title: I am getting a lot of SIGSEGV exception in my iOS app crash report and that too crashes in UINavigationController
body: <p>Here is my crash report and this is irrespective of the iOS version and the device. Also I would like to know, is SIGSEGV_ACCERR is something related to memory. Can you Please help me nailing down this issue. I have a bunch of crash reports with the below log</p>
  
  <pre><code>Date/Time:       2012-09-25 23:55:33 +0000
  OS Version:      iPhone OS 5.1.1 (9B206)
  Report Version:  104
  
  Exception Type:  SIGSEGV
  Exception Codes: SEGV_ACCERR at 0x60000008
  Crashed Thread:  0
  
  Thread 0 Crashed:
  0   libobjc.A.dylib                     0x37734f78 objc_msgSend + 16
  1   UIKit                               0x32e0c503 -[UINavigationController _startDeferredTransitionIfNeeded] + 251
  2   UIKit                               0x32e568eb _popViewControllerNormal + 191
  3   UIKit                               0x32e56719 -[UINavigationController _popViewControllerWithTransition:allowPoppingLast:] + 393
  4   UIKit                               0x32e56c79 -[UINavigationController navigationBar:shouldPopItem:] + 153
  5   UIKit                               0x32e56a8f -[UINavigationBar _popNavigationItemWithTransition:] + 99
  6   UIKit                               0x32ea6247 -[UINavigationBar popNavigationItemAnimated:] + 123
  7   UIKit                               0x32ea60d5 -[UINavigationBar _handleMouseUpAtPoint:] + 925
  8   UIKit                               0x32ea5d33 -[UINavigationBar touchesEnded:withEvent:] + 83
  9   UIKit                               0x32de192b -[UIWindow _sendTouchesForEvent:] + 319
  10  UIKit                               0x32de1319 -[UIWindow sendEvent:] + 381
  11  UIKit                               0x32dc7695 -[UIApplication sendEvent:] + 357
  12  UIKit                               0x32dc6f3b _UIApplicationHandleEvent + 5827
  13  GraphicsServices                    0x36f8622b PurpleEventCallback + 883
  14  CoreFoundation                      0x35367523 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 39
  15  CoreFoundation                      0x353674c5 __CFRunLoopDoSource1 + 141
  16  CoreFoundation                      0x35366313 __CFRunLoopRun + 1371
  17  CoreFoundation                      0x352e94a5 CFRunLoopRunSpecific + 301
  18  CoreFoundation                      0x352e936d CFRunLoopRunInMode + 105
  19  GraphicsServices                    0x36f85439 GSEventRunModal + 137
  20  UIKit                               0x32df5cd5 UIApplicationMain + 1081
  21  Myapp                               0x00003597 main (main.m:20)
  </code></pre>