Ticket #28319: 28319.3.diff

src/wp-includes/class-wp-error.php

@@ -63 +63 @@
 
                 if ( ! empty($data) )
                         $this->error_data[$code] = $data;
+
+                /**
+                 * Fires when a WP_Error object instance is created.
+                 *
+                 * @since 4.0.0
+                 *
+                 * @param WP_Error $this The WP_Error instance.
+                 */
+                do_action( 'create_wp_error', $this );
         }
 
         /**