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I have a probabilistic crash in my app, detailed as follows,0 CoreFoundation ___exceptionPreprocess + 228 1 libobjc.A.dylib objc_exception_throw + 56 2 Photos -[PHPhotoLibrary recordInsertRequest:] 3 Photos -[PHChangeRequestHelper initWithUUID:objectID:changeRequest:] + 136 4 Photos -[PHAssetCollectionChangeRequest initWithUUID:objectID:] + 140 5 Photos +[PHAssetCollectionChangeRequest _changeRequestForAssetCollection:optionalAssets:] + 180and my code detailed as follows, __block NSString *localIdentifier = nil; [[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{ PHAssetCollectionChangeRequest *collectionRequest = nil; PHFetchResult <PHAssetCollection *>*result = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeAlbum subtype:PHAssetCollectionSubtypeAlbumRegular options:nil]; for (PHAssetCollection *assetCollection in result) { if ([assetCollection.localizedTitle isEqualToString:albumName]) { if ([assetCollection canPerformEditOperation:PHCollectionEditOperationCreateContent]) { collectionRequest = [PHAssetCollectionChangeRequest changeRequestForAssetCollection:assetCollection]; break; } } } } completionHandler:^(BOOL success, NSError * _Nullable error) { }];before run this code, i have the strict logical control to get album permission, and i have followed the api advice,// if the asset collection does not allow the type of change requested, these methods will raise an exception, call canPerformEditOperation: on the asset collection to determine if the type of edit operation is allowed.but it is does not work, and the crash are still happened, and https://forums.developer.apple.com/message/155809#155809is not what i wanted.Does anyone have the same problems? i really appreciate any help…