title: Crashed: com.apple.root.utility-qos EXC_BAD_ACCESS KERN_INVALID_ADDRESS
body: <p>I'm getting following crash. Can't figure out what to look for. Is it related to qos?</p>
  
  <blockquote>
    <p>Crashed: com.apple.root.utility-qos
    EXC_BAD_ACCESS KERN_INVALID_ADDRESS 0x0000000000000020
    Crashed: com.apple.root.utility-qos</p>
  </blockquote>
  
  <p><a href="https://i.stack.imgur.com/MhIoI.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/MhIoI.png" alt="enter image description here"></a></p>
  
  <p>If it's related to qos then I've only following code in my project. Can this code be causing this crash? If this is the culprit then how to fix it?</p>
  
  <pre><code>DispatchQueue.global(qos: .userInitiated).async { [weak self] in
      guard let _ = self else {
          return
      }
      updateStatusToOnline()
  }
  </code></pre>