title: Xcode 10 autocomplete not working in other swift file
body: <p><strong>Xcode Version 10.0 (10A255)</strong></p>
  
  <p>I have a struct in MyStruct.swift</p>
  
  <pre><code>struct MyStruct {
    var aa = ""
    var bb = ""
  }
  </code></pre>
  
  <p>In MyStruct.swift autocomplete it's working.</p>
  
  <p><a href="https://i.stack.imgur.com/rlIHO.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/rlIHO.png" alt="enter image description here"></a></p>
  
  <p>In other file it's not working.</p>
  
  <p><a href="https://i.stack.imgur.com/2R4Zj.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/2R4Zj.png" alt="enter image description here"></a></p>
  
  <p>I try deleting derivedData, it's not working too :(</p>