What happened:
Sometimes syft can encounter a dpkg license where the regular expression used to match on contents cannot correctly identify the license.

In the following example we should find things like:

NVIDIA Software License Agreement and CUDA Supplement to Software License Agreement

Reads contents of copyright:

syft/syft/pkg/cataloger/debian/package.go

Lines 252 to 276 in ca945d1

	func fetchCopyrightContents(resolver file.Resolver, dbLocation file.Location, m pkg.DpkgDBEntry) (io.ReadCloser, *file.Location) {
	if resolver == nil {
	return nil, nil
	}
	// look for /usr/share/docs/NAME/copyright files
	copyrightPath := path.Join(docsPath, m.Package, "copyright")
	location := resolver.RelativeFileByPath(dbLocation, copyrightPath)
	// we may not have a copyright file for each package, ignore missing files
	if location == nil {
	return nil, nil
	}
	reader, err := resolver.FileContentsByLocation(*location)
	if err != nil {
	log.Warnf("failed to fetch deb copyright contents (package=%s): %s", m.Package, err)
	}
	defer internal.CloseAndLogError(reader, location.RealPath)
	l := location.WithAnnotation(pkg.EvidenceAnnotationKey, pkg.SupportingEvidenceAnnotation)
	return reader, &l
	}

Sends contents for parsing

Searches for license clause

What you expected to happen:
Given a copyright file is found SOME license information should be created for a given package. No licenses is a bug.

Steps to reproduce the issue:

syft -o json nvidia/cuda:12.5.1-cudnn-runtime-ubuntu20.04 | grant list -o json | jq -r '.results[]
 | [.license.license_id, .license.name] | @csv' | sed 's/"//g'

• Output of syft version: devel (tip of main)
• OS (e.g: cat /etc/os-release or similar): OSX