I am testing my app out, pushing it pretty hard, and I’m getting it to crash (black screen, image doesn’t save, drops back to springboard). However, I get no crash reports logged in the console. When I test using profiler all I get is a message saying the target died, but it gives no clues.
In the organiser I got the device crash logs which gives me this which I believe is telling me I’m sending a message to something I’ve released (objc-msgSend + 22)? Am I on the right track here?
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Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x576e6f69
Crashed Thread: 0
Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0 libobjc.A.dylib 0x34f8ef7e objc_msgSend + 22
1 CoreFoundation 0x371d7e90 CFRetain + 76
2 CoreFoundation 0x371e1b74 +[__NSArrayI __new::] + 48
3 CoreFoundation 0x371e1a8e -[__NSPlaceholderArray initWithObjects:count:] + 294
4 CoreFoundation 0x371e9394 -[NSArray initWithArray:range:copyItems:] + 756
5 CoreFoundation 0x371fcd5a +[NSArray arrayWithArray:] + 66
6 AVFoundation 0x335da766 -[AVCaptureSession outputs] + 146
7 AVFoundation 0x335de26e -[AVCaptureSession _doDidStop:] + 38
8 AVFoundation 0x335dfaea -[AVCaptureSession _handleNotification:payload:] + 2002
9 AVFoundation 0x335d8af6 avcaptureSessionFigRecorderNotification + 1202
10 AVFoundation 0x335fafd8 AVCMNotificationDispatcherCallback + 184
11 CoreFoundation 0x3725b7c8 __CFNotificationCenterAddObserver_block_invoke_0 + 116
12 CoreFoundation 0x3725b540 ___CFXNotificationPost_block_invoke_0 + 64
13 CoreFoundation 0x371e7090 _CFXNotificationPost + 1400
14 CoreFoundation 0x371ef1c6 CFNotificationCenterPostNotification + 102
15 CoreMedia 0x366eeeb0 CMNotificationCenterPostNotification + 112
16 Celestial 0x374b08a2 FigRecorderRemoteCallbacksServer_NotificationIsPending + 478
17 Celestial 0x374b06ba _XNotificationIsPending + 54
18 Celestial 0x374b0678 figrecordercallbacks_server + 92
19 Celestial 0x374af642 remrec_ClientPortCallBack + 146
20 CoreFoundation 0x37258f0c __CFMachPortPerform + 356
21 CoreFoundation 0x3726351c __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 32
22 CoreFoundation 0x372634be __CFRunLoopDoSource1 + 134
23 CoreFoundation 0x3726230c __CFRunLoopRun + 1364
24 CoreFoundation 0x371e549e CFRunLoopRunSpecific + 294
25 CoreFoundation 0x371e5366 CFRunLoopRunInMode + 98
26 AVFoundation 0x335ef4d0 -[AVRunLoopCondition _waitInMode:untilDate:] + 348
27 AVFoundation 0x335ef36c -[AVRunLoopCondition waitUntilDate:inMode:] + 20
28 AVFoundation 0x335dc13a -[AVCaptureSession _stopPreviewing] + 438
29 AVFoundation 0x335dc2d6 -[AVCaptureSession _setRunning:] + 166
30 AVFoundation 0x335dbe42 -[AVCaptureSession stopRunning] + 274
31 zApp 0x0007e1ce 0x79000 + 20942
32 UIKit 0x30fa5b8e -[UIViewController _setViewAppearState:isAnimating:] + 138
33 UIKit 0x30fff8a8 -[UIViewController beginAppearanceTransition:animated:] + 184
34 UIKit 0x310468be -[UIWindowController transition:fromViewController:toViewController:target:didEndSelector:] + 4098
35 UIKit 0x31045360 -[UIViewController presentViewController:withTransition:completion:] + 3116
36 UIKit 0x310a06a0 -[UIViewController presentModalViewController:animated:] + 24
37 CoreFoundation 0x371e93f6 -[NSObject performSelector:withObject:withObject:] + 46
38 UIKit 0x30f7ee00 -[UIApplication sendAction:to:from:forEvent:] + 56
39 UIKit 0x30f7edbc -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 24
40 UIKit 0x30f7ed9a -[UIControl sendAction:to:forEvent:] + 38
41 UIKit 0x30f7eb0a -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 486
42 UIKit 0x30f7f442 -[UIControl touchesEnded:withEvent:] + 470
43 UIKit 0x30f7d924 -[UIWindow _sendTouchesForEvent:] + 312
44 UIKit 0x30f7d312 -[UIWindow sendEvent:] + 374
45 UIKit 0x30f6368e -[UIApplication sendEvent:] + 350
46 UIKit 0x30f62f34 _UIApplicationHandleEvent + 5820
47 GraphicsServices 0x339a5224 PurpleEventCallback + 876
48 CoreFoundation 0x3726351c __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 32
49 CoreFoundation 0x372634be __CFRunLoopDoSource1 + 134
50 CoreFoundation 0x3726230c __CFRunLoopRun + 1364
51 CoreFoundation 0x371e549e CFRunLoopRunSpecific + 294
52 CoreFoundation 0x371e5366 CFRunLoopRunInMode + 98
53 GraphicsServices 0x339a4432 GSEventRunModal + 130
54 UIKit 0x30f91cce UIApplicationMain + 1074
55 zApp 0x0007ffa6 0x79000 + 28582
56 zApp 0x0007a680 0x79000 + 5760
If you suspect that you are overreleasing something, try running your app with NSZombie enabled. (how to enable NSZombie)
You can set exception breakpoint to print backtrace in console.