This file is indexed.

/usr/lib/x86_64-linux-gnu/liblua5.1-posix.so.1 is in lua-posix 29-7ubuntu1.

This file is owned by root:root, with mode 0o777.

It is a symlink to /usr/lib/x86_64-linux-gnu/liblua5.1-posix.so.1.0.0