Issue #2707689: NodeForm::actions() checks for delete access on new entities

core/lib/Drupal/Core/Field/Plugin/Field/FieldType/EntityReferenceItem.php

@@ -6,6 +6,7 @@
 use Drupal\Component\Utility\NestedArray;
 use Drupal\Core\Entity\ContentEntityStorageInterface;
 use Drupal\Core\Entity\EntityInterface;
+use Drupal\Component\Plugin\Exception\PluginNotFoundException;
 use Drupal\Core\Entity\EntityTypeInterface;
 use Drupal\Core\Entity\FieldableEntityInterface;
 use Drupal\Core\Entity\TypedData\EntityDataDefinition;
@@ -121,7 +122,16 @@ public static function mainPropertyName() {
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
     $target_type = $field_definition->getSetting('target_type');
-    $target_type_info = \Drupal::entityTypeManager()->getDefinition($target_type);
+    try {
+      $target_type_info = \Drupal::entityTypeManager()->getDefinition($target_type);
+    }
+    catch (PluginNotFoundException $e) {
+      throw new FieldException(sprintf("Field '%s' on entity type '%s' references a target entity type '%s' which does not exist.",
+        $field_definition->getName(),
+        $field_definition->getTargetEntityTypeId(),
+        $target_type
+      ));
+    }
     $properties = static::propertyDefinitions($field_definition)['target_id'];
     if ($target_type_info->entityClassImplements(FieldableEntityInterface::class) && $properties->getDataType() === 'integer') {
       $columns = [