In file included from /in/driver/main.cpp:5:0:
/in/hashtable.hpp: In member function 'bool HashTable<Key, Value, Hash, KeyEqual>::insert(const Key&, const Value&)':
/in/hashtable.hpp:322:9: error: no return statement in function returning non-void [-Werror=return-type]
         }
         ^
cc1plus: all warnings being treated as errors