This file is indexed.

/usr/share/doc/libidl0/BUGS is in libidl0 0.8.14-0.2ubuntu4.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

1
2
3
4
5
- if an parse error occurs, memory will be leaked--implement an
  allocator and do a non-recursive free if parse fails

- IDL tree to IDL string will not properly escape identifiers that
  are keywords, generating bogus output without warning