From b47f505588f37077153d5e0eb41397bb571b801c Mon Sep 17 00:00:00 2001
From: Jermolene <jeremy@jermolene.com>
Date: Fri, 5 Feb 2016 17:39:02 +0000
Subject: [PATCH] Freeze the entire tiddler object

As seen in the first pass of #2247, it was previously inadvertently
possible for callers to modify the tiddler object itself by adding and
replacing properties.
---
 boot/boot.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/boot/boot.js b/boot/boot.js
index 62b85cffc..1a41b4d07 100644
--- a/boot/boot.js
+++ b/boot/boot.js
@@ -812,6 +812,7 @@ $tw.Tiddler = function(/* [fields,] fields */) {
 	}
 	// Freeze the tiddler against modification
 	Object.freeze(this.fields);
+	Object.freeze(this);
 };
 
 $tw.Tiddler.prototype.hasField = function(field) {