All reports of debug-file-should-use-detached-symbols for the archive. The extended description of this tag is:
This file is in a location generally used for detached debugging symbols, but it appears to contain a complete copy of the executable or library instead of only the debugging symbols. Files in subdirectories of /usr/lib/debug mirroring the main file system should contain only debugging information generated by objcopy --only-keep-debug. Binaries or shared objects built with extra debugging should be installed directly in /usr/lib/debug or in subdirectories corresponding to the package, not in the directories that mirror the main file system.
If you are using dh_strip with the --dbg-package flag, don't also install the library in /usr/lib/debug. dh_strip does all the work for you.
Refer to Debian Developer's Reference section 6.7.9 (Best practices for debug packages) for details.
This tag has not been emitted in any package tested by Lintian.