title: Why `Cannot read property '@@transducer/step' of null`?
body: <p>I'm diving into ramdajs and refactoring some react code here. It might not necessary to do it in this case but for the sake of exercise I want to refactor this ternary code but get an error.</p>
  
  <pre><code>{!this.state.repos ? &lt;Loader /&gt; : &lt;ReposGrid repos={this.state.repos} /&gt;}
  
  // refactoring to:
  
  {R.ifElse(R.isEmpty, R.always(Loader), ReposGrid)(this.state.repos)}
  </code></pre>
  
  <p>This gives me an error <code>Cannot read property '@@transducer/step' of null</code></p>
  
  <pre><code>const ReposGrid = R.pipe(
      R.tap(console.log)
      R.prop("repos"),
      R.map(Repo),
      ReposWraper
  )
  </code></pre>