vala applet crash

Reading symbols from /usr/lib/mate-panel/appmenu-mate...(no debugging symbols found)...done.
(gdb) run
Starting program: /usr/lib/mate-panel/appmenu-mate
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[New Thread 0x7fffebd6d700 (LWP 15708)]
[New Thread 0x7fffeb56c700 (LWP 15709)]
[New Thread 0x7fffead6b700 (LWP 15710)]
[New Thread 0x7fffe9f9d700 (LWP 15711)]

(appmenu-mate:15702): Gtk-WARNING **: Negative content height -1 (allocation 1, extents 1x1) while allocating gadget (node menuitem, owner GtkModelMenuItem)


[Thread 0x7fffe9f9d700 (LWP 15711) exited]


Thread 1 "appmenu-mate" received signal SIGSEGV, Segmentation fault.
0x000055555556b4bc in ?? ()
(gdb) bt
#0  0x000055555556b4bc in  ()
#1  0x00007ffff6bd8f75 in g_object_unref () at /usr/lib/libgobject-2.0.so.0
#2  0x00007ffff7730b22 in  () at /usr/lib/libgtk-3.so.0
#3  0x00007ffff7624401 in  () at /usr/lib/libgtk-3.so.0
#4  0x00007ffff6bd3c5d in g_closure_invoke () at /usr/lib/libgobject-2.0.so.0
#5  0x00007ffff6be7ccb in  () at /usr/lib/libgobject-2.0.so.0
#6  0x00007ffff6bf0806 in g_signal_emit_valist () at /usr/lib/libgobject-2.0.so.0
#7  0x00007ffff6bf1240 in g_signal_emit () at /usr/lib/libgobject-2.0.so.0
#8  0x00007ffff784ef5e in  () at /usr/lib/libgtk-3.so.0
#9  0x00007ffff6bda849 in g_object_run_dispose () at /usr/lib/libgobject-2.0.so.0
#10 0x0000555555560850 in  ()
#11 0x00007ffff19491c8 in ffi_call_unix64 () at /usr/lib/libffi.so.6
#12 0x00007ffff1948c2a in ffi_call () at /usr/lib/libffi.so.6
#13 0x00007ffff6bd486f in g_cclosure_marshal_generic_va () at /usr/lib/libgobject-2.0.so.0
#14 0x00007ffff6bd3ea6 in  () at /usr/lib/libgobject-2.0.so.0
#15 0x00007ffff6bf0af9 in g_signal_emit_valist () at /usr/lib/libgobject-2.0.so.0
#16 0x00007ffff6bf1240 in g_signal_emit () at /usr/lib/libgobject-2.0.so.0
#17 0x00007ffff6475394 in  () at /usr/lib/libbamf3.so.2
#18 0x00007ffff19491c8 in ffi_call_unix64 () at /usr/lib/libffi.so.6
#19 0x00007ffff1948c2a in ffi_call () at /usr/lib/libffi.so.6
#20 0x00007ffff6bd4483 in g_cclosure_marshal_generic () at /usr/lib/libgobject-2.0.so.0
#21 0x00007ffff6bd3c5d in g_closure_invoke () at /usr/lib/libgobject-2.0.so.0
---Type <return> to continue, or q <return> to quit---
#22 0x00007ffff6be7b50 in  () at /usr/lib/libgobject-2.0.so.0
#23 0x00007ffff6befc14 in g_signal_emitv () at /usr/lib/libgobject-2.0.so.0
#24 0x00007ffff647dfcf in  () at /usr/lib/libbamf3.so.2
#25 0x00007ffff19491c8 in ffi_call_unix64 () at /usr/lib/libffi.so.6
#26 0x00007ffff1948c2a in ffi_call () at /usr/lib/libffi.so.6
#27 0x00007ffff6bd4483 in g_cclosure_marshal_generic () at /usr/lib/libgobject-2.0.so.0
#28 0x00007ffff6bd3c5d in g_closure_invoke () at /usr/lib/libgobject-2.0.so.0
#29 0x00007ffff6be75aa in  () at /usr/lib/libgobject-2.0.so.0
#30 0x00007ffff6bf0806 in g_signal_emit_valist () at /usr/lib/libgobject-2.0.so.0
#31 0x00007ffff6bf1240 in g_signal_emit () at /usr/lib/libgobject-2.0.so.0
#32 0x00007ffff6eea6e7 in  () at /usr/lib/libgio-2.0.so.0
#33 0x00007ffff6ed9119 in  () at /usr/lib/libgio-2.0.so.0
#34 0x00007ffff68f9d06 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#35 0x00007ffff68fa0e1 in  () at /usr/lib/libglib-2.0.so.0
#36 0x00007ffff68fa412 in g_main_loop_run () at /usr/lib/libglib-2.0.so.0
#37 0x00007ffff76f050f in gtk_main () at /usr/lib/libgtk-3.so.0
#38 0x00007ffff66a8e20 in mate_panel_applet_factory_main () at /usr/lib/libmate-panel-applet-4.so.1
#39 0x000055555556018f in _vala_main ()
#40 0x000055555555fef0 in main ()
(gdb)