Grype exist with error on JSON output with PURL input

[chovanecadam]

What happened:

When scanning a file of PURLs or a single PURL and setting output format to json, Grype panics.

What you expected to happen:

Grype does not panic and creates the outputs.

How to reproduce it (as minimally and precisely as possible):

podman run --rm --name Grype -v grypedb:/.cache/grype docker.io/anchore/grype:v0.86.1 'pkg:deb/debian/[email protected]?arch=amd64&distro=debian-12' -o json=/dev/stdout
[0000]  WARN unable to determine GOPATH or user home dir: %!w(string=exec: "getent": executable file not found in $PATH)
[0000] ERROR 1 error occurred:
        * unable to write result: unable to encode result: unsupported source: pkg.PURLLiteralMetadata

Anything else we need to know?:

This is a regression in 0.86.1, because version 0.86.0 is not affected. Most probably a result of fixing #2324. I wish there was a testing infrastructure that runs some basic checks like this one in Docker to catch these regressions.

Environment:

• Output of grype version: 0.86.1
• OS (e.g: cat /etc/os-release or similar):