YGY-001 opened a new issue, #2534:
URL: https://github.com/apache/age/issues/2534
Docker image `apache/age:release_PG18_1.7.0
**Reproduction**
```sql
LOAD 'age';
SET search_path = ag_catalog, public;
SELECT ag_catalog.create_graph('age_issue_case8_reduced');
SELECT *
FROM ag_catalog.cypher('age_issue_case8_reduced', $$
UNWIND [] AS x
MERGE (n)
WITH x, head(range(9, 23)) AS y
WHERE y IS NULL
RETURN {x: x, y: y} AS row
$$) AS (row agtype);
```
**Expected**
The empty input produces zero rows. The query completes normally, returns
zero rows, and does not create a vertex or terminate the PostgreSQL backend.
**Actual**
```text
server closed the connection unexpectedly
client backend ... was terminated by signal 11: Segmentation fault
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