From fc91dd3171bf8880eae949278aa3f389360d71c7 Mon Sep 17 00:00:00 2001
From: Phil Kunz <gitlab@philkunz.com>
Date: Mon, 5 Oct 2020 15:28:29 +0000
Subject: [PATCH] fix(core): update

---
 ts/index.ts | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/ts/index.ts b/ts/index.ts
index 63b7e65..2bdc446 100644
--- a/ts/index.ts
+++ b/ts/index.ts
@@ -49,8 +49,17 @@ export class Smartjson {
    */
   public foldToObject() {
     const newFoldedObject: { [key: string]: any } = {};
+    const trackMap = [];
     for (const keyName of this.saveableProperties) {
-      newFoldedObject[keyName] = plugins.lodashCloneDeep(this[keyName]);
+      let value = this[keyName];
+      if (value instanceof Smartjson) {
+        if (trackMap.includes(value)) {
+          throw new Error('cycle detected');
+        }
+        trackMap.push(value);
+        value = value.foldToObject();
+      }
+      newFoldedObject[keyName] = plugins.lodashCloneDeep(value);
     }
     return newFoldedObject;
   }