title: Thread1: signal SIGTERM (in swift) when changing hardware in IOS simulator
body: <p>My swift application is set for certain IOS device, and runs fine in IOS simulator,</p>
  
  <p>However, when changing hardware in IOS simulator, I get the error in swift   Thread1: signal SIGTERM.</p>
  
  <p>I can set swift for IOS device iPhone 6, IOS simulator runs iPhone 6, but can't change to other hardware (such as iPhone 4S).
  I can set swift for IOS device iPhone 4S, and IOS simulator runs fine for iPhone 4S, but get the error when changing hardware (such as iPhone 6 which worked fine before).</p>
  
  <p>Therefore, I am pretty sure the swift application logic is correct.</p>
  
  <p>How can I solve this?</p>