Foundation - _NSKVONotifyingOriginalClassForIsa in tvos 15.2 and above

Question

Created Feb ’22

Replies 4

Boosts 1

Views 1.9k

Participants 5

I reset the old player item(remove all observers also) and avplayercontroller then add a new avplayerviewcontroller instance and avplayer and player item on playing a new asset/stream etc. It works fine and no crash in tvos 14, 13 etc. But in tvos 15.2 and above i get the following stack trace.

Below are the details i could collect from firebase, please check if it could help you to infer the cause of the crash. Thanks!


Crashed: com.apple.main-thread
SIGSEGV 0x00000007f2e51110

Crashed: com.apple.main-thread
0 libobjc.A.dylib        0x7624 class_getMethodImplementation + 32
1 Foundation           0xa1f30 _NSKVONotifyingOriginalClassForIsa + 28
2 Foundation           0x9db38 _NSKeyValueObservationInfoGetObservances + 272
3 Foundation           0xa8c50 -[NSObject(NSKeyValueObservingPrivate) _changeValueForKeys:count:maybeOldValuesDict:maybeNewValuesDict:usingBlock:] + 244
4 Foundation           0xa9540 -[NSObject(NSKeyValueObservingPrivate) _changeValueForKey:key:key:usingBlock:] + 68
5 Foundation           0xa2080 _NSSetObjectValueAndNotify + 284
6 AVKit             0xe6b8 -[AVInterstitialController dealloc] + 32
7 AVKit             0x356e4 -[AVPlayerControllerTVExtras .cxx_destruct] + 144
8 libobjc.A.dylib        0x7d68 object_cxxDestructFromClass(objc_object*, objc_class*) + 112
9 libobjc.A.dylib        0x1dad0 objc_destructInstance + 88
10 libobjc.A.dylib        0x24f90 _objc_rootDealloc + 52
11 libsystem_blocks.dylib     0x37f8 _Block_release + 184
12 libdispatch.dylib       0x4f84 _dispatch_client_callout + 16
13 libdispatch.dylib       0x12164 _dispatch_main_queue_callback_4CF + 916
14 CoreFoundation         0x7a698 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 12
15 CoreFoundation         0x74b18 __CFRunLoopRun + 2528
16 CoreFoundation         0x73bf4 CFRunLoopRunSpecific + 572
17 GraphicsServices        0x6afc GSEventRunModal + 160
18 UIKitCore           0xa9ccd0 -[UIApplication _run] + 1080
19 UIKitCore           0xaa20cc UIApplicationMain + 164
20 XXXXXXX          0xc474 (Missing UUID xxxxxxxxx…)
21 ???              0x1030e91d0 (Missing)

Boost

Answer 1

DTS Engineer OP

Apple

Feb ’22

I'm helping (hopefully) mssaranya6‍@‍gmail.com in this thread.

0

Answer 2

BlueFang OP

Mar ’22

I am also getting this crash. Same circumstances.

Starting up a video stream using AVPlayerViewController.

I also set up both a AVPlayerItem.status observer as well as a "timeControlStatus" observer.

Then when I change to a different stream, I remove the observers, stop the current stream using player.replaceCurrentItem(with:nil) - nil out properties holding on the playerItem & player properties.

Then start a new stream, creating all new playerItem (AVPlayerItem) & player (AVPlayer) objects.

Is there a known workaround or a way to prevent this crash? Am I doing something wrong? This current strategy has worked for years.

Getting reports from the customers about this crash.

0

Answer 3

Szu13 OP

May ’22

We are receiving the same crash. Just because of this crasher our crash-free users went down from 99.5% to 95%

0

Answer 4

Kurro OP

Dec ’22

Any solution to this?

0