initial sync*, part of #221

lib/runtime/dart/isolate.js

 dart_library.library('dart/isolate', null, /* Imports */[
   "dart_runtime/dart",
   'dart/core',
   'dart/async'
 ], /* Lazy imports */[
   'dart/_isolate_helper'
 ], function(exports, dart, core, async, _isolate_helper) {
   'use strict';
   let dartx = dart.dartx;
   class Capability extends core.Object {
@@ skipping 122 matching lines @@
     }
     removeErrorListener(port) {
       let message = core.List.new(2);
       message[dartx.set](0, "stopErrors");
       message[dartx.set](1, port);
       this.controlPort.send(message);
     }
     get errors() {
       let controller = null;
       let port = null;
-      let handleError = message => {
+      function handleError(message) {
         let errorDescription = dart.as(dart.dindex(message, 0), core.String);
         let stackDescription = dart.as(dart.dindex(message, 1), core.String);
         let error = new RemoteError(errorDescription, stackDescription);
         controller.addError(error, error.stackTrace);
-      };
+      }
       dart.fn(handleError, dart.void, [dart.dynamic]);
       controller = async.StreamController.broadcast({sync: true, onListen: dart.fn(() => {
           port = RawReceivePort.new(handleError);
           this.addErrorListener(port.sendPort);
         }), onCancel: dart.fn(() => {
           this.removeErrorListener(port.sendPort);
           port.close();
           port = null;
         })});
       return controller.stream;
@@ skipping 97 matching lines @@
   });
   // Exports:
   exports.Capability = Capability;
   exports.IsolateSpawnException = IsolateSpawnException;
   exports.Isolate = Isolate;
   exports.SendPort = SendPort;
   exports.ReceivePort = ReceivePort;
   exports.RawReceivePort = RawReceivePort;
   exports.RemoteError = RemoteError;
 });