/usr/include/boost/ptr_container/detail/ is in libboost1.55-dev 1.55.0+dfsg-3.
This file is owned by root:root, with mode 0o755.
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/usr/include/boost/ptr_container/detail/associative_ptr_container.hpp
/usr/include/boost/ptr_container/detail/default_deleter.hpp
/usr/include/boost/ptr_container/detail/is_convertible.hpp
/usr/include/boost/ptr_container/detail/map_iterator.hpp
/usr/include/boost/ptr_container/detail/meta_functions.hpp
/usr/include/boost/ptr_container/detail/move.hpp
/usr/include/boost/ptr_container/detail/reversible_ptr_container.hpp
/usr/include/boost/ptr_container/detail/scoped_deleter.hpp
/usr/include/boost/ptr_container/detail/serialize_ptr_map_adapter.hpp
/usr/include/boost/ptr_container/detail/serialize_reversible_cont.hpp
/usr/include/boost/ptr_container/detail/serialize_xml_names.hpp
/usr/include/boost/ptr_container/detail/static_move_ptr.hpp
/usr/include/boost/ptr_container/detail/throw_exception.hpp
/usr/include/boost/ptr_container/detail/void_ptr_iterator.hpp