SIGSEGV
SEGV_ACCERR
libobjc.A.dylib objc_object :: release（）+ 16
1 libsystem_blocks.dylib _Block_release + 152
2 libsystem_blocks.dylib _Block_release + 152
3 libsystem_blocks.dylib _Block_release + 152
4 Gundam-[AFURLSessionManagerTaskDelegate .cxx_destruct]（AFURLSessionManager.m：127）
5 libobjc.A.dylib object_cxxDestructFromClass（objc_object *，objc_class *）+ 148
6 libobjc.A.dylib objc_destructInstance + 68
7 libobjc.A.dylib object_dispose + 16
8 Gundam-[AFURLSessionManagerTaskDelegate dealloc]（AFURLSessionManager.m：173）
9高达_destroy_helper_block（AFURLSessionManager.m：246）
10 libsystem_blocks.dylib _Block_release + 152
11 libdispatch.dylib __dispatch_client_callout + 16
12 libdispatch.dylib __dispatch_main_queue_callback_4CF $ VARIANT $ armv81 + 528
13 CoreFoundation _CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE + 12
14 CoreFoundation ___CFRunLoopRun + 2272
15 CoreFoundation CFRunLoopRunSpecific + 552
16 GraphicsServices GSEventRunModal + 100
17 UIKit UIApplicationMain + 236
18 Gundam main（main.m：14）
19 libdyld.dylib _start + 4