CombineExt
CombineExt copied to clipboard
Published
20 hours ago •
CombineCommunity
CombineCommunity
EXC_BREAKPOINT DemandBuffer.swift:111 BUG IN CLIENT OF LIBPLATFORM: Trying to recursively lock an os_unfair_lock
I've just received a huge amount of crash reports caused by an exception during theDemandBuffer deallocation on iOS 13.
CrashReporter Key: fdb68c604e035dc1461eb2f1d3466cd19894c442
Hardware Model: iPhone8,4
Role: Foreground
OS Version: iOS 13.5.1
Exception Type: EXC_BREAKPOINT
Exception Subtype: KERN_INVALID_ADDRESS
EXC_BREAKPOINT: BUG IN CLIENT OF LIBPLATFORM: Trying to recursively lock an os_unfair_lock
0 libsystem_platform.dylib __os_unfair_lock_recursive_abort
1 libsystem_platform.dylib __os_unfair_lock_lock_slow
2 Combine Publishers.ReceiveOn.Inner.receive(completion:)
3 Combine protocol witness for Subscriber.receive(completion:) in conformance Publishers.ReceiveOn<A, B>.Inner<A1>
4 Combine AnySubscriberBox.receive(completion:)
5 Combine protocol witness for Subscriber.receive(completion:) in conformance AnySubscriber<A, B>
6 HomeCodes flush (DemandBuffer.swift:111:24)
7 HomeCodes complete (DemandBuffer.swift:70:13)
8 HomeCodes receive (Sink.swift:75:20)
9 HomeCodes receive (CurrentValueRelay.swift:96:19)
10 HomeCodes partial apply for closure #1 in CurrentValueRelay.deinit (CurrentValueRelay.swift:55:36)
11 HomeCodes partial apply for thunk for @callee_guaranteed (@guaranteed CurrentValueRelay<A>.Subscription<CurrentValueSubject<A, Never>, AnySubscriber<A, Never>>) -> (@error @owned Error) (<compiler-generated>)
12 libswiftCore.dylib Sequence.forEach(_:)
13 HomeCodes deinit (CurrentValueRelay.swift:55:23)
14 HomeCodes deinit (CurrentValueRelay.swift)
15 libswiftCore.dylib __swift_release_dealloc
16 Combine PublisherBox.__deallocating_deinit
17 libswiftCore.dylib __swift_release_dealloc
18 Combine outlined destroy of Publishers.ReceiveOn<A, B>.Inner<A1>.State
19 Combine protocol witness for Cancellable.cancel() in conformance Publishers.ReceiveOn<A, B>.Inner<A1>
20 Combine Subscribers.Sink.cancel()
21 Combine protocol witness for Cancellable.cancel() in conformance Subscribers.Sink<A, B>
22 Combine partial apply
23 Combine AnyCancellable.__deallocating_deinit
24 libswiftCore.dylib __swift_release_dealloc
25 libswiftCore.dylib _swift_arrayDestroy
26 libswiftCore.dylib _SetStorage.deinit
27 libswiftCore.dylib _SetStorage.__deallocating_deinit
28 libswiftCore.dylib __swift_release_dealloc
29 libobjc.A.dylib object_cxxDestructFromClass(objc_object*, objc_class*)
30 libobjc.A.dylib _objc_destructInstance
31 libobjc.A.dylib __objc_rootDealloc
32 UIKitCore -[UIResponder dealloc]
33 UIKitCore -[UIViewController dealloc]
34 HomeCodes deinit (<compiler-generated>)
35 CoreFoundation ___RELEASE_OBJECTS_IN_THE_ARRAY__
36 CoreFoundation -[__NSArrayM dealloc]
37 UIKitCore -[UIViewController dealloc]
38 UIKitCore -[UINavigationController dealloc]
39 HomeCodes deinit (BaseCoordinator.swift)
40 HomeCodes deinit (NavigationCoordinator.swift)
41 HomeCodes deinit (BaseNavigationCoordinator.swift:32:5)
42 HomeCodes deinit (BaseNavigationCoordinator.swift)
