This file is indexed.

/usr/lib/libgtksourceviewmm-3.0.so.0 is in libgtksourceviewmm-3.0-0 3.2.0-1ubuntu1.

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

It is a symlink to /usr/lib/libgtksourceviewmm-3.0.so.0.0.0