title: App crashes with reason Assertion failure in void PushNextClassForSettingIMP(id, SEL)() in >= iOS 9.3.1
body: <p>App crashing with the below reason when we set backgroundColor or font to UILabel
  Below is the crash log</p>
  
  <pre><code>*** Assertion failure in void PushNextClassForSettingIMP(id, SEL)(), /BuildRoot/Library/Caches/com.apple.xbs/Sources/UIKit_Sim/UIKit-3505.16/UIAppearance.m:757
  *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Please file a radar on UIKit if you see this assertion.'
  </code></pre>
  
  <p>This started happening in iOS 9.3.1</p>
  
  <p>This crashing for the below line.</p>
  
  <pre><code>[self setBackgroundColor:[UIColor whiteColor]];
  </code></pre>
  
  <p>Please find the attached crash screenshot<a href="https://i.stack.imgur.com/oqT3l.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/oqT3l.png" alt="Crash Log"></a></p>
  
  <p>Below is the crash screenshot
  <a href="https://i.stack.imgur.com/3eq9C.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/3eq9C.png" alt="Crash"></a></p>