43 libswiftCore.dylib __swift_release_dealloc
44 libswiftCore.dylib bool swift::RefCounts<swift::SideTableRefCountBits>::doDecrement<(swift::PerformDeinit)1>(unsigned int)
45 libswiftCore.dylib _swift_arrayDestroy
46 HomeCodes specialized Array.replaceSubrange<A>(_:with:) (HomeCodes)
47 HomeCodes BaseCoordinator.removeChildrenIfNeeded() (<compiler-generated>)
48 HomeCodes removeChildrenIfNeeded (<compiler-generated>)
49 HomeCodes childTransitionCompleted (Coordinator.swift:110:9)
50 HomeCodes childTransitionCompleted (<compiler-generated>)
51 HomeCodes partial apply for closure #1 in BaseCoordinator.registerParent(_:) (BaseCoordinator.swift:106:26)
52 HomeCodes removeChildrenIfNeeded (BaseCoordinator.swift:75:9)
53 HomeCodes removeChildrenIfNeeded (<compiler-generated>)
54 HomeCodes childTransitionCompleted (Coordinator.swift:110:9)
55 HomeCodes childTransitionCompleted (<compiler-generated>)
56 HomeCodes navigationController (NavigationAnimationDelegate.swift:136:22)
57 HomeCodes navigationController (<compiler-generated>)
58 UIKitCore -[UINavigationController navigationTransitionView:didEndTransition:fromView:toView:]
59 UIKitCore -[UINavigationTransitionView _notifyDelegateTransitionDidStopWithContext:]
60 UIKitCore -[UINavigationTransitionView _cleanupTransition]
61 UIKitCore +[UIView(UIViewAnimationWithBlocks) conditionallyAnimate:withAnimation:layout:completion:]
62 UIKitCore -[UINavigationTransitionView transition:fromView:toView:]
63 UIKitCore -[UINavigationController _startTransition:fromViewController:toViewController:]
64 UIKitCore -[UINavigationController _startDeferredTransitionIfNeeded:]
65 UIKitCore -[UINavigationController __viewWillLayoutSubviews]
66 UIKitCore -[UILayoutContainerView layoutSubviews]
67 UIKitCore -[UIView(CALayerDelegate) layoutSublayersOfLayer:]
68 QuartzCore -[CALayer layoutSublayers]
69 QuartzCore CA::Layer::layout_if_needed(CA::Transaction*)
70 UIKitCore -[UIView(Hierarchy) layoutBelowIfNeeded]
71 UIKitCore -[_UISheetPresentationController _sheetLayoutInfoLayout:]
72 UIKitCore -[_UISheetLayoutInfo _layout]
73 UIKitCore ___54-[_UISheetPresentationController transitionWillBegin:]_block_invoke_2
74 UIKitCore +[UIView(Animation) performWithoutAnimation:]
75 UIKitCore ___54-[_UISheetPresentationController transitionWillBegin:]_block_invoke.341
76 UIKitCore -[_UIViewControllerTransitionCoordinator _applyBlocks:releaseBlocks:]
77 UIKitCore -[_UIViewControllerTransitionContext __runAlongsideAnimations]
78 UIKitCore ___63+[UIView(Animation) _setAlongsideAnimations:toRunByEndOfBlock:]_block_invoke
79 UIKitCore -[UIViewAnimationState _runAlongsideAnimations]
80 UIKitCore -[UIViewAnimationState pop]
81 UIKitCore +[UIViewAnimationState popAnimationState]
82 UIKitCore +[UIView(UIViewAnimationWithBlocks) _setupAnimationWithDuration:delay:view:options:factory:animations:start:animationStateGenerator:completion:]
83 UIKitCore +[UIView(UIViewAnimationWithBlocks) animateWithDuration:delay:options:animations:completion:]
84 UIKitCore ___50-[UITransitionView _startTransition:withDuration:]_block_invoke.169
85 UIKitCore +[UIView(UIViewAnimationWithBlocks) conditionallyAnimate:withAnimation:layout:completion:]
