All reports of debhelper-compat-file-is-empty for the archive. The extended description of this tag is:
The source package has an empty debian/compat file. This is an error, the compat level of debhelper should be in there. Note that only the first line of the file is relevant.
Refer to the debhelper(7) manual page for details.
This tag has not been emitted in any package tested by Lintian.