Version-Release number of selected component:
mate-media-1.20.0-1.fc28

Additional info:
reporter:       libreport-2.9.5
backtrace_rating: 4
cmdline:        mate-volume-control-applet
crash_function: _gtk_gesture_get_pointer_emulating_sequence
executable:     /usr/bin/mate-volume-control-applet
journald_cursor: s=50375bfd19704376a47321ac71d6d962;i=17214;b=e9db9bc2341443df9a27ba32a9013987;m=41230c5d;t=56c02efc5d299;x=2c5646642e2a5ee2
kernel:         4.16.3-301.fc28.x86_64
rootdir:        /
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 _gtk_gesture_get_pointer_emulating_sequence at gtkgesture.c:1811
 #1 _gtk_widget_get_emulating_sequence at gtkwidget.c:4183
 #2 _gtk_widget_set_sequence_state_internal at gtkwidget.c:4245
 #3 event_controller_sequence_state_changed at gtkwidget.c:17330
 #4 ffi_call_unix64 at ../src/x86/unix64.S:76
 #5 ffi_call at ../src/x86/ffi64.c:525
 #6 g_cclosure_marshal_generic at gclosure.c:1490
 #11 gtk_gesture_set_sequence_state at gtkgesture.c:1160
 #12 _gtk_gesture_update_point at gtkgesture.c:603
 #13 gtk_gesture_handle_event at gtkgesture.c:740