title: Xcode autocomplete stopped working
body: <p>I am using Xcode 6.1 with a Swift project.</p>
  
  <p>I get the "SourceKit" (iirc) editor crashing issue several times a day but it usually resolves itself and doesn't result in having to close Xcode.</p>
  
  <p>Now the last time it happened it resolved itself but has now taken away all autocompletion calls. Nothing autocompletes, my class functions, UI*, nothing (aside from basic types UInt etc).</p>
  
  <p>I have cleared derived data, removed Xcode and it's related files, re-installed and nothing completes automatically, nor by using the escape key to show suggestions. Autocomplete is definitely checked in preferences as I have been using it for almost a month prior to todays issue.</p>
  
  <p>Has anyone else experienced this? and does anyone have a solution to this problem? Really, really need autocomplete back.</p>
  
  <p>Thanks</p>