title: Xcode 4.2 debug doesn't symbolicate stack call
body: <p>I have a problem with Xcode 4.2 debugging in an iOS 5 simulator/device. The following code crashes, as expected:</p>
  
  <pre><code>NSArray *arr=[NSArray array];
  [arr objectAtIndex:100];
  </code></pre>
  
  <p>In iOS 4, I get a useful stack trace of hex numbers. But in iOS 5, it just gives me:</p>
  
  <pre><code>*** First throw call stack:
  (0x16b4052 0x1845d0a 0x16a0674 0x294c 0x6f89d6 0x6f98a6 0x708743 0x7091f8 0x7fcaa9 0x2257fa9 0x16881c5 0x15ed022 0x15eb90a 0x15eadb4 0x15eaccb 0x6f02a7 0x6faa93 0x2889 0x2805)
  </code></pre>
  
  <p>Thanks.</p>