Bug: Segmentation fault on label() of list element

[Brad-Edwards]

Imported from kuzudb/kuzu#6050
Original URL: kuzudb#6050
Original author: @mdbenito
Original created at: 2025-10-07T17:12:58Z

Kuzu version

v0.11.2

What operating system are you using?

Ubuntu 24.04

What happened?

With the following data:

CREATE NODE TABLE Person(name STRING PRIMARY KEY, occupation STRING);
CREATE REL TABLE LivesWith(FROM Person TO Person);
CREATE (p:Person {name: 'Alice'})-[:LivesWith]->(:Person {name: 'Bob'});

It is possible to extract a label from the path with:

MATCH p = (n)-[:LivesWith]->(m:Person {name: 'Bob'})
WITH nodes(p) AS ns
RETURN properties(ns, "_LABEL")[1];

But the following segfaults:

MATCH p = (n)-[:LivesWith]->(m:Person {name: 'Bob'})
WITH nodes(p) AS ns
RETURN label(ns[1]);