From 6e57d096cca533ccf255d93bfa1aa04dbb605bab Mon Sep 17 00:00:00 2001
From: Chris Rebert <code@rebertia.com>
Date: Tue, 11 Mar 2014 17:30:49 -0700
Subject: [PATCH] clone ruleset before passing it to applyEmbeddedRuleset;
 fixes #458

since applyEmbeddedRuleset modifies the ruleset in-place,
this ensures that those modifications aren't visible to the caller
---
 src/core/CSSLint.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/core/CSSLint.js b/src/core/CSSLint.js
index 61e41706..9c4f84ba 100644
--- a/src/core/CSSLint.js
+++ b/src/core/CSSLint.js
@@ -5,7 +5,7 @@
  * @extends parserlib.util.EventTarget
  */
 
-/* global parserlib, Reporter */
+/* global parserlib, clone, Reporter */
 /* exported CSSLint */
 
 var CSSLint = (function(){
@@ -189,6 +189,8 @@ var CSSLint = (function(){
         }
 
         if (embeddedRuleset.test(text)){
+            //defensively copy so that caller's version does not get modified
+            ruleset = clone(ruleset);
             ruleset = applyEmbeddedRuleset(text, ruleset);
         }