One of our views that contains a UICollectionView started crashing once in a while with the following descriptive error:
libc++abi.dylib: terminating with uncaught exception of type NSException
Stack trace was not very helpful.
Most of the uncaught exception in a collection view occur when it is being partially reloaded (insertItems, reloadItems, reloadSections, etc.) and its data-source is not what it expects to be.
In our case, we re-used the same collection view and did not run
self.collectionView.reloadData() before each re-use so adding that line of code fixed the issue.
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