-panel(base-window): 0x559384484350: rgba colormap=0x559384493ad0, compositing=true
xfce4-panel(base-window): 0x55938451b050: rgba colormap=0x559384493ad0, compositing=true
xfce4-panel(display-layout): 0x559384484350: display=:0.0{comp=true}, screen-0[0x559384434000]=[1366,768] (monitor-0=[0,0;1366,768])
xfce4-panel(positioning): 0x559384484350: screen=0x559384434000, monitors=1, output-name=(null), span-monitors=false, base=683,25
xfce4-panel(positioning): 0x559384484350: working-area: screen=0x559384434000, x=0, y=0, w=1366, h=768
xfce4-panel(base-window): 0x5593844845e0: rgba colormap=0x559384493ad0, compositing=true
xfce4-panel(base-window): 0x5593844845e0: rgba colormap=0x559384493ad0, compositing=true
xfce4-panel(base-window): 0x55938451b1c0: rgba colormap=0x559384493ad0, compositing=true
xfce4-panel(display-layout): 0x5593844845e0: display=:0.0{comp=true}, screen-0[0x559384434000]=[1366,768] (monitor-0=[0,0;1366,768])
xfce4-panel(positioning): 0x5593844845e0: screen=0x559384434000, monitors=1, output-name=(null), span-monitors=false, base=25,388
xfce4-panel(positioning): 0x5593844845e0: working-area: screen=0x559384434000, x=0, y=0, w=1366, h=768
xfce4-panel(external): whiskermenu-2: child is embedded; 6 properties in queue
(xfce4-panel:1603): Wnck-WARNING **: Unhandled action type _OB_WM_ACTION_UNDECORATE
(xfce4-panel:1603): Wnck-WARNING **: Unhandled action type _OB_WM_ACTION_UNDECORATE
xfce4-panel(display-layout): 0x559384484350: display=:0.0{comp=true}, screen-0[0x559384434000]=[1366,768] (monitor-0=[0,0;1366,768])
xfce4-panel(positioning): 0x559384484350: screen=0x559384434000, monitors=1, output-name=(null), span-monitors=false, base=683,25
xfce4-panel(positioning): 0x559384484350: working-area: screen=0x559384434000, x=0, y=0, w=1366, h=768
xfce4-panel(display-layout): 0x5593844845e0: display=:0.0{comp=true}, screen-0[0x559384434000]=[1366,768] (monitor-0=[0,0;1366,768])
xfce4-panel(positioning): 0x5593844845e0: screen=0x559384434000, monitors=1, output-name=(null), span-monitors=false, base=25,388
xfce4-panel(positioning): 0x5593844845e0: working-area: screen=0x559384434000, x=0, y=0, w=1366, h=768
xfce4-panel(external): systray-4: child is embedded; 6 properties in queue
xfce4-panel(systray): registered manager on screen 0
xfce4-panel(external): pulseaudio-11: child is embedded; 6 properties in queue
(wrapper-2.0:1606): Gtk-WARNING **: Theme parsing error: <data>:1:47: The style property GtkWidget:focus-padding is deprecated and shouldn't be used anymore. It will be removed in a future version
(wrapper-2.0:1606): Gtk-WARNING **: Theme parsing error: <data>:1:79: The style property GtkWidget:focus-line-width is deprecated and shouldn't be used anymore. It will be removed in a future version
(wrapper-2.0:1606): Gtk-WARNING **: Theme parsing error: <data>:1:109: The style property GtkButton:default-border is deprecated and shouldn't be used anymore. It will be removed in a future version
(wrapper-2.0:1606): Gtk-WARNING **: Theme parsing error: <data>:1:137: The style property GtkButton:inner-border is deprecated and shouldn't be used anymore. It will be removed in a future version
xfce4-panel(external): datetime-13: child is embedded; 6 properties in queue
