BlankNodes have value undefinedNaN

[smessie]

When dereferencing some file with blank nodes, the blank nodes have value undefinedNaN:

Quad {
  termType: 'Quad',
  value: '',
  subject: BlankNode { termType: 'BlankNode', value: 'undefinedNaN' },
  predicate: NamedNode {
    termType: 'NamedNode',
    value: 'http://www.w3.org/1999/02/22-rdf-syntax-ns#rest'
  },
  object: BlankNode { termType: 'BlankNode', value: 'undefinedNaN' },
  graph: DefaultGraph { termType: 'DefaultGraph', value: '' }
}

Small reproducible example:

const { rdfDereferencer } = require("rdf-dereference");

async function main() {
    const {data} = await rdfDereferencer.dereference(
        "https://raw.githubusercontent.com/TREEcg/extract-cbd-shape/refs/heads/main/tests/01%20-%20fetching%20a%20shacl%20shape/shacl-shacl.ttl",
        {localFiles: true},
    )

    data.on('data', (quad) => console.log(quad))
        .on('error', (error) => console.error(error))
        .on('end', () => console.log('All done!'));

}

main().catch(console.error);

This contains quads that have blank nodes with value undefinedNaN like the above one.

[rubensworks]

@surilindur Didn't we also see errors like these in the VAIA exercises?
Could you have a look at it as well?

[rubensworks]

I can reproduce it in comunica with just a construct query, so there's definitely an underlying issue.

[rubensworks]

For reference, tracked this down as a problem in N3.js: rdfjs/N3.js#466