title: iOS app crashing with the following error:Cannot form weak reference to instance of class UICompatibilityInputViewController
body: <p>my iOS app in objective c is crashing due to the following error in Xcode 8 and Xcode 9.</p>
  
  <p>error:</p>
  
  <blockquote>
    <p>Cannot form weak reference to instance (0x198bfc00) of class
    UICompatibilityInputViewController. It is possible that this object
    was over-released, or is in the process of deallocation.</p>
  </blockquote>
  
  <p>I am not getting any idea about this crash, pls do help me.
  Thanks in advance.</p>