XCode9.3.1闪退

在创建群聊选则好友的时候，无论怎么选，选第二个好友的时候就会crash：Attempted to dequeue multiple cells for the same index path, which is not allowed. If you really need to dequeue more cells than the table view is requesting, use the -dequeueReusableCellWithIdentifier: method (without an index path). Cell identifier: LCCKContactListViewControllerIdentifier, index path: {length = 2, path = 0 - 0}'
打印出的indexPath.row和indexPath.section都是nil,XCode升级前是正常的。