This file is indexed.

/usr/lib/x86_64-linux-gnu/libxcb-glx.so is in libxcb-glx0-dev 1.13-1.

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

It is a symlink to /usr/lib/x86_64-linux-gnu/libxcb-glx.so.0.0.0