Attached is gdb's output.
PID: 1425 (mate-panel)
UID: 1000 (agafnd)
GID: 1000 (agafnd)
Signal: 11 (SEGV)
Timestamp: Wed 2018-01-03 20:29:25 EST (37min ago)
Command Line: mate-panel
Executable: /usr/bin/mate-panel
Control Group: /user.slice/user-1000.slice/session-2.scope
Unit: session-2.scope
Slice: user-1000.slice
Session: 2
Owner UID: 1000 (agafnd)
Boot ID: 7f5d3800c55b45cfabdf5d5e8c428fd8
Machine ID: edb4e92bf1344c59b79e8a65e829b34f
Hostname: agafndbox
Storage:
/var/lib/systemd/coredump/core.mate-panel.1000.7f5d3800c55b45cfabdf5d5e8c428fd8.1425.1515029365000000000000.lz4
Message: Process 1425 (mate-panel) of user 1000 dumped core.
Stack trace of thread 1425:
#0 0x00007f0883f37823 gtk_drag_finish (libgtk-3.so.0)
#1 0x00007f0883f37c5b n/a (libgtk-3.so.0)
#2 0x00007f0883f37e87 n/a (libgtk-3.so.0)
#3 0x00007f08838c36e8 n/a (libgdk-3.so.0)
#4 0x00007f0881ba1123 n/a (libglib-2.0.so.0)
#5 0x00007f0881ba06aa g_main_context_dispatch
(libglib-2.0.so.0)
#6 0x00007f0881ba0a60 n/a (libglib-2.0.so.0)
#7 0x00007f0881ba0d82 g_main_loop_run (libglib-2.0.so.0)
#8 0x00007f0883dbcd55 gtk_main (libgtk-3.so.0)
#9 0x0000558069e198a6 main (mate-panel)
#10 0x00007f0880b672b1 __libc_start_main (libc.so.6)
#11 0x0000558069e19a1a _start (mate-panel)
Stack trace of thread 1431:
#0 0x00007f0880c266ad poll (libc.so.6)
#1 0x00007f0881ba09f6 n/a (libglib-2.0.so.0)
#2 0x00007f0881ba0d82 g_main_loop_run (libglib-2.0.so.0)
#3 0x00007f0882188656 n/a (libgio-2.0.so.0)
#4 0x00007f0881bc83d5 n/a (libglib-2.0.so.0)
#5 0x00007f0880eed494 start_thread (libpthread.so.0)
#6 0x00007f0880c2faff __clone (libc.so.6)
Stack trace of thread 1430:
#0 0x00007f0880c266ad poll (libc.so.6)
#1 0x00007f0881ba09f6 n/a (libglib-2.0.so.0)
#2 0x00007f0881ba0b0c g_main_context_iteration
(libglib-2.0.so.0)
#3 0x00007f0881ba0b51 n/a (libglib-2.0.so.0)
#4 0x00007f0881bc83d5 n/a (libglib-2.0.so.0)
#5 0x00007f0880eed494 start_thread (libpthread.so.0)
#6 0x00007f0880c2faff __clone (libc.so.6)
Stack trace of thread 1432:
#0 0x00007f0880c266ad poll (libc.so.6)
#1 0x00007f0881ba09f6 n/a (libglib-2.0.so.0)
#2 0x00007f0881ba0b0c g_main_context_iteration
(libglib-2.0.so.0)
#3 0x00007f0873dfa46d n/a (libdconfsettings.so)
#4 0x00007f0881bc83d5 n/a (libglib-2.0.so.0)
#5 0x00007f0880eed494 start_thread (libpthread.so.0)
#6 0x00007f0880c2faff __clone (libc.so.6)
GNU gdb (Debian 7.12-6) 7.12.0.20161007-git
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Reading symbols from /usr/bin/mate-panel...(no debugging symbols found)...done.
[New LWP 1425]
[New LWP 1431]
[New LWP 1430]
[New LWP 1432]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `mate-panel'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x00007f0883f37823 in gtk_drag_finish () from
/usr/lib/x86_64-linux-gnu/libgtk-3.so.0
[Current thread is 1 (Thread 0x7f08856a5f00 (LWP 1425))]
