Fixes #9255: xml parsing error in $.parseXML is now properly detected for all...

Fixes #9255: xml parsing error in $.parseXML is now properly detected for all browsers. Unit test added.

src/core.js

@@ -553,9 +553,9 @@ jQuery.extend({
 	},
 
 	// Cross-browser xml parsing
-	// (xml & tmp used internally)
-	parseXML: function( data , xml , tmp ) {
-
+	parseXML: function( data ) {
+		var xml, tmp;
+		try {
 			if ( window.DOMParser ) { // Standard
 				tmp = new DOMParser();
 				xml = tmp.parseFromString( data , "text/xml" );
@@ -564,13 +564,12 @@ jQuery.extend({
 				xml.async = "false";
 				xml.loadXML( data );
 			}
-
-		tmp = xml.documentElement;
-
-		if ( ! tmp || ! tmp.nodeName || tmp.nodeName === "parsererror" ) {
+		} catch( e ) {
+			xml = undefined;
+		}
+		if ( !xml || !xml.documentElement || xml.getElementsByTagName( "parsererror" ).length ) {
 			jQuery.error( "Invalid XML: " + data );
 		}
-
 		return xml;
 	},
 

test/unit/core.js

@@ -984,6 +984,26 @@ test("jQuery.parseJSON", function(){
 	}
 });
 
+test("jQuery.parseXML", 4, function(){
+	var xml, tmp;
+	try {
+		xml = jQuery.parseXML( "<p>A <b>well-formed</b> xml string</p>" );
+		tmp = xml.getElementsByTagName( "p" )[ 0 ];
+		ok( !!tmp, "<p> present in document" );
+		tmp = tmp.getElementsByTagName( "b" )[ 0 ];
+		ok( !!tmp, "<b> present in document" );
+		strictEqual( tmp.childNodes[ 0 ].nodeValue, "well-formed", "<b> text is as expected" );
+	} catch (e) {
+		strictEqual( e, undefined, "unexpected error" );
+	}
+	try {
+		xml = jQuery.parseXML( "<p>Not a <<b>well-formed</b> xml string</p>" );
+		ok( false, "invalid xml not detected" );
+	} catch( e ) {
+		strictEqual( e, "Invalid XML: <p>Not a <<b>well-formed</b> xml string</p>", "invalid xml detected" );
+	}
+});
+
 test("jQuery.sub() - Static Methods", function(){
     expect(18);
     var Subclass = jQuery.sub();