title: RxSwift - Playground execution failed: Couldn't lookup symbols
body: <p>I created a new project and used pods to install <code>RxSwift</code>. Then I created a playground and wrote following code :  </p>
  
  <pre><code>import UIKit
  import RxSwift
  import PlaygroundSupport
  
  var name = "hello"
  let names = Variable(["Good"])  
  </code></pre>
  
  <p>But Console shows this error :  </p>
  
  <blockquote>
    <p>Playground execution failed:</p>
    
    <p>error: Couldn't lookup symbols:   __T07RxSwift8VariableCACyxGxcfC<br>
    __T07RxSwift8VariableCMa</p>
  </blockquote>