All reports of copyright-refers-to-compressed-license for the archive. The extended description of this tag is:

The /usr/share/doc/pkg/copyright file refers to a standard license /usr/share/common-licenses/{GPL,LGPL,Artistic,BSD}.gz as a compressed file. Please update the reference (the licenses are installed uncompressed).

Severity: important, Certainty: certain

Check: copyright-file, Type: binary

This tag has not been emitted in any package tested by Lintian.