About the iOS10 API AVKeyPathFlattener crash

[Wakever]

Hi, recent I used AVPlayer to play while downloading, everything seems fine. Bug I found some crash about AVKeyPathFlattener on the other threads. I can't reproduce and don't know how to solve it. Can you please help me ? Thanks.

Here is the crash log:

#10 Thread NSInternalInconsistencyException An instance 0x170031fa0 of class AVKeyPathFlattener was deallocated while key value observers were still registered with it. Current observation info: <NSKeyValueObservationInfo 0x170432860> ( <NSKeyValueObservance 0x17404c660: Observer: 0x170269f80, Key path: operationCount, Options: <New: NO, Old: NO, Prior: NO> Context: 0x0, Property: 0x17404c510> ) 0 CoreFoundation ___exceptionPreprocess + 124 1 libobjc.A.dylib objc_exception_throw + 56 2 CoreFoundation -[NSException initWithCoder:] 3 Foundation _NSKVODeallocate + 300 4 AVFoundation -[AVPlayerLayer _stopObservingPlayer:] + 244 5 libdispatch.dylib __dispatch_call_block_and_release + 24 6 libdispatch.dylib __dispatch_client_callout + 16 7 libdispatch.dylib __dispatch_queue_serial_drain + 928 8 libdispatch.dylib __dispatch_queue_invoke + 652 9 libdispatch.dylib __dispatch_queue_override_invoke + 360 10 libdispatch.dylib __dispatch_root_queue_drain + 572 11 libdispatch.dylib __dispatch_worker_thread3 + 124 12 libsystem_pthread.dylib _pthread_wqthread + 1288 13 libsystem_pthread.dylib start_wqthread + 4

#0 Thread 0 libsystem_platform.dylib 0x0000000181a916c0 OSAtomicEnqueue 1 CoreFoundation 0x00000001829b4770 __CFRelease 2 CoreText 0x0000000185674d8c TFont::~TFont() 3 CoreFoundation 0x00000001829b4358 __CFRelease 4 CoreText 0x000000018569df44 CTTateChuYokoRun::CloneRange(CTRun const*, CFRange, TRun::SubrangingStyle) 5 CoreText 0x000000018566c7b4 TFontCascade::~TFontCascade() 6 CoreText 0x0000000185669bf4 TGlyphEncoder::EncodeChars(CFRange, TAttributes const&, TGlyphList<TDeletedGlyphIndex>&, TGlyphEncoder::Fallbacks) 7 CoreText 0x00000001856693b4 TTypesetterAttrString::Initialize(__CFAttributedString const*) 8 CoreText 0x00000001856690cc TTypesetterAttrString::TTypesetterAttrString(__CFAttributedString const*) 9 CoreText 0x0000000185668fb4 CTLineCreateWithAttributedString 10 UIFoundation 0x0000000188828b18 ___NSStringDrawingEngine 11 UIFoundation 0x0000000188827acc -[NSString(NSExtendedStringDrawing) boundingRectWithSize:options:attributes:context:] 12 UIFoundation 0x0000000188825fec -[NSString(NSStringDrawing) sizeWithAttributes:] 13 MyApp 0x0000000100328240 -[ECAnalysisLyric analysisLyric:withMaxFont:orLyricData:twoline:] (ECAnalysisLyric.m:264) 14 MyApp 0x00000001002a8b34 -[ECArtworkViewController getLyricInfo:] (ECArtworkViewController.m:2685) 15 libdispatch.dylib 0x000000018188e1fc __dispatch_call_block_and_release 16 libdispatch.dylib 0x000000018188e1bc __dispatch_client_callout 17 libdispatch.dylib 0x0000000181892d68 _dispatch_main_queue_callback_4CF 18 CoreFoundation 0x00000001829b2810 _CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE 19 CoreFoundation 0x00000001829b03fc ___CFRunLoopRun 20 CoreFoundation 0x00000001828de2b8 CFRunLoopRunSpecific 21 GraphicsServices 0x0000000184392198 GSEventRunModal 22 UIKit 0x00000001889257fc -[UIApplication _run] 23 UIKit 0x0000000188920534 UIApplicationMain 24 MyApp 0x000000010040e04c main (main.m:14) 25 libdyld.dylib 0x00000001818c15b8 _start

