From 17a26f5bd9b14225248942b876e96545b4c21fb6 Mon Sep 17 00:00:00 2001
From: Timmy Willison <timmywillisn@gmail.com>
Date: Wed, 25 Jul 2012 16:05:48 -0400
Subject: [PATCH] Fail silently if closest is somehow called on a document.
 Fixes #10726.

---
 src/traversing.js       | 5 +----
 test/unit/traversing.js | 5 ++++-
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/traversing.js b/src/traversing.js
index 321c25197..baac0399e 100644
--- a/src/traversing.js
+++ b/src/traversing.js
@@ -92,16 +92,13 @@ jQuery.fn.extend({
 		for ( ; i < l; i++ ) {
 			cur = this[i];
 
-			while ( cur ) {
+			while ( cur && cur.ownerDocument && cur !== context && cur.nodeType !== 11 ) {
 				if ( pos ? pos.index(cur) > -1 : jQuery.find.matchesSelector(cur, selectors) ) {
 					ret.push( cur );
 					break;
 
 				} else {
 					cur = cur.parentNode;
-					if ( !cur || !cur.ownerDocument || cur === context || cur.nodeType === 11 ) {
-						break;
-					}
 				}
 			}
 		}
diff --git a/test/unit/traversing.js b/test/unit/traversing.js
index 2712e7f2f..7f9678307 100644
--- a/test/unit/traversing.js
+++ b/test/unit/traversing.js
@@ -275,7 +275,8 @@ test("filter() with positional selectors", function() {
 });
 
 test("closest()", function() {
-	expect(13);
+	expect( 14 );
+
 	deepEqual( jQuery("body").closest("body").get(), q("body"), "closest(body)" );
 	deepEqual( jQuery("body").closest("html").get(), q("html"), "closest(html)" );
 	deepEqual( jQuery("body").closest("div").get(), [], "closest(div)" );
@@ -299,6 +300,8 @@ test("closest()", function() {
 	// Bug #7369
 	equal( jQuery("<div foo='bar'></div>").closest("[foo]").length, 1, "Disconnected nodes with attribute selector" );
 	equal( jQuery("<div>text</div>").closest("[lang]").length, 0, "Disconnected nodes with text and non-existent attribute selector" );
+
+	ok( !jQuery(document).closest("#foo").length, "Calling closest on a document fails silently" );
 });
 
 test("closest(jQuery)", function() {
-- 
2.39.5