/usr/share/gauche-0.9/0.9.1/lib/util/ is in gauche 0.9.1-5.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gauche-0.9/0.9.1/lib/util/combinations.scm
/usr/share/gauche-0.9/0.9.1/lib/util/digest.scm
/usr/share/gauche-0.9/0.9.1/lib/util/isomorph.scm
/usr/share/gauche-0.9/0.9.1/lib/util/lcs.scm
/usr/share/gauche-0.9/0.9.1/lib/util/list.scm
/usr/share/gauche-0.9/0.9.1/lib/util/match.scm
/usr/share/gauche-0.9/0.9.1/lib/util/queue.scm
/usr/share/gauche-0.9/0.9.1/lib/util/rbtree.scm
/usr/share/gauche-0.9/0.9.1/lib/util/record.scm
/usr/share/gauche-0.9/0.9.1/lib/util/relation.scm
/usr/share/gauche-0.9/0.9.1/lib/util/sparse.scm
/usr/share/gauche-0.9/0.9.1/lib/util/stream.scm
/usr/share/gauche-0.9/0.9.1/lib/util/toposort.scm
/usr/share/gauche-0.9/0.9.1/lib/util/tree.scm
/usr/share/gauche-0.9/0.9.1/lib/util/trie.scm