In file included from /in/driver/main.cpp:5:0:
/in/hashtable.hpp: In member function 'void HashTable<Key, Value, Hash, KeyEqual>::rehash(size_t)':
/in/hashtable.hpp:435:17: error: 'new_table' was not declared in this scope
                 new_table.insert(node.first, node.second);
                 ^~~~~~~~~
/in/hashtable.hpp:435:17: note: suggested alternative: 'newlocale'
                 new_table.insert(node.first, node.second);
                 ^~~~~~~~~
                 newlocale