/usr/share/lua/5.2/mmdb/init.lua is in lua-mmdb 0.1-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/lua/5.2/mmdb/../../5.1/mmdb/init.lua
/usr/share/lua/5.2/mmdb/../../5.1/mmdb/init.lua