/usr/share/doc/libglib2.0-0-refdbg/AUTHORS is in libglib2.0-0-refdbg 2.48.0-1ubuntu4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libglib2.0-0-refdbg/../libglib2.0-0/AUTHORS
/usr/share/doc/libglib2.0-0-refdbg/../libglib2.0-0/AUTHORS