#1Thread com.apple.uikit.eventfetch-thread 0 libsystem_kernel.dylib 0x00000001819b5188 mach_msg_trap 1 libsystem_kernel.dylib 0x00000001819b4ff8 mach_msg 2 CoreFoundation 0x00000001829b25d0 ___CFRunLoopServiceMachPort 3 CoreFoundation 0x00000001829b01ec ___CFRunLoopRun 4 CoreFoundation 0x00000001828de2b8 CFRunLoopRunSpecific 5 Foundation 0x000000018341b26c -[NSRunLoop(NSRunLoop) runMode:beforeDate:] 6 Foundation 0x000000018343bdd0 -[NSRunLoop(NSRunLoop) runUntilDate:] 7 UIKit 0x0000000189299c38 -[UIEventFetcher threadMain] 8 Foundation 0x0000000183518e68 _NSThread__start 9 libsystem_pthread.dylib 0x0000000181a99850 __pthread_body 10 libsystem_pthread.dylib 0x0000000181a99760 __pthread_body

#2 Thread 0 libsystem_kernel.dylib 0x00000001819b5188 mach_msg_trap 1 libsystem_kernel.dylib 0x00000001819b4ff8 mach_msg 2 CoreFoundation 0x00000001829b25d0 ___CFRunLoopServiceMachPort 3 CoreFoundation 0x00000001829b01ec ___CFRunLoopRun 4 CoreFoundation 0x00000001828de2b8 CFRunLoopRunSpecific 5 MyApp 0x00000001003de900 +[ASIHTTPRequest runRequests] (ASIHTTPRequest.m:4913) 6 Foundation 0x0000000183518e68 _NSThread__start 7 libsystem_pthread.dylib 0x0000000181a99850 __pthread_body 8 libsystem_pthread.dylib 0x0000000181a99760 __pthread_body

#3 com.apple.NSURLConnectionLoader 0 libsystem_kernel.dylib 0x00000001819b5188 mach_msg_trap 1 libsystem_kernel.dylib 0x00000001819b4ff8 mach_msg 2 CoreFoundation 0x00000001829b25d0 ___CFRunLoopServiceMachPort 3 CoreFoundation 0x00000001829b01ec ___CFRunLoopRun 4 CoreFoundation 0x00000001828de2b8 CFRunLoopRunSpecific 5 CFNetwork 0x00000001830e3a70 +[NSURLConnection(Loader) _resourceLoadLoop:] 6 Foundation 0x0000000183518e68 _NSThread__start 7 libsystem_pthread.dylib 0x0000000181a99850 __pthread_body 8 libsystem_pthread.dylib 0x0000000181a99760 __pthread_body

#4 AVAudioSession Notify Thread 0 libsystem_kernel.dylib 0x00000001819b5188 mach_msg_trap 1 libsystem_kernel.dylib 0x00000001819b4ff8 mach_msg 2 CoreFoundation 0x00000001829b25d0 ___CFRunLoopServiceMachPort 3 CoreFoundation 0x00000001829b01ec ___CFRunLoopRun 4 CoreFoundation 0x00000001828de2b8 CFRunLoopRunSpecific 5 AVFAudio 0x000000019c57fd24 GenericRunLoopThread::Entry(void*) 6 AVFAudio 0x000000019c5a5d9c CAPThread::Entry(CAPThread*) 7 libsystem_pthread.dylib 0x0000000181a99850 __pthread_body 8 libsystem_pthread.dylib 0x0000000181a99760 __pthread_body

#5 keep live 0 libsystem_kernel.dylib 0x00000001819d3314 __semwait_signal 1 libsystem_c.dylib 0x00000001818f125c nanosleep 2 Foundation 0x0000000183518118 +[NSThread sleepForTimeInterval:] 3 MyApp 0x00000001000ab03c -[EncoreProtoInterface run] (EncoreProtoInterface.mm:119) 4 Foundation 0x0000000183518e68 _NSThread__start 5 libsystem_pthread.dylib 0x0000000181a99850 __pthread_body 6 libsystem_pthread.dylib 0x0000000181a99760 __pthread_body

