title: iPhone app crash randomly with signal 9
body: <p>I have an app which crashes randomly on different scenario and logs is as follows</p>
  
  <pre><code>Mon Jul 16 22:00:39 unknown com.apple.launchd[1] &lt;Notice&gt;: (UIKitApplication:com.apple.mobilemail[0x55fb]) Exited: Killed
  Mon Jul 16 22:00:39 unknown com.apple.launchd[1] &lt;Notice&gt;: (UIKitApplication:com.apple.mobilephone[0xa13c]) Exited: Killed
  Mon Jul 16 22:00:39 unknown com.apple.launchd[1] &lt;Notice&gt;: (UIKitApplication:com.MyApp.app[0x137]) Exited: Killed
  Mon Jul 16 22:00:39 unknown com.apple.launchd[1] &lt;Notice&gt;: (com.apple.accessoryd) Exited: Killed
  Mon Jul 16 22:00:41 unknown SpringBoard[29] &lt;Warning&gt;: Application 'Mail' exited abnormally with signal 9: Killed
  Mon Jul 16 22:00:41 unknown SpringBoard[29] &lt;Warning&gt;: Memory level is not normal (15%). Delaying auto-relaunch of 'Mail' for 30 seconds.
  Mon Jul 16 22:00:41 unknown SpringBoard[29] &lt;Warning&gt;: Application 'app' exited abnormally with signal 9: Killed
  Mon Jul 16 22:00:42 unknown SpringBoard[29] &lt;Warning&gt;: Application 'Phone' exited abnormally with signal 9: Killed
  </code></pre>