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我无法诊断此崩溃日志，这在使用AVPlayer类时会发生 - 有时会立即发生，有时会在尝试播放第2或第3个视频时发生。iOS 8崩溃日志（AVPlayer）
Incident Identifier: 4E82E665-228D-4A97-8B85-6F5B65E2B457
CrashReporter Key: 46be3f0cd4d380b2ce08823fedd6d6d22c38df2f
Hardware Model: iPad4,2
Process: App [2433]
Path: /private/var/mobile/Containers/Bundle/Application/66E1EFE7-1BD0-4CE3-8FEF-47D58C36ADF7/App.app/App
Identifier: SXX.app
Version: 1.3 (1.3)
Code Type: ARM-64 (Native)
Parent Process: launchd [1]
Date/Time: 2015-03-31 15:59:07.361 -0700
Launch Time: 2015-03-31 15:57:50.272 -0700
OS Version: iOS 8.2 (12D508)
Report Version: 105
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Triggered by Thread: 6
Last Exception Backtrace:
0 CoreFoundation 0x18530a530 __exceptionPreprocess + 132
1 libobjc.A.dylib 0x1964280e4 objc_exception_throw + 60
2 CoreFoundation 0x18530a470 +[NSException raise:format:] + 128
3 Foundation 0x1861865e0 NSKVODeallocate + 340
4 AVFoundation 0x183b27b38 __destroy_helper_block_1474 + 28
5 libsystem_blocks.dylib 0x196ad1910 _Block_release + 256
6 libdispatch.dylib 0x196a79954 _dispatch_client_callout + 16
7 libdispatch.dylib 0x196a7e20c _dispatch_main_queue_callback_4CF + 1608
8 CoreFoundation 0x1852c22ec __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 12
9 CoreFoundation 0x1852c0394 __CFRunLoopRun + 1492
10 CoreFoundation 0x1851ed1f4 CFRunLoopRunSpecific + 396
11 GraphicsServices 0x18e51f6fc GSEventRunModal + 168
12 UIKit 0x189b7e10c UIApplicationMain + 1488
13 App 0x10001d4ac main (main.m:8)
14 libdyld.dylib 0x196aa6a08 start + 4
Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0:
0 libsystem_kernel.dylib 0x0000000196bbf594 __semwait_signal_nocancel + 8
1 libsystem_c.dylib 0x0000000196aef1a0 nanosleep$NOCANCEL + 200
2 libsystem_c.dylib 0x0000000196b142b8 usleep$NOCANCEL + 64
3 libsystem_c.dylib 0x0000000196b36b1c abort + 116
4 App 0x0000000100042b50 uncaught_exception_handler + 32
5 CoreFoundation 0x000000018530a8ec __handleUncaughtException + 688
6 libobjc.A.dylib 0x00000001964283b0 _objc_terminate() + 112
7 libc++abi.dylib 0x0000000195c25bb0 std::__terminate(void (*)()) + 12
8 libc++abi.dylib 0x0000000195c25474 __cxa_throw + 132
9 libobjc.A.dylib 0x0000000196428200 objc_exception_throw + 344
10 CoreFoundation 0x000000018530a46c +[NSException raise:format:] + 124
11 Foundation 0x00000001861865dc NSKVODeallocate + 336
12 AVFoundation 0x0000000183b27b34 __destroy_helper_block_1474 + 24
13 libsystem_blocks.dylib 0x0000000196ad190c _Block_release + 252
14 libdispatch.dylib 0x0000000196a79950 _dispatch_client_callout + 12
15 libdispatch.dylib 0x0000000196a7e208 _dispatch_main_queue_callback_4CF + 1604
16 CoreFoundation 0x00000001852c22e8 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 8
17 CoreFoundation 0x00000001852c0390 __CFRunLoopRun + 1488
18 CoreFoundation 0x00000001851ed1f0 CFRunLoopRunSpecific + 392
19 GraphicsServices 0x000000018e51f6f8 GSEventRunModal + 164
20 UIKit 0x0000000189b7e108 UIApplicationMain + 1484
21 App 0x000000010001d4a8 main (main.m:8)
22 libdyld.dylib 0x0000000196aa6a04 start + 0
Thread 1 name: Dispatch queue: com.apple.libdispatch-manager
Thread 1:
0 libsystem_kernel.dylib 0x0000000196ba4c24 kevent64 + 8
1 libdispatch.dylib 0x0000000196a89e6c _dispatch_mgr_invoke + 272
2 libdispatch.dylib 0x0000000196a7b998 _dispatch_mgr_thread + 48
Thread 2 name: com.apple.NSURLConnectionLoader
Thread 2:
0 libsystem_kernel.dylib 0x0000000196ba4e0c mach_msg_trap + 8
1 libsystem_kernel.dylib 0x0000000196ba4c84 mach_msg + 68
2 CoreFoundation 0x00000001852c2214 __CFRunLoopServiceMachPort + 196
3 CoreFoundation 0x00000001852c0168 __CFRunLoopRun + 936
4 CoreFoundation 0x00000001851ed1f0 CFRunLoopRunSpecific + 392
5 CFNetwork 0x0000000184cee2a0 +[NSURLConnection(Loader) _resourceLoadLoop:] + 436
6 Foundation 0x0000000186202304 __NSThread__main__ + 1068
7 libsystem_pthread.dylib 0x0000000196c5bdc4 _pthread_body + 160
