/usr/share/lua/5.2/luxio/socket.lua is in lua-luxio 12-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/lua/5.2/luxio/../../5.1/luxio/socket.lua
/usr/share/lua/5.2/luxio/../../5.1/luxio/socket.lua