(wrapper-2.0:1606): Gtk-WARNING **: Negative content width -1 (allocation 1, extents 1x1) while allocating gadget (node button, owner PulseaudioButton)
(wrapper-2.0:1613): Gtk-WARNING **: Negative content width -11 (allocation 1, extents 6x6) while allocating gadget (node button, owner GtkToggleButton)
xfce4-panel(display-layout): 0x5593844845e0: display=:0.0{comp=true}, screen-0[0x559384434000]=[1366,768] (monitor-0=[0,0;1366,768])
xfce4-panel(positioning): 0x5593844845e0: screen=0x559384434000, monitors=1, output-name=(null), span-monitors=false, base=25,388
xfce4-panel(positioning): 0x5593844845e0: working-area: screen=0x559384434000, x=0, y=0, w=1366, h=768
(xfce4-panel:1603): Wnck-WARNING **: Unhandled action type _OB_WM_ACTION_UNDECORATE
xfce4-panel(display-layout): 0x5593844845e0: display=:0.0{comp=true}, screen-0[0x559384434000]=[1366,768] (monitor-0=[0,0;1366,768])
xfce4-panel(positioning): 0x5593844845e0: screen=0x559384434000, monitors=1, output-name=(null), span-monitors=false, base=25,388
xfce4-panel(positioning): 0x5593844845e0: working-area: screen=0x559384434000, x=0, y=0, w=1366, h=768
xfce4-panel(display-layout): 0x5593844845e0: display=:0.0{comp=true}, screen-0[0x559384434000]=[1366,768] (monitor-0=[0,0;1366,768])
xfce4-panel(positioning): 0x5593844845e0: screen=0x559384434000, monitors=1, output-name=(null), span-monitors=false, base=25,388
xfce4-panel(positioning): 0x5593844845e0: working-area: screen=0x559384434000, x=0, y=0, w=1366, h=768
xfce4-panel(display-layout): 0x559384484350: display=:0.0{comp=true}, screen-0[0x559384434000]=[1366,768] (monitor-0=[0,0;1366,768])
xfce4-panel(positioning): 0x559384484350: screen=0x559384434000, monitors=1, output-name=(null), span-monitors=false, base=683,25
xfce4-panel(positioning): 0x559384484350: working-area: screen=0x559384434000, x=0, y=0, w=1366, h=768
(xfce4-panel:1603): Wnck-WARNING **: Unhandled action type _OB_WM_ACTION_UNDECORATE
xfce4-panel(display-layout): 0x5593844845e0: display=:0.0{comp=true}, screen-0[0x559384434000]=[1366,768] (monitor-0=[0,0;1366,768])
xfce4-panel(positioning): 0x5593844845e0: screen=0x559384434000, monitors=1, output-name=(null), span-monitors=false, base=25,388
xfce4-panel(positioning): 0x5593844845e0: working-area: screen=0x559384434000, x=0, y=0, w=1366, h=768
(xfce4-panel:1603): Wnck-WARNING **: Unhandled action type _OB_WM_ACTION_UNDECORATE
xfce4-panel(display-layout): 0x5593844845e0: display=:0.0{comp=true}, screen-0[0x559384434000]=[1366,768] (monitor-0=[0,0;1366,768])
xfce4-panel(positioning): 0x5593844845e0: screen=0x559384434000, monitors=1, output-name=(null), span-monitors=false, base=25,388
xfce4-panel(positioning): 0x5593844845e0: working-area: screen=0x559384434000, x=0, y=0, w=1366, h=768
(xfce4-panel:1603): Wnck-WARNING **: Unhandled action type _OB_WM_ACTION_UNDECORATE
(xfce4-panel:1603): Wnck-WARNING **: Unhandled action type _OB_WM_ACTION_UNDECORATE
(xfce4-panel:1603): GLib-GObject-WARNING **: /build/glib2.0-B1uXKV/glib2.0-2.50.3/./gobject/gsignal.c:3492: signal name 'selection_changed' is invalid for instance '0x55938469e8a0' of type 'GailMenuItem'
(xfce4-panel:1603): libtasklist-CRITICAL **: tasklist-widget.c:1777 (xfce_tasklist_window_removed): expression 'n == 5' failed.
