Issue #3485290: Fix array_merge for empty bundles in field storage data in Derive for each property

Closes #3485290

src/Plugin/Derivative/EntityFieldSourceDeriverBase.php

@@ -134,7 +134,7 @@ abstract class EntityFieldSourceDeriverBase extends DeriverBase implements Conta
       $is_base = (in_array($field_name, $entityFieldsClassification["fields_base"]) || ($field_storage_definition instanceof BaseFieldDefinition));
       $returned[$field_name] = [
         "label" => $field_storage_definition->getLabel(),
-        "bundles" => array_values($field_info['bundles']),
+        "bundles" => array_values($field_info['bundles'] ?? []),
         "metadata" => [
           "configurable" => ($field_storage_definition instanceof FieldStorageConfig),
           "editorial" => in_array($field_name, $entityFieldsClassification["fields_editorial"]),
@@ -437,7 +437,7 @@ abstract class EntityFieldSourceDeriverBase extends DeriverBase implements Conta
       $bundle_context_for_properties = (new ContextDefinition('string'))
         ->setRequired()
         ->setLabel("Bundle")
-        ->addConstraint('AllowedValues', array_merge($field_storage_data["bundles"], [""]));
+        ->addConstraint('AllowedValues', array_merge($field_storage_data["bundles"] ?? [], [""]));
       foreach ($field_storage_data["properties"] as $property_id => $property_data) {
         $base_plugin_derivative = array_merge($base_plugin_definition, [
           'label' => $property_data["label"],