UISearchBar and UISearchDisplayController on iOS8 beta5 crash

Hi all. This crash only happens on iOS8.

Summary: I am using UISearchBar and UISearchDisplayController in my view controller and when I first click on the input text input line it works and the search bar shows the result and resigns from the first responder. But when I click on the search bar again, the app crashes.

Steps to play: 1. Click on UISearchBar 2.Input text 3. Show search result 4. Click on UISearchBar 5.crash