All reports of license-problem-gfdl-invariants for the archive. The extended description of this tag is:

The given source file is licensed under GFDL with invariant section or front-cover or back-cover text.

GFDL with invariant sections, front-cover or back-cover texts are not suitable for main.

Refer to and for details.

Severity: serious, Certainty: possible

Check: cruft, Type: source

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