Comments (2)
nolanw
commented on June 12, 2024
This looks like the same crash as ra1028/DiffableDataSources#28.
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nolanw
commented on June 12, 2024
I'm suspicious of IBPCollectionViewCompositionalLayout not returning attributes for orthogonally-scrolling section items from -layoutAttributesForElementsInRect: and -layoutAttributesForItemAtIndexPath:. The iOS 11 crash backtrace looks like this:
#0 0x0000000104fbd001 in objc_exception_throw ()
#1 0x00000001059680bc in _CFThrowFormattedException ()
#2 0x000000010583b72a in -[__NSDictionaryM setObject:forKey:] ()
#3 0x0000000106f87f07 in -[UICollectionView _setVisibleView:forLayoutAttributes:] ()
#4 0x0000000106fa0dcb in __71-[UICollectionView _updateWithItems:tentativelyForReordering:animator:]_block_invoke.1997 ()
#5 0x000000010657c537 in +[UIView(UIViewAnimationWithBlocks) _setupAnimationWithDuration:delay:view:options:factory:animations:start:animationStateGenerator:completion:] ()
#6 0x000000010657ca0f in +[UIView(UIViewAnimationWithBlocks) animateWithDuration:delay:options:animations:completion:] ()
#7 0x0000000106fa00f5 in -[UICollectionView _updateWithItems:tentativelyForReordering:animator:] ()
#8 0x0000000106f99cc3 in -[UICollectionView _endItemAnimationsWithInvalidationContext:tentativelyForReordering:animator:] ()
#9 0x0000000106f95554 in -[UICollectionView _updateRowsAtIndexPaths:updateAction:updates:] ()
and seems to happen when the collection view gets nil for an attributes's index path, then tries to use that nil index path as a key in a dictionary.
For what it's worth, UIKit's layout does return attributes instances for orthogonally-scrolling sections.
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Related Issues (20)
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- visibleCells is empty in iOS 12 HOT 2
- [New Feature Request] Add New Feature in iOS 14 HOT 2
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- [Crash]Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'no UICollectionViewLayoutAttributes instance for -layoutAttributesForDecorationViewOfKindOfKind:
- [Crash] Thread 1: EXC_ARITHMETIC (code=EXC_I386_DIV, subcode=0x0)
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