Monotouch Crashdump missing any reference to my code-Collection of common programming errors

I have an application written in monotouch and one (only one) of my user application is crashing. I did a symbolicate on the crash dump. I cant see any thing in the dump that points to any of my code:

     Thread 0 name:  Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0   libsystem_kernel.dylib           0x3a26f350 __pthread_kill + 8
1   libsystem_c.dylib                   0x3a1e611e pthread_kill + 54
2   libsystem_c.dylib                   0x3a22296e abort + 90
3   MyApp                           0x00d8085c mono_handle_native_sigsegv (mini-exceptions.c:2325)
4   MyApp                           0x00db2f10 sigabrt_signal_handler (mini-posix.c:196)
5   libsystem_c.dylib                   0x3a1efe90 _sigtramp + 40
6   libsystem_c.dylib                   0x3a1e611e pthread_kill + 54
7   libsystem_c.dylib                   0x3a22296e abort + 90
8   MyApp                           0x00e07df0 monotouch_unhandled_exception_handler (monotouch-glue.m:1440)
9   MyApp                           0x00d7e0ee mono_invoke_unhandled_exception_hook (mini-exceptions.c:2561)
10  MyApp                          0x00d38c36 mono_thread_abort (mini.c:2629)
11  MyApp                          0x00d803ec mono_handle_exception_internal + 2136
12  MyApp                          0x00d804b8 mono_handle_exception (mini-exceptions.c:1902)
13  MyApp                          0x00db1b84 handle_signal_exception (exceptions-arm.c:559)
14  MyApp                          0x00139e20 MonoTouch_UIKit_UIControlEventProxy_Activated + 64
15  MyApp                          0x006a3e94 wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr + 196
16  MyApp                          0x00d3b1d4 mono_jit_runtime_invoke (mini.c:5793)
17  MyApp                          0x00da8da4 mono_runtime_invoke (object.c:2790)
18  MyApp                          0x00ca90e6 native_to_managed_trampoline_MonoTouch_UIKit_UIControlEventProxy_Activated (:97)
19  UIKit                                  0x33df00c0 -[UIApplication sendAction:to:from:forEvent:] + 68
20  UIKit                                  0x33df0072 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 26
21  UIKit                                  0x33df0050 -[UIControl sendAction:to:forEvent:] + 40
22  UIKit                                  0x33def906 -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 498
23  UIKit                                  0x33defdfc -[UIControl touchesEnded:withEvent:] + 484
24  UIKit                                  0x33d0e41c _UIGestureRecognizerUpdate + 5764
25  CoreFoundation                    0x31ed26ca __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 18
26  CoreFoundation                    0x31ed09bc __CFRunLoopDoObservers + 272
27  CoreFoundation                    0x31ed0d12 __CFRunLoopRun + 738
28  CoreFoundation                    0x31e43eb8 CFRunLoopRunSpecific + 352
29  CoreFoundation                    0x31e43d44 CFRunLoopRunInMode + 100
30  GraphicsServices                  0x359fa2e6 GSEventRunModal + 70
31  UIKit                                  0x33d592fc UIApplicationMain + 1116
32  MyApp                          0x00179168 wrapper_managed_to_native_MonoTouch_UIKit_UIApplication_UIApplicationMain_int_string___intptr_intptr + 236
33  MyApp                          0x003cd10c MyApp_Application_Main_string__ + 44
34  MyApp                          0x006a3e94 wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr + 196
35  MyApp                          0x00d3b1d4 mono_jit_runtime_invoke (mini.c:5793)
36  MyApp                          0x00da8da4 mono_runtime_invoke (object.c:2790)
37  MyApp                          0x00dabb0a mono_runtime_exec_main (object.c:3972)
38  MyApp                          0x00daf42e mono_runtime_run_main (object.c:3602)
39  MyApp                          0x00d527b6 mono_jit_exec (driver.c:1125)
40  MyApp                          0x00dfaaac main (main.m:482)
41  MyApp                          0x000430d8 start + 36

Any suggestions on what I should do from here ?

thank Christian

1. iOS crash log is not descriptive is some situations.

   Try to make your alternative to iOS crash reporting system:

   • Log user actions into memory;
   • Subscribe for UnhandledException event:

           // In AppDelegate.FinishedLaunching
           AppDomain.CurrentDomain.UnhandledException += (object sender, UnhandledExceptionEventArgs e) => {
               LogTool.SaveLog(e);
           };
   

   • When user next time run an app, check that log is not empty. If so, suggest user to send crash log to you via email (see MFMailComposeViewController class usage examples).

   Thus, you will get exact information you need to solve issues.