Ticket #4589: 4589.patch

core/tools.js

@@ -80 +80 @@
                                 || ( obj instanceof String )
                                 || ( obj instanceof Number )
                                 || ( obj instanceof Boolean )
-                                || ( obj instanceof Date ) )
+                                || ( obj instanceof Date )
+                                || ( obj instanceof RegExp ) )
                         {
                                 return obj;
                         }