Reworks how values of parameters passed to error callbacks are determined. Fixes #8050.

src/ajax.js

@@ -400,8 +400,9 @@ jQuery.extend({
 
 				// Cancel the request
 				abort: function( statusText ) {
+					statusText = statusText || "abort";
 					if ( transport ) {
-						transport.abort( statusText || "abort" );
+						transport.abort( statusText );
 					}
 					done( 0, statusText );
 					return this;
@@ -438,7 +439,7 @@ jQuery.extend({
 
 			var isSuccess,
 				success,
-				error = ( statusText = statusText || "error" ),
+				error,
 				response = responses ? ajaxHandleResponses( s, jXHR, responses ) : undefined,
 				lastModified,
 				etag;
@@ -476,6 +477,16 @@ jQuery.extend({
 						error = "" + e;
 					}
 				}
+			} else {
+				// We extract error from statusText
+				// then normalize statusText and status for non-aborts
+				error = statusText;
+				if( status ) {
+					statusText = "error";
+					if ( status < 0 ) {
+						status = 0;
+					}
+				}
 			}
 
 			// Set data for the fake xhr object
@@ -634,7 +645,7 @@ jQuery.extend({
 
 			// If no transport, we auto-abort
 			if ( !transport ) {
-				done( 0, "notransport" );
+				done( -1, "No Transport" );
 			} else {
 				// Set state as sending
 				state = jXHR.readyState = 1;
@@ -653,9 +664,8 @@ jQuery.extend({
 					transport.send( requestHeaders, done );
 				} catch (e) {
 					// Propagate exception as error if not done
-					if ( status === 1 ) {
-						done( 0, "error", "" + e );
-						jXHR = false;
+					if ( status < 2 ) {
+						done( -1, "" + e );
 					// Simply rethrow otherwise
 					} else {
 						jQuery.error( e );

src/ajax/xhr.js

@@ -108,12 +108,9 @@ if ( jQuery.support.ajax ) {
 					} catch( _ ) {}
 
 					// Do send the request
-					try {
-						xhr.send( ( s.hasContent && s.data ) || null );
-					} catch( e ) {
-						complete( 0, "error", "" + e );
-						return;
-					}
+					// This may raise an exception which is actually
+					// handled in jQuery.ajax (so no try/catch here)
+					xhr.send( ( s.hasContent && s.data ) || null );
 
 					// Listener
 					callback = function( _, isAbort ) {

test/unit/ajax.js

@@ -240,6 +240,47 @@ test("jQuery.ajax() - error callbacks", function() {
 	});
 });
 
+test("jQuery.ajax() - textStatus and errorThrown values", function() {
+
+	var nb = 3;
+
+	expect( 2 * nb );
+	stop();
+
+	function startN() {
+		if ( !( --nb ) ) {
+			start();
+		}
+	}
+
+	jQuery.ajax({
+		url: url("data/nonExistingURL"),
+		error: function( _ , textStatus , errorThrown ){
+			strictEqual( textStatus, "error", "textStatus is 'error' for 404" );
+			strictEqual( errorThrown, "Not Found", "errorThrown is 'Not Found' for 404");
+			startN();
+		}
+	});
+
+	jQuery.ajax({
+		url: url("data/name.php?wait=5"),
+		error: function( _ , textStatus , errorThrown ){
+			strictEqual( textStatus, "abort", "textStatus is 'abort' for abort" );
+			strictEqual( errorThrown, "abort", "errorThrown is 'abort' for abort");
+			startN();
+		}
+	}).abort();
+
+	jQuery.ajax({
+		url: url("data/name.php?wait=5"),
+		error: function( _ , textStatus , errorThrown ){
+			strictEqual( textStatus, "mystatus", "textStatus is 'mystatus' for abort('mystatus')" );
+			strictEqual( errorThrown, "mystatus", "errorThrown is 'mystatus' for abort('mystatus')");
+			startN();
+		}
+	}).abort( "mystatus" );
+});
+
 test("jQuery.ajax() - responseText on error", function() {
 
 	expect( 1 );