Close(destroy) Socket on user-generated write error.

tests/standalone/io/socket_invalid_arguments_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 "dart:io";
 
 import "package:async_helper/async_helper.dart";
 import "package:expect/expect.dart";
 
 class NotAnInteger {
@@ skipping 12 matching lines @@
   Socket.connect(host, port)
       .then((socket) => Expect.fail("Shouldn't get connected"))
       .catchError((e) {
         Expect.isTrue(e is ArgumentError || e is SocketException);
         asyncEnd();
       });
 }
 
 testAdd(buffer) {
   asyncStart();
+  asyncStart();
   ServerSocket.bind("127.0.0.1", 0).then((server) {
     server.listen((socket) => socket.destroy());
     Socket.connect("127.0.0.1", server.port).then((socket) {
       int errors = 0;
-      socket.done.catchError((e) { errors++; });
+      socket.done
+        .catchError((e) { errors++; })
+        .then((_) {
+          Expect.equals(1, errors);
+          asyncEnd();
+          server.close();
+        });
       socket.listen(
           (_) { },
           onError: (error) {
             Expect.fail("Error on stream");
           },
           onDone: () {
-            Expect.equals(1, errors);
-            socket.destroy();
-            server.close();
             asyncEnd();
           });
       socket.add(buffer);
     });
   });
 }
 
 testServerSocketCreation(address, port, backlog) {
   asyncStart();
   var server;
@@ skipping 15 matching lines @@
   testAdd(42);
   // TODO(8233): Throw ArgumentError from API implementation.
   // testAdd([-1]);
   // testAdd([2222222222222222222222222222222]);
   // testAdd([1, 2, 3, null]);
   // testAdd([new NotAnInteger()]);
   testServerSocketCreation(123, 123, 123);
   testServerSocketCreation("string", null, null);
   testServerSocketCreation("string", 123, null);
 }