86 UIKitCore -[UITransitionView _startTransition:withDuration:]
87 UIKitCore -[UITransitionView transition:fromView:toView:removeFromView:]
88 UIKitCore -[UIViewControllerBuiltinTransitionViewAnimator animateTransition:]
89 UIKitCore ____UIViewControllerTransitioningRunCustomTransition_block_invoke_2
90 UIKitCore +[UIInputResponderController _pinInputViewsForInputResponderController:onBehalfOfResponder:duringBlock:]
91 UIKitCore ____UIViewControllerTransitioningRunCustomTransition_block_invoke.645
92 UIKitCore +[UIView(Animation) _setAlongsideAnimations:toRunByEndOfBlock:]
93 UIKitCore __UIViewControllerTransitioningRunCustomTransition
94 UIKitCore ___56-[UIPresentationController runTransitionForCurrentState]_block_invoke.465
95 UIKitCore __runAfterCACommitDeferredBlocks
96 UIKitCore __cleanUpAfterCAFlushAndRunDeferredBlocks
97 UIKitCore __afterCACommitHandler
98 CoreFoundation ___CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__
99 CoreFoundation ___CFRunLoopDoObservers
100 CoreFoundation ___CFRunLoopRun
101 CoreFoundation _CFRunLoopRunSpecific
102 GraphicsServices _GSEventRunModal
103 UIKitCore _UIApplicationMain
104 HomeCodes main (main.swift:8:1)
105 libdyld.dylib _start
I've tried to repro it and it looks like it just enough to create a publisher that uses DemandBuffer (e.g. CurrentValueRelay), initialise it and the just deinit it. And it looks like it only reproducible on iOS 13.5 and older.
Did anyone else had the same issue?
Does it happen with operators that use DemandBuffer? Or is it just CurrentValueRelay?
@freak4pc I've managed to repro it with CurrentValueRelay, .share(replay:) and PassthroughRelay.
Those all use Relays I believe. Would be interesting to see if it happens with just random non-subject/relay operators.
Hi, I've started having those kind of errors as well using a ReplaySubject. Is this still a main topic ?
I unfortunately don't have the time to debug this anytime soon, but happy to review a PR if anyone wants to dig into this and find a trustworthy fix.
Thanks!
@dsk1306 sorry to awaken this thread but any change you have an example that can reproduce this somewhere ? I know it's been a while but seems like this is still happening.
@freak4pc Sorry, we dropped iOS 13 support in our app 🤷🏻♂️ So I cannot provide any more details.
Same issue on iOS 17.2.1
Crashed: com.apple.main-thread
0 libsystem_platform.dylib 0x620c _os_unfair_lock_recursive_abort + 36
1 libsystem_platform.dylib 0x3348 _os_unfair_lock_lock_slow + 284
2 Combine 0x27858 AbstractCombineLatest.cancel() + 64
3 Combine 0x2780c protocol witness for Cancellable.cancel() in conformance AbstractCombineLatest<A, B, C> + 24
4 Combine 0x27660 Subscribers.Sink.cancel() + 636
5 Combine 0x273d8 protocol witness for Cancellable.cancel() in conformance Subscribers.Sink<A, B> + 24
6 Combine 0x272ec AnyCancellable.cancel() + 212
7 Combine 0x271dc AnyCancellable.__deallocating_deinit + 16
8 libswiftCore.dylib 0x3a6914 _swift_release_dealloc + 56
