Sources of 'removeObjectAtIndex:'

I have a glitch in

-[__NSArrayM removeObjectAtIndex:] + 262

However, my code is not using removeObjectAtIndex:

. Are there other functions that can be called removeObjectAtIndex:

internally?

My guess replaceObjectAtIndex:

I am using.

Also, is there some documentation source where I can get this kind of information?

here is the complete stack trace:

Thread : Fatal Exception: NSRangeException
0  CoreFoundation                 0x00000001860fe59c __exceptionPreprocess + 132
1  libobjc.A.dylib                0x000000019685c0e4 objc_exception_throw + 60
2  CoreFoundation                 0x0000000185fe362c -[__NSArrayM removeObjectAtIndex:]
3  Musixmatch                     0x0000000100b9da24 +[MyController updateMessage:] + 1011504
4  Musixmatch                     0x0000000100b95dc8 -[MyAPICalls sendNewMessage:] + 979668
5  libdispatch.dylib              0x0000000196ea13ac _dispatch_call_block_and_release + 24
6  libdispatch.dylib              0x0000000196ea136c _dispatch_client_callout + 16
7  libdispatch.dylib              0x0000000196eab4c0 _dispatch_queue_drain + 1216
8  libdispatch.dylib              0x0000000196ea4474 _dispatch_queue_invoke + 132
9  libdispatch.dylib              0x0000000196ead224 _dispatch_root_queue_drain + 664
10 libdispatch.dylib              0x0000000196eae75c _dispatch_worker_thread3 + 108
11 libsystem_pthread.dylib        0x000000019707d2e4 _pthread_wqthread + 816
12 libsystem_pthread.dylib        0x000000019707cfa8 start_wqthread + 4

      

        
        
        
      

    

So the last method called from the application is updateMessage:

. The update message itself has only objectAtIndex:

. Then it calls on two methods in other classes. But if they cause a crash, I believe they should have been included in the stack trace.