Create LinkExceptions using the right arguments, in dart:io.

tests/standalone/io/link_test.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import "package:expect/expect.dart";
 import "dart:async";
 import "dart:io";
 import "dart:isolate";
 
 // Test the dart:io Link class.
@@ skipping 155 matching lines @@
         .last)
   .then((_) =>
     // This directory listing must terminate, even though it contains loops.
     new Directory.fromPath(base.append('a/b/c'))
         .list(recursive: true, followLinks: true)
         .last)
   .then((_) =>
     new Directory.fromPath(base).delete(recursive: true));
 }
 
+void testLinkErrorSync() {
+  Expect.throws(() =>
+      new Link('some-dir-that-doent exist/some link file/bla/fisk').createSync(
+          'bla bla bla/b lalal/blfir/sdfred/es'),
+      (e) => e is LinkException);
+}
+
 main() {
   testCreateSync();
   testCreateLoopingLink();
+  testLinkErrorSync();
 }