Xfce4-panel dumped core

My xfce-panel just crashed for no apparent reason. It doesn’t do this regularly, I just happened to catch it because of the visible panel glitch after the crash.

All currently available updates are installed. Some seemingly relevant info and the journal log are below.

Is this something the Manjaro team could fix, or should we just wait for an upstream fix from xfce /gtk / whereever the original issue comes from?

# pacman -Qs 'xfce4-panel|glib-2|gtk-3|glibc' | grep local/
local/glib2 2.66.0-1
local/glibc 2.32-4
local/gtk3 1:3.24.23-1
local/lib32-glib2 2.66.0-1
local/lib32-glibc 2.32-4
local/nss-mdns 0.14.1-3
local/xfce4-panel 4.14.4-1 (xfce4)
# uname -r
 systemd-coredump[816142]: Process 1581 (xfce4-panel) of user 1000 dumped core.
                                                  Stack trace of thread 1581:
                                                  #0  0x00007fb89186146b n/a (libtasklist.so + 0x846b)
                                                  #1  0x00007fb893c698b0 g_closure_unref (libgobject-2.0.so.0 + 0x128b0)
                                                  #2  0x00007fb893c855aa g_signal_handlers_destroy (libgobject-2.0.so.0 + 0x2e5aa)
                                                  #3  0x00007fb893c70efa n/a (libgobject-2.0.so.0 + 0x19efa)
                                                  #4  0x00007fb893c6b89a g_object_run_dispose (libgobject-2.0.so.0 + 0x1489a)
                                                  #5  0x00007fb894305b2d n/a (libgtk-3.so.0 + 0x1f2b2d)
                                                  #6  0x00007fb894215378 n/a (libgtk-3.so.0 + 0x102378)
                                                  #7  0x00007fb893c6a052 g_closure_invoke (libgobject-2.0.so.0 + 0x13052)
                                                  #8  0x00007fb893c9293e n/a (libgobject-2.0.so.0 + 0x3b93e)
                                                  #9  0x00007fb893c8657d g_signal_emit_valist (libgobject-2.0.so.0 + 0x2f57d)
                                                  #10 0x00007fb893c86ae0 g_signal_emit (libgobject-2.0.so.0 + 0x2fae0)
                                                  #11 0x00007fb8944554c2 n/a (libgtk-3.so.0 + 0x3424c2)
                                                  #12 0x00007fb893c6b89a g_object_run_dispose (libgobject-2.0.so.0 + 0x1489a)
                                                  #13 0x00007fb891865729 n/a (libtasklist.so + 0xc729)
                                                  #14 0x00007fb893c8696a g_signal_emit_valist (libgobject-2.0.so.0 + 0x2f96a)
                                                  #15 0x00007fb893c86ae0 g_signal_emit (libgobject-2.0.so.0 + 0x2fae0)
                                                  #16 0x00007fb89430af26 gtk_menu_shell_activate_item (libgtk-3.so.0 + 0x1f7f26)
                                                  #17 0x00007fb89430b1d4 n/a (libgtk-3.so.0 + 0x1f81d4)
                                                  #18 0x00007fb894196249 n/a (libgtk-3.so.0 + 0x83249)
                                                  #19 0x00007fb893c8696a g_signal_emit_valist (libgobject-2.0.so.0 + 0x2f96a)
                                                  #20 0x00007fb893c86ae0 g_signal_emit (libgobject-2.0.so.0 + 0x2fae0)
                                                  #21 0x00007fb89445b705 n/a (libgtk-3.so.0 + 0x348705)
                                                  #22 0x00007fb8942f4de5 n/a (libgtk-3.so.0 + 0x1e1de5)
                                                  #23 0x00007fb8942f613d gtk_main_do_event (libgtk-3.so.0 + 0x1e313d)
                                                  #24 0x00007fb894050873 n/a (libgdk-3.so.0 + 0x3c873)
                                                  #25 0x00007fb8940a0db4 n/a (libgdk-3.so.0 + 0x8cdb4)
                                                  #26 0x00007fb893b79bfc g_main_context_dispatch (libglib-2.0.so.0 + 0x52bfc)
                                                  #27 0x00007fb893bcb1f9 n/a (libglib-2.0.so.0 + 0xa41f9)
                                                  #28 0x00007fb893b79163 g_main_loop_run (libglib-2.0.so.0 + 0x52163)
                                                  #29 0x00007fb8942f321f gtk_main (libgtk-3.so.0 + 0x1e021f)
                                                  #30 0x000055cc6ef3638a main (xfce4-panel + 0x1138a)
                                                  #31 0x00007fb893840152 __libc_start_main (libc.so.6 + 0x28152)
                                                  #32 0x000055cc6ef3696e _start (xfce4-panel + 0x1196e)
                                                  Stack trace of thread 1584:
                                                  #0  0x00007fb89390d46f __poll (libc.so.6 + 0xf546f)
                                                  #1  0x00007fb893bcb188 n/a (libglib-2.0.so.0 + 0xa4188)
                                                  #2  0x00007fb893b78421 g_main_context_iteration (libglib-2.0.so.0 + 0x51421)
                                                  #3  0x00007fb893b78472 n/a (libglib-2.0.so.0 + 0x51472)
                                                  #4  0x00007fb893ba6a91 n/a (libglib-2.0.so.0 + 0x7fa91)
                                                  #5  0x00007fb8937fd3e9 start_thread (libpthread.so.0 + 0x93e9)
                                                  #6  0x00007fb893918293 __clone (libc.so.6 + 0x100293)
                                                  Stack trace of thread 1585:
                                                  #0  0x00007fb89390d46f __poll (libc.so.6 + 0xf546f)
                                                  #1  0x00007fb893bcb188 n/a (libglib-2.0.so.0 + 0xa4188)
                                                  #2  0x00007fb893b79163 g_main_loop_run (libglib-2.0.so.0 + 0x52163)
                                                  #3  0x00007fb893db0fe8 n/a (libgio-2.0.so.0 + 0x101fe8)
                                                  #4  0x00007fb893ba6a91 n/a (libglib-2.0.so.0 + 0x7fa91)
                                                  #5  0x00007fb8937fd3e9 start_thread (libpthread.so.0 + 0x93e9)
                                                  #6  0x00007fb893918293 __clone (libc.so.6 + 0x100293)
systemd-coredump@1-816136-0.service: Succeeded.

Hi, If you have xfce panel switch on your system you just have to go to settings and open it, you desp you select the default,

Also Reset XFCE Panel to Default Settings

Shut down the panel first, xfce4-panel --quit

Kill the xfce4 configuration daemon
pkill xfconfd

First delete settings for the panel
rm -rf ~/.config/xfce4/panel

Clear out the settings for xfconfd 
rm -rf ~/.config/xfce4/xfconf/xfce-perchannel-xml/xfce4-panel.xml

Restart the panel run

Hi @pablomhr!

First of all, thanks for the reply!

Doing what you suggest would obliterate all my panel settings (custom indicators, arrangement, etc.), which I definitely don’t want to do.

If the point is to just diagnose whether the issue is caused by some faulty setting / panel plugin / etc., the bad news is that I can’t explicitly reproduce the issue with my current setup either. The panel crashed, then restarted automatically and has been working fine ever since.

Looking at the journal, this is the first panel crash since the last update/boot (~2 days ago) and I don’t recall any specific event that could have triggered it, so resetting the panel to default and observing that it doesn’t crash for a while would not really confirm anything.

(Although it could be helpful for other people who experience frequent crashes or crashes on specific events.)

Nothing untoward happening here.