Ticket #37369: meta.patch

wp-includes/meta.php

@@ -1131 +1131 @@
                 return false;
         }
 
-        // Only specific core object types are supported.
         if ( ! wp_object_type_exists( $object_type ) ) {
-                return new WP_Error( 'invalid_meta_key', __( 'Invalid meta key. Not a core object type.' ) );
+                return false;
         }
 
         if ( ! isset( $wp_meta_keys[ $object_type ] ) ) {
@@ -1165 +1164 @@
 function unregister_meta_key( $object_type, $object_subtype, $meta_key ) {
         global $wp_meta_keys;
 
+        // Only specific core object types are supported.
+        if ( ! wp_object_type_exists( $object_type ) ) {
+                return new WP_Error( 'invalid_meta_key', __( 'Invalid meta key. Not a core object type.' ) );
+        }
+
         if ( ! registered_meta_key_exists( $object_type, $object_subtype, $meta_key ) ) {
                 return new WP_Error( 'invalid_meta_key', __( 'Invalid meta key' ) );
         }