Functional test

Closes #3247108

src/Plugin/Field/FieldWidget/IpAddressWidgetBase.php

@@ -123,7 +123,12 @@ class IpAddressWidgetBase extends WidgetBase {
     // Convert to storage format.
     foreach ($values as &$item) {
       if (!empty($value = trim($item['value']))) {
-        $value = new IpAddress($value);
+        try {
+          $value = new IpAddress($value);
+        }
+        catch (\Exception $e) {
+          continue;
+        }
 
         $item['ip_start'] = inet_pton($value->start());
         $item['ip_end']   = inet_pton($value->end());