/usr/include/libint2/boost/preprocessor/list/ is in libint2-dev 2.3.0~beta3-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/libint2/boost/preprocessor/list/adt.hpp
/usr/include/libint2/boost/preprocessor/list/append.hpp
/usr/include/libint2/boost/preprocessor/list/at.hpp
/usr/include/libint2/boost/preprocessor/list/cat.hpp
/usr/include/libint2/boost/preprocessor/list/detail/
/usr/include/libint2/boost/preprocessor/list/detail/dmc/
/usr/include/libint2/boost/preprocessor/list/detail/dmc/fold_left.hpp
/usr/include/libint2/boost/preprocessor/list/detail/edg/
/usr/include/libint2/boost/preprocessor/list/detail/edg/fold_left.hpp
/usr/include/libint2/boost/preprocessor/list/detail/edg/fold_right.hpp
/usr/include/libint2/boost/preprocessor/list/detail/fold_left.hpp
/usr/include/libint2/boost/preprocessor/list/detail/fold_right.hpp
/usr/include/libint2/boost/preprocessor/list/enum.hpp
/usr/include/libint2/boost/preprocessor/list/filter.hpp
/usr/include/libint2/boost/preprocessor/list/first_n.hpp
/usr/include/libint2/boost/preprocessor/list/fold_left.hpp
/usr/include/libint2/boost/preprocessor/list/fold_right.hpp
/usr/include/libint2/boost/preprocessor/list/for_each.hpp
/usr/include/libint2/boost/preprocessor/list/for_each_i.hpp
/usr/include/libint2/boost/preprocessor/list/for_each_product.hpp
/usr/include/libint2/boost/preprocessor/list/rest_n.hpp
/usr/include/libint2/boost/preprocessor/list/reverse.hpp
/usr/include/libint2/boost/preprocessor/list/size.hpp
/usr/include/libint2/boost/preprocessor/list/to_array.hpp
/usr/include/libint2/boost/preprocessor/list/to_seq.hpp
/usr/include/libint2/boost/preprocessor/list/to_tuple.hpp
/usr/include/libint2/boost/preprocessor/list/transform.hpp