_g_log_abort () at /build/buildd/glib2.0-2.39.1/./glib/gmessages.c:281
g_assertion_message (domain=domain@entry=0x7fdde0288d86 "Gdk", file=file@entry=0x7fdde0293438 "/build/buildd/gtk+3.0-3.8.7/./gdk/x11/gdkdevicemanager-xi2.c", line=line@entry=789, func=func@entry=0x7fdde02936b0 <__FUNCTION__.34821> "translate_crossing_mode", message=message@entry=0x1cade40 "code should not be reached") at /build/buildd/glib2.0-2.39.1/./glib/gtestutils.c:2278
g_assertion_message_expr (domain=domain@entry=0x7fdde0288d86 "Gdk", file=file@entry=0x7fdde0293438 "/build/buildd/gtk+3.0-3.8.7/./gdk/x11/gdkdevicemanager-xi2.c", line=line@entry=789, func=func@entry=0x7fdde02936b0 <__FUNCTION__.34821> "translate_crossing_mode", expr=expr@entry=0x0) at /build/buildd/glib2.0-2.39.1/./glib/gtestutils.c:2293
translate_crossing_mode (mode=<optimized out>) at /build/buildd/gtk+3.0-3.8.7/./gdk/x11/gdkdevicemanager-xi2.c:789
gdk_x11_device_manager_xi2_translate_event (translator=<optimized out>, display=0x184d020, event=0x7fddc0011870, xevent=0x7fff5648bb00) at /build/buildd/gtk+3.0-3.8.7/./gdk/x11/gdkdevicemanager-xi2.c:1580