ComponentKit/TransactionalDataSources/Common/Internal/CKDataSourceChangesetModification.mm [123:142]:
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    if (indexPath.section >= newSections.count) {
      CKCFatalWithCategory(CKHumanReadableInvalidChangesetOperationType(CKInvalidChangesetOperationTypeUpdate),
                           @"Invalid section: %lu (>= %lu). Changeset: %@, user info: %@, state: %@",
                           (unsigned long)indexPath.section,
                           (unsigned long)newSections.count,
                           _changeset,
                           _userInfo,
                           oldState);
    }
    NSMutableArray *const section = newSections[indexPath.section];
    if (indexPath.item >= section.count) {
      CKCFatalWithCategory(CKHumanReadableInvalidChangesetOperationType(CKInvalidChangesetOperationTypeUpdate),
                           @"Invalid item: %lu (>= %lu). Changeset: %@, user info: %@, state: %@",
                           (unsigned long)indexPath.item,
                           (unsigned long)section.count,
                           _changeset,
                           _userInfo,
                           oldState);
    }
    CKDataSourceItem *const oldItem = section[indexPath.item];
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ComponentKit/TransactionalDataSources/Common/Internal/CKDataSourceSplitChangesetModification.mm [122:141]:
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      if (indexPath.section >= newSections.count) {
        CKCFatalWithCategory(CKHumanReadableInvalidChangesetOperationType(CKInvalidChangesetOperationTypeUpdate),
                             @"Invalid section: %lu (>= %lu). Changeset: %@, user info: %@, state: %@",
                             (unsigned long)indexPath.section,
                             (unsigned long)newSections.count,
                             _changeset,
                             _userInfo,
                             oldState);
      }
      NSMutableArray *const section = newSections[indexPath.section];
      if (indexPath.item >= section.count) {
        CKCFatalWithCategory(CKHumanReadableInvalidChangesetOperationType(CKInvalidChangesetOperationTypeUpdate),
                             @"Invalid item: %lu (>= %lu). Changeset: %@, user info: %@, state: %@",
                             (unsigned long)indexPath.item,
                             (unsigned long)section.count,
                             _changeset,
                             _userInfo,
                             oldState);
      }
      CKDataSourceItem *const oldItem = section[indexPath.item];
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