Bug 4366; fixing $.each(document.styleSheets) from throwing errors in IE

2 files changed, 13 insertions, 3 deletions

diff --git a/src/core.js b/src/core.js
index 9312ee288..1b06913c3 100644
--- a/src/core.js
+++ b/src/core.js
@@ -610,8 +610,11 @@ jQuery.extend({
 					}
 				}
 			} else {
-				for ( var value = object[0];
-					i < length && callback.call( value, i, value ) !== false; value = object[++i] ) {}
+				for ( ; i < length; ) {
+					if ( callback.call( object[ i ], i,  object[ i++ ] ) === false ) {
+						break;
+					}
+				}
 			}
 		}
 
diff --git a/test/unit/core.js b/test/unit/core.js
index 6ee8724de..39b7d275c 100644
--- a/test/unit/core.js
+++ b/test/unit/core.js
@@ -784,7 +784,7 @@ test("jQuery.extend(Object, Object)", function() {
 });
 
 test("jQuery.each(Object,Function)", function() {
-	expect(13);
+	expect(14);
 	jQuery.each( [0,1,2], function(i, n){
 		equals( i, n, "Check array iteration" );
 	});
@@ -816,6 +816,13 @@ test("jQuery.each(Object,Function)", function() {
 		f[i] = 'baz';
 	});
 	equals( "baz", f.foo, "Loop over a function" );
+	
+	var stylesheet_count = 0;
+	jQuery.each(document.styleSheets, function(i){
+		stylesheet_count++;
+	});
+	equals(stylesheet_count, 2, "should not throw an error in IE while looping over document.styleSheets and return proper amount");
+
 });
 
 test("jQuery.makeArray", function(){