title: UITextView copy text from attributedText cause app crash
body: <p>I'm using an UITextView with a Lorem Ipsum text in it. I'm just highlight some of the text with bold and different kind of font, so I'm using <code>attributedText</code> property.</p>
  
  <p><strong>Problem</strong></p>
  
  <p>So, I'm using <code>attributedText</code> and on tap in the textView a popup up appears to select text. When I press copy button the app totally crashes without any crash report or exception.</p>
  
  <p>In this picture I had already pressed the copy button, and the app is crashed.</p>
  
  <p><img src="https://i.stack.imgur.com/s4olY.png" alt="enter image description here"></p>