ios - AFNetworking crash analysis for EXC_BAD_ACCESS KERN_INVALID_ADDRESS -


i'm getting crash reports of afnetworking throwing exc_bad_access kern_invalid_address:

thread : crashed: com.apple.root.default-priority 0  libobjc.a.dylib                0x39e237fa objc_release + 9 1  my_app                         0x0015ba63 __64-[afhttprequestoperation setcompletionblockwithsuccess:failure:]_block_invoke (afhttprequestoperation.m:266) 2  my_app                         0x00163bf7 __47-[afurlconnectionoperation setcompletionblock:]_block_invoke (afurlconnectionoperation.m:301) 3  foundation                     0x3049a2a9 __103+[__nsoperationinternal _observevalueforkeypath:ofobject:changekind:oldvalue:newvalue:indexes:context:]_block_invoke96 + 12 4  libdispatch.dylib              0x3a30b0c3 _dispatch_call_block_and_release + 10 5  libdispatch.dylib              0x3a3107d9 _dispatch_root_queue_drain + 224 6  libdispatch.dylib              0x3a3109c5 _dispatch_worker_thread2 + 56 7  libsystem_pthread.dylib        0x3a43adff _pthread_wqthread + 298

i need understand possible bug. happens sometimes, rare , related timeout issue when user using 3g (network can disconnected while loading data).

i don't post code because can't find on crash log in file or class crash happened , use afnetworking in lot of files.

without code conjecture but:

something in completion block being accessed after deallocated. commonly, happens when network operation isn't cancelled after view controller dismissed.


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