message: [crispy] LRUCache: Trying to fix LRUCache bug.
diff: @@ -170,15 +170,15 @@ class LRUCache
  {
  auto const oldKey = items_.back().first;
  auto i = itemByKeyMapping_.find(oldKey);
  - auto& itemPtr = i->second;
  + auto itemIterator = i->second;
  - itemByKeyMapping_.erase(oldKey);
  - itemByKeyMapping_.emplace(_newKey, itemPtr);
  + itemByKeyMapping_.erase(i);
  + itemByKeyMapping_.emplace(_newKey, itemIterator);
  - items_.splice(items_.begin(), items_, itemPtr);
  - itemPtr->first = _newKey;
  + items_.splice(items_.begin(), items_, itemIterator);
  + itemIterator->first = _newKey;
  - return itemPtr;
  + return itemIterator;
  }
  // private data
  