All reports of library-in-root-and-usr for the archive. The extended description of this tag is:
The package ships two files with the same name installed both in /lib*/ and /usr/lib*/ (or their subdirectories). This is not useful and is incompatible with the merged /usr directories scheme.
Shared library files, both static and dynamic, must be installed in the correct directories as documented in Policy 8.1.
Refer to https://wiki.debian.org/UsrMerge and Debian Policy Manual section 8.1 (Run-time shared libraries) for details.
This tag has not been emitted in any package tested by Lintian.