9 libswiftCore.dylib 0x3a7fb0 bool swift::RefCounts<swift::RefCountBitsT<(swift::RefCountInlinedness)1> >::doDecrementSlow<(swift::PerformDeinit)1>(swift::RefCountBitsT<(swift::RefCountInlinedness)1>, unsigned int) + 136
10 libswiftCore.dylib 0x393298 swift_arrayDestroy + 124
11 libswiftCore.dylib 0x1d7acc _SetStorage.deinit + 220
12 libswiftCore.dylib 0x1d7b30 _SetStorage.__deallocating_deinit + 16
13 libswiftCore.dylib 0x3a6914 _swift_release_dealloc + 56
14 libswiftCore.dylib 0x3a7fb0 bool swift::RefCounts<swift::RefCountBitsT<(swift::RefCountInlinedness)1> >::doDecrementSlow<(swift::PerformDeinit)1>(swift::RefCountBitsT<(swift::RefCountInlinedness)1>, unsigned int) + 136
15 Tangem 0x586dc0 main + 4457564
16 libswiftCore.dylib 0x3a6914 _swift_release_dealloc + 56
17 libswiftCore.dylib 0x3a7fb0 bool swift::RefCounts<swift::RefCountBitsT<(swift::RefCountInlinedness)1> >::doDecrementSlow<(swift::PerformDeinit)1>(swift::RefCountBitsT<(swift::RefCountInlinedness)1>, unsigned int) + 136
18 Tangem 0x2c9f38 main + 1586644
19 Tangem 0x2c9fac main + 1586760
20 libswiftCore.dylib 0x3a6914 _swift_release_dealloc + 56
21 libswiftCore.dylib 0x3a7fb0 bool swift::RefCounts<swift::RefCountBitsT<(swift::RefCountInlinedness)1> >::doDecrementSlow<(swift::PerformDeinit)1>(swift::RefCountBitsT<(swift::RefCountInlinedness)1>, unsigned int) + 136
22 Tangem 0x4888b4 main + 3415888
23 libswiftCore.dylib 0x3a6914 _swift_release_dealloc + 56
24 libswiftCore.dylib 0x3a7fb0 bool swift::RefCounts<swift::RefCountBitsT<(swift::RefCountInlinedness)1> >::doDecrementSlow<(swift::PerformDeinit)1>(swift::RefCountBitsT<(swift::RefCountInlinedness)1>, unsigned int) + 136
25 Tangem 0x488224 main + 3414208
26 libswiftCore.dylib 0x3a6914 _swift_release_dealloc + 56
27 libswiftCore.dylib 0x3a7fb0 bool swift::RefCounts<swift::RefCountBitsT<(swift::RefCountInlinedness)1> >::doDecrementSlow<(swift::PerformDeinit)1>(swift::RefCountBitsT<(swift::RefCountInlinedness)1>, unsigned int) + 136
28 Tangem 0x488224 main + 3414208
29 libswiftCore.dylib 0x3a6914 _swift_release_dealloc + 56
30 libswiftCore.dylib 0x3a7fb0 bool swift::RefCounts<swift::RefCountBitsT<(swift::RefCountInlinedness)1> >::doDecrementSlow<(swift::PerformDeinit)1>(swift::RefCountBitsT<(swift::RefCountInlinedness)1>, unsigned int) + 136
31 Tangem 0x411fec main + 2930312
32 libswiftCore.dylib 0x393298 swift_arrayDestroy + 124
33 libswiftCore.dylib 0x9c5a4 _ContiguousArrayStorage.__deallocating_deinit + 96
34 libswiftCore.dylib 0x3a6914 _swift_release_dealloc + 56
35 libswiftCore.dylib 0x3a7fb0 bool swift::RefCounts<swift::RefCountBitsT<(swift::RefCountInlinedness)1> >::doDecrementSlow<(swift::PerformDeinit)1>(swift::RefCountBitsT<(swift::RefCountInlinedness)1>, unsigned int) + 136
36 Tangem 0x5a0354 main + 4561392
37 libswiftCore.dylib 0x393298 swift_arrayDestroy + 124
38 libswiftCore.dylib 0x9c5a4 _ContiguousArrayStorage.__deallocating_deinit + 96
39 libswiftCore.dylib 0x3a6914 _swift_release_dealloc + 56
40 libswiftCore.dylib 0x3a7fb0 bool swift::RefCounts<swift::RefCountBitsT<(swift::RefCountInlinedness)1> >::doDecrementSlow<(swift::PerformDeinit)1>(swift::RefCountBitsT<(swift::RefCountInlinedness)1>, unsigned int) + 136
