Fix crash caused by input configuration dialog

editor/settings/input_event_configuration_dialog.cpp

@@ -49,7 +49,7 @@ void InputEventConfigurationDialog::_set_event(const Ref<InputEvent> &p_event, c
 			Ref<InputEventKey> current_key = p_event;
 			// Without this is_visible() check, the gui would not open if the already bound
 			// keybind was escape.
-			if (is_visible()) {
+			if (current_key.is_valid() && is_visible()) {
 				if (current_key->get_physical_keycode() == Key::ENTER) {
 					_ok_pressed();
 					return;