xfce4-panel(display-layout): 0x5593844845e0: display=:0.0{comp=true}, screen-0[0x559384434000]=[1366,768] (monitor-0=[0,0;1366,768])
xfce4-panel(positioning): 0x5593844845e0: screen=0x559384434000, monitors=1, output-name=(null), span-monitors=false, base=25,388
xfce4-panel(positioning): 0x5593844845e0: working-area: screen=0x559384434000, x=0, y=0, w=1366, h=768
(xfce4-panel:1603): GLib-GObject-WARNING **: /build/glib2.0-B1uXKV/glib2.0-2.50.3/./gobject/gsignal.c:3492: signal name 'selection_changed' is invalid for instance '0x55938469c680' of type 'GailMenuItem'
xfce4-panel(display-layout): 0x559384484350: display=:0.0{comp=true}, screen-0[0x559384434000]=[1366,768] (monitor-0=[0,0;1366,768])
xfce4-panel(positioning): 0x559384484350: screen=0x559384434000, monitors=1, output-name=(null), span-monitors=false, base=683,25
xfce4-panel(positioning): 0x559384484350: working-area: screen=0x559384434000, x=0, y=0, w=1366, h=768
xfce4-panel(display-layout): 0x5593844845e0: display=:0.0{comp=true}, screen-0[0x559384434000]=[1366,768] (monitor-0=[0,0;1366,768])
xfce4-panel(positioning): 0x5593844845e0: screen=0x559384434000, monitors=1, output-name=(null), span-monitors=false, base=25,388
xfce4-panel(positioning): 0x5593844845e0: working-area: screen=0x559384434000, x=0, y=0, w=1366, h=768
(xfce4-panel:1603): libtasklist-CRITICAL **: tasklist-widget.c:2681 (xfce_tasklist_button_enter_notify_event): expression 'XFCE_IS_TASKLIST (child->tasklist)' failed.
(xfce4-panel:1603): libtasklist-CRITICAL **: tasklist-widget.c:2805 (xfce_tasklist_button_enter_notify_event_disconnected): expression 'WNCK_IS_WINDOW (child->window)' failed.
(xfce4-panel:1603): libtasklist-CRITICAL **: tasklist-widget.c:1871 (xfce_tasklist_update_icon_geometries): expression 'WNCK_IS_WINDOW (child->window)' failed.
(xfce4-panel:1603): libtasklist-CRITICAL **: tasklist-widget.c:2883 (xfce_tasklist_button_activate): expression 'WNCK_IS_WINDOW (child->window)' failed.
(xfce4-panel:1603): GLib-GObject-WARNING **: instance with invalid (NULL) class pointer
(xfce4-panel:1603): GLib-GObject-CRITICAL **: g_signal_handlers_disconnect_matched: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed
^Cxfce4-panel(main): received signal Interruzione <2>, quitting panel
xfce4-panel(external): pulseaudio-11: child exited with status 2
xfce4-panel-Message: Plugin pulseaudio-11 has been automatically restarted after crash.
xfce4-panel(external): pulseaudio-11: scheduled a respawn of the child
xfce4-panel(external): systray-4: child exited with status 2
xfce4-panel-Message: Plugin systray-4 has been automatically restarted after crash.
xfce4-panel(external): systray-4: scheduled a respawn of the child
xfce4-panel(external): datetime-13: child exited with status 2
xfce4-panel-Message: Plugin datetime-13 has been automatically restarted after crash.
xfce4-panel(external): datetime-13: scheduled a respawn of the child
xfce4-panel(application): saving /panels/panel-1: ids=false, providers=true
xfce4-panel(application): saving /panels/panel-2: ids=false, providers=true
xfce4-panel(application): saving /panels/panel-3: ids=false, providers=true
xfce4-panel(external): whiskermenu-2: plugin unrealized; quitting child
(xfce4-panel:1603): libtasklist-CRITICAL **: tasklist-widget.c:3526 (xfce_tasklist_group_button_remove): expression 'WNCK_IS_CLASS_GROUP (group_child->class_group)' failed.
(xfce4-panel:1603): libtasklist-CRITICAL **: tasklist-widget.c:1528 (xfce_tasklist_disconnect_screen): expression 'WNCK_IS_WINDOW (child->window)' failed.
xfce4-panel(external): pulseaudio-11: plugin unrealized; quitting child
xfce4-panel(external): systray-4: plugin unrealized; quitting child
xfce4-panel(external): datetime-13: plugin unrealized; quitting child
(xfce4-panel:1603): libtasklist-CRITICAL **: tasklist-widget.c:3614 (xfce_tasklist_group_button_child_destroyed): expression 'WNCK_IS_CLASS_GROUP (group_child->class_group)' failed.
(xfce4-panel:1603): libtasklist-CRITICAL **: tasklist-widget.c:771 (xfce_tasklist_finalize): expression 'tasklist->screen == NULL' failed.
xfce4-panel(application): finalized
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