title: Redux Saga wierd behavior on Join effect
body: <pre><code>const tasks = yield [fork(method1), fork(method2)]
  </code></pre>
  
  <p><strong>Working</strong> </p>
  
  <p><code>yield tasks.map(task =&gt; join(task))</code></p>
  
  <p><strong>Not working and showing error</strong> <em>argument 0 is not a valid Task object</em>  </p>
  
  <p><code>yield tasks.map(join)</code></p>
  
  <p>Any body has idea why it is not working. I am using Babel ES6 transpiler so this issue might be related to transpiler thing.</p>