/usr/share/lua/5.2/compat53/init.lua is in lua-compat53 0.3-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/lua/5.2/compat53/../../5.1/compat53/init.lua
/usr/share/lua/5.2/compat53/../../5.1/compat53/init.lua