Apple

I recently upgrade an old IOS app to use IOS 10.x. When I run the app I am able to play songs how ever when I stop the song I get the following crash. My app is written using audio queues, My ‘soundEngine’ has a AudioQueueBuffer used for playback and my ‘AQConverter’ has a another AudioQueueBufferRef used to convert the audio to LPCM

ref: https://forums.developer.apple.com/thread/66006

Ref: bug report 28875196

Any suggestions would be greatly appreciated.

Thanks

Andy

////////////////////////////////////////////////////////////////////////////////

// AQConverter

- (void) stop {

// http://developer.apple.com/iphone/library/qa/qa2009/qa1562.html

AudioQueueStop (

self.queueObject,

self.audioConverterShouldStopImmediately

);

AudioFileClose (self.audioFileID);

audioFileIDIsClosed = YES;

}

////////////////////////////////////////////////////////////////////////////////

// SoundEngine.mm:332

- (void) stop {

userPressedStopButton = YES;

AQConverter.audioConverterShouldStopImmediately = self.audioPlayerShouldStopImmediately;

[AQConverter stop];

AudioQueueStop (queueObject, self.audioPlayerShouldStopImmediately );

userPressedStopButton = NO; // clear flag

}

Incident Identifier: D83B258B-1DB7-4B9F-B803-FE63EA722910

CrashReporter Key: 34531acd52fc739c4c031178e5d923de281cfbd8

Hardware Model: iPhone7,1

Process: MusicTrainer [2567]

Path: /private/var/containers/Bundle/Application/57FB2B1F-0FD8-49A1-9F8B-BDE3C95682E1/MusicTrainer.app/MusicTrainer

Identifier: com.santacruzintegration.com.MusicTrainer

Version: 3.5.3 (3.5.3)

Code Type: ARM-64 (Native)

Role: Foreground

Parent Process: launchd [1]

Coalition: com.santacruzintegration.com.MusicTrainer [1595]

Date/Time: 2016-10-19 12:38:07.2604 -0700

Launch Time: 2016-10-19 12:37:59.7596 -0700

OS Version: iPhone OS 10.0.2 (14A456)

Report Version: 104

Exception Type: EXC_BREAKPOINT (SIGTRAP)

Exception Codes: 0x0000000000000001, 0x000000018d5d9f60

Termination Signal: Trace/BPT trap: 5

Termination Reason: Namespace SIGNAL, Code 0x5

Terminating Process: exc handler [0]

Triggered by Thread: 4

Application Specific Information:

BUG IN CLIENT OF LIBDISPATCH: dispatch_barrier_sync called on queue already owned by current thread

Abort Cause 6175045248

Filtered syslog:

None found

Thread 0 name: Dispatch queue: com.apple.main-thread

Thread 0:

0 libsystem_kernel.dylib 0x000000018d6f016c mach_msg_trap + 8

1 libsystem_kernel.dylib 0x000000018d6effdc mach_msg + 72

2 CoreFoundation 0x000000018e6edcec __CFRunLoopServiceMachPort + 192

3 CoreFoundation 0x000000018e6eb908 __CFRunLoopRun + 1132

4 CoreFoundation 0x000000018e61a048 CFRunLoopRunSpecific + 444

5 AudioToolbox 0x000000019168e4b4 ClientAudioQueue::AwaitAllPendingCallbacks(bool) + 1088

6 AudioToolbox 0x0000000191690098 AudioQueueStop + 548

7 MusicTrainer 0x00000001000984a4 -[SoundEngine stop] (SoundEngine.mm:332)

8 MusicTrainer 0x0000000100088c6c -[SoundEngineWrapper stop] (SoundEngineWrapper.m:199)

9 MusicTrainer 0x0000000100082bac -[MainViewController stopCallback:] (MainViewController.m:899)

10 UIKit 0x00000001945be7b0 -[UIApplication sendAction:to:from:forEvent:] + 96

11 UIKit 0x00000001947325ec -[UIBarButtonItem(UIInternal) _sendAction:withEvent:] + 168

12 UIKit 0x00000001945be7b0 -[UIApplication sendAction:to:from:forEvent:] + 96

13 UIKit 0x00000001945be730 -[UIControl sendAction:to:forEvent:] + 80

14 UIKit 0x00000001945a8be4 -[UIControl _sendActionsForEvents:withEvent:] + 452

15 UIKit 0x00000001945a8d4c -[UIControl _sendActionsForEvents:withEvent:] + 812

16 UIKit 0x00000001945be01c -[UIControl touchesEnded:withEvent:] + 584

17 UIKit 0x00000001945bdb44 -[UIWindow _sendTouchesForEvent:] + 2484

18 UIKit 0x00000001945b8d8c -[UIWindow sendEvent:] + 2988

19 UIKit 0x0000000194589858 -[UIApplication sendEvent:] + 340

20 UIKit 0x0000000194d76cb8 __dispatchPreprocessedEventFromEventQueue + 2736

21 UIKit 0x0000000194d70720 __handleEventQueue + 784

22 CoreFoundation 0x000000018e6ee278 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 24

23 CoreFoundation 0x000000018e6edbc0 __CFRunLoopDoSources0 + 524

24 CoreFoundation 0x000000018e6eb7c0 __CFRunLoopRun + 804

25 CoreFoundation 0x000000018e61a048 CFRunLoopRunSpecific + 444

26 GraphicsServices 0x000000019009d198 GSEventRunModal + 180

27 UIKit 0x00000001945f4628 -[UIApplication _run] + 684

28 UIKit 0x00000001945ef360 UIApplicationMain + 208

29 MusicTrainer 0x000000010006f2a8 main (main.m:20)

30 libdyld.dylib 0x000000018d5fc5b8 start + 4