title: How to understand this crash log
body: <p>I got (in ITC) below presented crash report for my first Mac App Store app.
  Using knowledge founded on Stackoverflow I tried to symbolicate this log, but (using atos and otool) I was only able to read last (20) line (which means <code>start (in My App) + 52</code>. 
  I really don't know how to interpret lines above, and how to find cause of crash. </p>
  
  <pre><code>Process:         My App [270]
  Identifier:      com.mycompany.myapp
  Version:         1.0.0 (1.0.0)
  App Item ID:     568750000
  App External ID: 11410000
  Code Type:       X86-64 (Native)
  Parent Process:  launchd [143]
  User ID:         501
  
  Date/Time:       2012-11-07 19:21:11.365 -0200
  OS Version:      Mac OS X 10.8.2 (12C60)
  Report Version:  10
  
  Per-App Interval Since Last Report:  1232 sec
  Per-App Crashes Since Last Report:   1
  
  Crashed Thread:  0  Dispatch queue: com.apple.main-thread
  
  Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
  Exception Codes: EXC_I386_GPFLT
  
  
  Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
  0   libobjc.A.dylib                 0x00007fff877a5256 objc_msgSend + 22
  1   com.apple.AppKit                0x00007fff8dac6e27 -[NSOutlineView _delegate_isGroupRow:] + 66
  2   com.apple.AppKit                0x00007fff8da46878 -[NSTableView _isGroupRow:] + 81
  3   com.apple.AppKit                0x00007fff8da41fad -[NSTableView _isSourceListGroupRow:] + 56
  4   com.apple.AppKit                0x00007fff8da418e8 -[NSTableView rectOfRow:] + 288
  5   com.apple.AppKit                0x00007fff8da5b3cb _NSTVVisibleRowsForUpdate + 296
  6   com.apple.AppKit                0x00007fff8da5aa85 -[NSTableRowData _unsafeUpdateVisibleRowEntries] + 96
  7   com.apple.AppKit                0x00007fff8da5a8a1 -[NSTableRowData updateVisibleRowViews] + 119
  8   com.apple.AppKit                0x00007fff8da6e463 -[NSTableRowData _idleUpdateVisibleRows] + 66
  9   com.apple.CoreFoundation        0x00007fff87547da4 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 20
  10  com.apple.CoreFoundation        0x00007fff875478bd __CFRunLoopDoTimer + 557
  11  com.apple.CoreFoundation        0x00007fff8752d099 __CFRunLoopRun + 1513
  12  com.apple.CoreFoundation        0x00007fff8752c6b2 CFRunLoopRunSpecific + 290
  13  com.apple.HIToolbox             0x00007fff830a30a4 RunCurrentEventLoopInMode + 209
  14  com.apple.HIToolbox             0x00007fff830a2e42 ReceiveNextEventCommon + 356
  15  com.apple.HIToolbox             0x00007fff830a2cd3 BlockUntilNextEventMatchingListInMode + 62
  16  com.apple.AppKit                0x00007fff8d8d8613 _DPSNextEvent + 685
  17  com.apple.AppKit                0x00007fff8d8d7ed2 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 128
  18  com.apple.AppKit                0x00007fff8d8cf283 -[NSApplication run] + 517
  19  com.apple.AppKit                0x00007fff8d873cb6 NSApplicationMain + 869
  20  com.mycompany.myapp             0x000000010f29ce1c 0x10f29b000 + 7708
  </code></pre>