This file is indexed.

/usr/share/doc/texmf/ is in luatex 0.70.1-1ubuntu1.

This file is owned by root:root, with mode 0o755.

File Mime Type Owner Mode Size
..
/usr/share/doc/texmf/luatex/ root:root 0o755
/usr/share/doc/texmf/luatex/base/ root:root 0o755
/usr/share/doc/texmf/luatex/base/luatexref-t.pdf root:root 0o777