41 libswiftCore.dylib 0x3a9fe4 swift::metadataimpl::ValueWitnesses<swift::metadataimpl::BridgeObjectBox>::assignWithTake(swift::OpaqueValue*, swift::OpaqueValue*, swift::TargetMetadata<swift::InProcess> const*) + 36
42 libswiftCore.dylib 0x3c6e30 swift::metadataimpl::OpaqueExistentialBox<0u>::Container* swift::metadataimpl::OpaqueExistentialBoxBase::assignWithTake<swift::metadataimpl::OpaqueExistentialBox<0u>::Container>(swift::metadataimpl::OpaqueExistentialBox<0u>::Container*, swift::metadataimpl::OpaqueExistentialBox<0u>::Container*) + 568
43 libswiftCore.dylib 0x37fc54 assignWithTake for ClosedRange<>.Index + 336
44 Combine 0x917c outlined assign with take of Subscription? + 84
45 Combine 0xd768 AbstractCombineLatest.receive(_:index:) + 456
46 Combine 0xd57c AbstractCombineLatest.Side.receive(_:) + 112
47 Combine 0x19434 Publishers.Map.Inner.receive(_:) + 200
48 Combine 0x19434 Publishers.Map.Inner.receive(_:) + 200
49 Combine 0xd940 AbstractCombineLatest.receive(_:index:) + 928
50 Combine 0xd57c AbstractCombineLatest.Side.receive(_:) + 112
51 Combine 0x19434 Publishers.Map.Inner.receive(_:) + 200
52 Combine 0x29808 Publishers.Autoconnect.Inner.receive(_:) + 52
53 Combine 0x29764 Publishers.Multicast.Inner.receive(_:) + 236
54 Combine 0x2966c protocol witness for Subscriber.receive(_:) in conformance Publishers.Multicast<A, B>.Inner<A1> + 24
55 Combine 0x29648 AnySubscriberBox.receive(_:) + 108
56 Combine 0x295d0 protocol witness for Subscriber.receive(_:) in conformance AnySubscriber<A, B> + 56
57 CombineExt 0xbcf8 DemandBuffer.buffer(value:) + 51 (DemandBuffer.swift:51)
58 CombineExt 0x17afc ReplaySubject.Subscription.forwardValueToBuffer(_:) + 134 (ReplaySubject.swift:134)
59 CombineExt 0x18ee0 partial apply for closure #1 in ReplaySubject.send(_:) + 32
60 CombineExt 0x18e9c partial apply for closure #1 in ReplaySubject.send(_:) + 20
61 libswiftCore.dylib 0xdd538 Sequence.forEach(_:) + 740
62 CombineExt 0x17a68 ReplaySubject.send(_:) + 57 (ReplaySubject.swift:57)
63 Combine 0x1a1c8 SubjectSubscriber.receive(_:) + 188
64 Combine 0x1a0fc protocol witness for Subscriber.receive(_:) in conformance SubjectSubscriber<A> + 24
65 Combine 0xd448 FilterProducer.receive(_:) + 2520
66 Combine 0xca64 protocol witness for Subscriber.receive(_:) in conformance FilterProducer<A, B, C, D, E> + 24
67 Combine 0x56a4 closure #1 in Publishers.ReceiveOn.Inner.receive(_:) + 276
68 libswiftDispatch.dylib 0xe5d8 thunk for @escaping @callee_guaranteed () -> () + 36
69 libdispatch.dylib 0x26a8 _dispatch_call_block_and_release + 32
70 libdispatch.dylib 0x4300 _dispatch_client_callout + 20
71 libdispatch.dylib 0x12998 _dispatch_main_queue_drain + 984
72 libdispatch.dylib 0x125b0 _dispatch_main_queue_callback_4CF + 44
73 CoreFoundation 0x3701c __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 16
74 CoreFoundation 0x33d28 __CFRunLoopRun + 1996
75 CoreFoundation 0x33478 CFRunLoopRunSpecific + 608
76 GraphicsServices 0x34f8 GSEventRunModal + 164
77 UIKitCore 0x22c62c -[UIApplication _run] + 888
78 UIKitCore 0x22bc68 UIApplicationMain + 340
79 Tangem 0x1469a4 main + 64
80 ??? 0x1bb32adcc (Missing)
