Yes, because `bit_vector` has two constructors overloaded by constness of pointer:

- https://github.com/gintenlabo/jubatus/blob/a481e2993e9962f8803d5f16ff2cf14cbd8976e8/jubatus/core/table/column/bit_vector.hpp#L105
- https://github.com/gintenlabo/jubatus/blob/a481e2993e9962f8803d5f16ff2cf14cbd8976e8/jubatus/core/table/column/bit_vector.hpp#L110


But it's a bad design, so I'll fix `bit_vector`.