com.apple.NSURLSession-work EXC_BAD_ACCESS崩溃调试

Question

我看到了以下崩溃报告,但它不可重现.我该如何调试呢？这是AFNetworking问题吗？我正在使用2.4.1版.

Crashed: com.apple.NSURLSession-work
EXC_BAD_ACCESS KERN_INVALID_ADDRESS at 0x0000000000000000

Thread : Crashed: com.apple.NSURLSession-work
0  CoreFoundation                 0x0000000184aad978 CFDictionaryGetValue + 56
1  Foundation                     0x0000000185aa9300 _NSSetLongLongValueAndNotify + 72
2  Foundation                     0x0000000185aa9300 _NSSetLongLongValueAndNotify + 72
3  CFNetwork                      0x0000000184543468 -[__NSCFLocalSessionTask _task_onqueue_didFinish] + 472
4  CFNetwork                      0x0000000184544b38 -[__NSCFLocalSessionTask connection:didFinishLoadingWithError:] + 40
5  CFNetwork                      0x000000018458d030 __46-[__NSCFURLSessionConnection _task_sendFinish]_block_invoke + 136
6  libdispatch.dylib              0x0000000196a49994 _dispatch_call_block_and_release + 24
7  libdispatch.dylib              0x0000000196a49954 _dispatch_client_callout + 16
8  libdispatch.dylib              0x0000000196a540a4 _dispatch_queue_drain + 1448
9  libdispatch.dylib              0x0000000196a4ca5c _dispatch_queue_invoke + 132
10 libdispatch.dylib              0x0000000196a56318 _dispatch_root_queue_drain + 720
11 libdispatch.dylib              0x0000000196a57c4c _dispatch_worker_thread3 + 108
12 libsystem_pthread.dylib        0x0000000196c2922c _pthread_wqthread + 816

Answer 1

是的，很可能是 AFNetworking 错误（在 2.5.0 中修复）。具体来说，这个：

https://github.com/AFNetworking/AFNetworking/issues/1477

如果不是，那么它可能是类似的东西——一个试图观察 URL 会话任务某些方面的键值观察器已经被解除分配，并且在被解除分配之前没有停止观察该任务。