- [NSMutableArray的removeAllObjects]和 - [NSMutableArray的ADDOBJECT：]扔NSRangeException

Question

第一碰撞通過到removeAllObjects呼叫造成的，並且所述第二，ADDOBJECT：

2013-08-01 21:54:05.706 Zipper[1754:1803] An uncaught exception was raised 
2013-08-01 21:54:05.721 Zipper[1754:1803] *** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSArrayM removeObjectAtIndex:]: index 201 beyond bounds [0 .. 198]' 
*** First throw call stack: 
(
    0 CoreFoundation      0x00007fff94017b06 __exceptionPreprocess + 198 
    1 libobjc.A.dylib      0x00007fff99d043f0 objc_exception_throw + 43 
    2 CoreFoundation      0x00007fff93fb4a04 -[__NSArrayM removeObjectAtIndex:] + 276 
    3 CoreFoundation      0x00007fff93ff457f -[NSMutableArray removeAllObjects] + 79 
    4 Zipper        0x000000010000f760 __21-[JOxxx jo_parse]_block_invoke + 368 
    5 libdispatch.dylib     0x00007fff8fe9af01 _dispatch_call_block_and_release + 15 
    6 libdispatch.dylib     0x00007fff8fe970b6 _dispatch_client_callout + 8 
    7 libdispatch.dylib     0x00007fff8fe9847f _dispatch_queue_drain + 235 
    8 libdispatch.dylib     0x00007fff8fe982f1 _dispatch_queue_invoke + 52 
    9 libdispatch.dylib     0x00007fff8fe981c3 _dispatch_worker_thread2 + 249 
10 libsystem_c.dylib     0x00007fff95f64d0b _pthread_wqthread + 404 
    11 libsystem_c.dylib     0x00007fff95f4f1d1 start_wqthread + 13 
) 
libc++abi.dylib: terminate called throwing an exception 

和

2013-08-01 21:52:15.964 Zipper[1616:1813] An uncaught exception was raised 
2013-08-01 21:52:15.965 Zipper[1616:1813] *** -[__NSArrayM insertObject:atIndex:]: index 132 beyond bounds [0 .. 130] 
2013-08-01 21:52:15.966 Zipper[1616:1813] (
    0 CoreFoundation      0x00007fff94017b06 __exceptionPreprocess + 198 
    1 libobjc.A.dylib      0x00007fff99d043f0 objc_exception_throw + 43 
    2 CoreFoundation      0x00007fff93fc827a -[__NSArrayM insertObject:atIndex:] + 282 
    3 Zipper        0x000000010000f902 __21-[JOxxx jo_parse]_block_invoke + 690 
    4 libdispatch.dylib     0x00007fff8fe9af01 _dispatch_call_block_and_release + 15 
    5 libdispatch.dylib     0x00007fff8fe970b6 _dispatch_client_callout + 8 
    6 libdispatch.dylib     0x00007fff8fe9847f _dispatch_queue_drain + 235 
    7 libdispatch.dylib     0x00007fff8fe982f1 _dispatch_queue_invoke + 52 
    8 libdispatch.dylib     0x00007fff8fe981c3 _dispatch_worker_thread2 + 249 
    9 libsystem_c.dylib     0x00007fff95f64d0b _pthread_wqthread + 404 
    10 libsystem_c.dylib     0x00007fff95f4f1d1 start_wqthread + 13 
) 

Answer 1

兩個隊列正在同時訪問陣列。