--- jsobject.py 2024-02-28 23:53:51.051343480 +0800
+++ jsobject.py     2024-02-29 21:46:33.318981819 +0800
@@ -49,7 +49,7 @@
             raise MakeError(
                 'TypeError',
                 'Object.getOwnPropertyDescriptor called on non-object')
-        return obj.own.keys()
+        return list(obj.own.keys())
 
     def create(obj):
         if not (obj.is_object() or obj.is_null()):