Bug 7587; Enhancement/1.6 Feature: Bypass regexp filter on $.parseJSO…

…N and use native thrown exceptions if window.JSON.parse is available

src/core.js

@@ -515,16 +515,18 @@ jQuery.extend({
 		// Make sure leading/trailing whitespace is removed (IE can't handle it)
 		data = jQuery.trim( data );
 
+		// Attempt to parse using the native JSON parser first
+		if ( window.JSON && window.JSON.parse ) {
+			return window.JSON.parse( data );
+		}
+
 		// Make sure the incoming data is actual JSON
 		// Logic borrowed from http://json.org/json2.js
-		if ( rvalidchars.test(data.replace(rvalidescape, "@")
-			.replace(rvalidtokens, "]")
-			.replace(rvalidbraces, "")) ) {
-
-			// Try to use the native JSON parser first
-			return window.JSON && window.JSON.parse ?
-				window.JSON.parse( data ) :
-				(new Function("return " + data))();
+		if ( rvalidchars.test( data.replace( rvalidescape, "@" )
+			.replace( rvalidtokens, "]" )
+			.replace( rvalidbraces, "")) ) {
+
+			return (new Function( "return " + data ))();
 
 		} else {
 			jQuery.error( "Invalid JSON: " + data );

test/unit/ajax.js

@@ -1600,7 +1600,7 @@ test("jQuery.ajax() - malformed JSON", function() {
 		},
 		error: function(xhr, msg, detailedMsg) {
 			equals( "parsererror", msg, "A parse error occurred." );
-			ok( /^Invalid JSON/.test(detailedMsg), "Detailed parsererror message provided" );
+			ok( /^(Invalid|SyntaxError|exception)/i.test(detailedMsg), "Detailed parsererror message provided" );
 	  		start();
 		}
 	});