8 libsystem_pthread.dylib 0x0000000196c5bd20 _pthread_start + 156
9 libsystem_pthread.dylib 0x0000000196c58ef4 thread_start + 0
Thread 3:
0 libsystem_kernel.dylib 0x0000000196bbfc78 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x0000000196c592d8 _pthread_wqthread + 988
2 libsystem_pthread.dylib 0x0000000196c58eec start_wqthread + 0
Thread 4 name: com.apple.CFSocket.private
Thread 4:
0 libsystem_kernel.dylib 0x0000000196bbf498 __select + 8
1 CoreFoundation 0x00000001852c7c0c __CFSocketManager + 656
2 libsystem_pthread.dylib 0x0000000196c5bdc4 _pthread_body + 160
3 libsystem_pthread.dylib 0x0000000196c5bd20 _pthread_start + 156
4 libsystem_pthread.dylib 0x0000000196c58ef4 thread_start + 0
Thread 5 name: com.apple.coremedia.player.remote
Thread 5:
0 libsystem_kernel.dylib 0x0000000196ba4e0c mach_msg_trap + 8
1 libsystem_kernel.dylib 0x0000000196ba4c84 mach_msg + 68
2 MediaToolbox 0x00000001876efe7c FigExpressNotificationThread + 100
3 CoreMedia 0x0000000185b22028 figThreadMain + 244
4 libsystem_pthread.dylib 0x0000000196c5bdc4 _pthread_body + 160
5 libsystem_pthread.dylib 0x0000000196c5bd20 _pthread_start + 156
6 libsystem_pthread.dylib 0x0000000196c58ef4 thread_start + 0
Thread 6 Crashed:
0 libsystem_kernel.dylib 0x0000000196bbfc78 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x0000000196c592d8 _pthread_wqthread + 988
2 libsystem_pthread.dylib 0x0000000196c58eec start_wqthread + 0
Thread 7:
0 libsystem_kernel.dylib 0x0000000196bbfc78 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x0000000196c592d8 _pthread_wqthread + 988
2 libsystem_pthread.dylib 0x0000000196c58eec start_wqthread + 0
Thread 8 name: com.apple.coremedia.player.async
Thread 8:
0 libsystem_kernel.dylib 0x0000000196ba4e48 semaphore_wait_trap + 8
1 libdispatch.dylib 0x0000000196a87f3c _dispatch_semaphore_wait_slow + 252
2 MediaToolbox 0x00000001876e95bc fpa_AsyncMovieControlThread + 1952
3 CoreMedia 0x0000000185b22028 figThreadMain + 244
4 libsystem_pthread.dylib 0x0000000196c5bdc4 _pthread_body + 160
5 libsystem_pthread.dylib 0x0000000196c5bd20 _pthread_start + 156
6 libsystem_pthread.dylib 0x0000000196c58ef4 thread_start + 0
Thread 9 name: com.apple.coremedia.player.async
Thread 9:
0 libsystem_kernel.dylib 0x0000000196ba4e48 semaphore_wait_trap + 8
1 libdispatch.dylib 0x0000000196a87f3c _dispatch_semaphore_wait_slow + 252
2 MediaToolbox 0x00000001876e95bc fpa_AsyncMovieControlThread + 1952
3 CoreMedia 0x0000000185b22028 figThreadMain + 244
4 libsystem_pthread.dylib 0x0000000196c5bdc4 _pthread_body + 160
5 libsystem_pthread.dylib 0x0000000196c5bd20 _pthread_start + 156
6 libsystem_pthread.dylib 0x0000000196c58ef4 thread_start + 0
Thread 10:
0 libsystem_kernel.dylib 0x0000000196bbfc78 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x0000000196c592d8 _pthread_wqthread + 988
2 libsystem_pthread.dylib 0x0000000196c58eec start_wqthread + 0
Thread 11:
0 libsystem_kernel.dylib 0x0000000196bbfc78 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x0000000196c592d8 _pthread_wqthread + 988
2 libsystem_pthread.dylib 0x0000000196c58eec start_wqthread + 0
Thread 6 crashed with ARM Thread State (64-bit):
x0: 0x0000000000000004 x1: 0x0000000000000000 x2: 0x0000000000000000 x3: 0x0000000000000000
x4: 0x0000000000002d1f x5: 0x0000000000000000 x6: 0x0000000000000000 x7: 0x0000000000000000
x8: 0x0000000000000000 x9: 0x6800a3c4679d3eb0 x10: 0x0000000000000015 x11: 0x0000000000000000
x12: 0x000000012d0ea200 x13: 0x000000019ab850d8 x14: 0x0000000000000000 x15: 0x0000000000000001
x16: 0x0000000000000170 x17: 0x00000001964426b8 x18: 0x0000000000000000 x19: 0x000000010469c000
x20: 0x0000000000000009 x21: 0x00000000800002ff x22: 0x0000000000009f0f x23: 0x0000000000010000
x24: 0x000000019abab000 x25: 0x0000000000000000 x26: 0x0000000000000000 x27: 0x0000000000000000
x28: 0x0000000000000000 fp: 0x000000010469bf70 lr: 0x0000000196c592dc
sp: 0x000000010469bf10 pc: 0x0000000196bbfc78 cpsr: 0x40000000