title: iOS 11 beta 4 presentRenderbuffer crash
body: <p>My app crashes on iOS 11 beta 4 (15A5327g) when [EAGLContext presentRenderbuffer:] method is called. It happens only when I debugging in Xcode. When I launch app manually it doesn't crashed. On versions lower than iOS 11 beta 4 it doesn't crashed as well. How can I prevent this issue? You can see crash details in screenshot</p>
  
  <p><a href="https://i.stack.imgur.com/0IsJm.png" rel="noreferrer"><img src="https://i.stack.imgur.com/0IsJm.png" alt="enter image description here"></a></p>