title: __awaiter is not defined
body: <p>I'm using typescript v 1.8.9 in VSCode, nodejs 5.9.1 i have my file app.ts that has these lines</p>
  
  <pre><code>import {XController} from "./XController";
  
  var xContrller=new XController();
  xContrller.CallAsyncMethod(some args");
  </code></pre>
  
  <p>and XController is a class having async methode CallAsyncMethod</p>
  
  <p>like this </p>
  
  <pre><code>public async CallAsyncMethod(url: string) {
          await this.request.post(url);
  }
  </code></pre>
  
  <p>this translates to __awaiter(void,...) in javascript but it crashes saying that __awaiter is not defined ??? any clues why this is happening and how to fix it.</p>
  
  <p>Thanks</p>