[IGListBatchUpdateTransaction _applyDiff:] Crash

[EasefulLay]

Hello: Our application has occasional crashes when using IGList. We are unable to reproduce it ourselves. Please help us. Thank you

0  CoreFoundation                 0x2d5fc __exceptionPreprocess
1  libobjc.A.dylib                0x31244 objc_exception_throw
2  Foundation                     0x82dec0 _userInfoForFileAndLine
3  UIKitCore                      0x9aa674 -[UICollectionView _Bug_Detected_In_Client_Of_UICollectionView_Invalid_Number_Of_Items_In_Section:]
4  UIKitCore                      0x20b750 -[UICollectionView _endItemAnimationsWithInvalidationContext:tentativelyForReordering:animator:collectionViewAnimator:]
5  UIKitCore                      0x1f080c -[UICollectionView _performBatchUpdates:completion:invalidationContext:tentativelyForReordering:animator:animationHandler:]
6  IGListKit                      0xe688 __43-[IGListBatchUpdateTransaction _applyDiff:]_block_invoke.4 + 190 (IGListBatchUpdateTransaction.m:190)
7  UIKitCore                      0x28828 +[UIView(Animation) performWithoutAnimation:]
8  IGListKit                      0xe450 -[IGListBatchUpdateTransaction _applyDiff:] + 192 (IGListBatchUpdateTransaction.m:192)
9  IGListKit                      0xe0cc -[IGListBatchUpdateTransaction _didDiff:onBackground:] + 155 (IGListBatchUpdateTransaction.m:155)
10 IGListKit                      0xdcf8 -[IGListBatchUpdateTransaction _diff] + 124 (IGListBatchUpdateTransaction.m:124)
11 IGListKit                      0xbd98 -[IGListAdapterUpdater update] + 124 (IGListAdapterUpdater.m:124)
12 IGListKit                      0xbbc4 __44-[IGListAdapterUpdater _queueUpdateIfNeeded]_block_invoke + 73 (IGListAdapterUpdater.m:73)
13 libdispatch.dylib              0x2248 _dispatch_call_block_and_release
14 libdispatch.dylib              0x3fa8 _dispatch_client_callout
15 libdispatch.dylib              0x12a34 _dispatch_main_queue_drain
16 libdispatch.dylib              0x1264c _dispatch_main_queue_callback_4CF
17 CoreFoundation                 0x79bcc __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__
18 CoreFoundation                 0x761c0 __CFRunLoopRun
19 CoreFoundation                 0xc8284 CFRunLoopRunSpecific
20 GraphicsServices               0x14c0 GSEventRunModal
21 UIKitCore                      0x3ee674 -[UIApplication _run]
22 UIKitCore                      0x14e88 UIApplicationMain
23 UIKitCore                      0x75115c keypath_get_selector_hoverStyle
24 Olight                         0x82240 main (AppDelegate.swift)

[EasefulLay]

system version ：18.3.1-18.4.0

[TimOliver]

Hi @EasefulLay! We'll need a bit more information before we can help! The error in that stack trace is saying Invalid_Number_Of_Items_In_Section so I'm wondering if there's an issue in your section controller there.

Are you able to share more details, or any code snippets? Thanks!