#6 com.apple.CFSocket.private 0 libsystem_kernel.dylib 0x00000001819d323c __select 1 CoreFoundation 0x00000001829b9468 ___CFSocketManager 2 libsystem_pthread.dylib 0x0000000181a99850 __pthread_body 3 libsystem_pthread.dylib 0x0000000181a99760 __pthread_body

#7 Thread 0 libsystem_kernel.dylib 0x00000001819b51dc semaphore_timedwait_trap 1 libdispatch.dylib 0x00000001818a0770 __dispatch_semaphore_wait_slow 2 libdispatch.dylib 0x000000018189f808 __dispatch_worker_thread 3 libsystem_pthread.dylib 0x0000000181a99850 __pthread_body 4 libsystem_pthread.dylib 0x0000000181a99760 __pthread_body

#8 Thread 0 libsystem_kernel.dylib 0x00000001819d3a88 __workq_kernreturn 1 libsystem_pthread.dylib 0x0000000181a97344 _pthread_wqthread

#9 Thread 0 libsystem_kernel.dylib 0x00000001819d2e1c __psynch_cvwait 1 libsystem_pthread.dylib 0x0000000181a989c0 __pthread_cond_wait 2 Foundation 0x00000001834f25c8 -[__NSOperationInternal _waitUntilFinished:] 3 CFNetwork 0x000000018326154c -[NSURLConnectionInternal _withConnectionAndDelegate:onlyActive:] 4 CFNetwork 0x00000001832616c0 -[NSURLConnectionInternal _withActiveConnectionAndDelegate:] 5 CFNetwork 0x000000018321f974 _NSURLConnectionDidReceiveResponse(_CFURLConnection*, _CFURLResponse*, void const*) 6 CFNetwork 0x0000000183185c78 invocation function for block in URLConnectionClient_Classic::_delegate_didReceiveResponse(_CFURLResponse*) 7 CFNetwork 0x00000001831817ac invocation function for block in URLConnectionClient_Classic::_withDelegateAsync(char const*, void (_CFURLConnection*, CFURLConnectionClientCurrent_VMax const*) block_pointer) 8 CFNetwork 0x000000018323e85c invocation function for block in QCoreSchedulingSet::performAsync(void () block_pointer) const 9 libdispatch.dylib 0x000000018188e1fc __dispatch_call_block_and_release 10 libdispatch.dylib 0x000000018188e1bc __dispatch_client_callout 11 libdispatch.dylib 0x000000018189c3dc __dispatch_queue_serial_drain 12 libdispatch.dylib 0x00000001818919a4 __dispatch_queue_invoke 13 libdispatch.dylib 0x000000018189e34c __dispatch_root_queue_drain 14 libdispatch.dylib 0x000000018189e0ac __dispatch_worker_thread3 15 libsystem_pthread.dylib 0x0000000181a972a0 _pthread_wqthread

#11 Thread 0 libsystem_kernel.dylib 0x00000001819d3a88 __workq_kernreturn 1 libsystem_pthread.dylib 0x0000000181a97160 _pthread_wqthread

#12 Thread 0 libsystem_kernel.dylib 0x00000001819d3a88 __workq_kernreturn 1 libsystem_pthread.dylib 0x0000000181a97344 _pthread_wqthread

#13 Thread 0 libsystem_kernel.dylib 0x00000001819d3a88 __workq_kernreturn 1 libsystem_pthread.dylib 0x0000000181a97344 _pthread_wqthread

#14 Thread 0 libsystem_kernel.dylib 0x00000001819d3a88 __workq_kernreturn 1 libsystem_pthread.dylib 0x0000000181a97344 _pthread_wqthread

[KxShare]

I have the same crash! @Wakever Do you fix it？

[mokeycoding]

I have the same crash!

[Wakever]

@KxShare No idea yet, and you ?

[waterfly]

I also have the crash, but no idea

[leeeisok]

@Wakever I also have the crash, but no idea. have u solved it ?