AgensGraph crashes on list comprehension with `sum()` inside expression

[zihaozeng0021]

Configuration

AgensGraph Version: bitnine/agensgraph:latest (pulled 2025-12-27)

Operating System: WSL2 – Ubuntu 24.04.1 LTS

Installation Method: Docker (bitnine/agensgraph:latest)

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Steps to reproduce

1. Start AgensGraph via Docker

docker run -d \
  --name agensgraph \
  -p 5432:5432 \
  -e POSTGRES_PASSWORD=agensgraph \
  bitnine/agensgraph:latest

2. Connect with psql

docker exec -it agensgraph psql -U postgres

3. Run the following query

Set up

CREATE GRAPH test;

SET graph_path = test;

The buggy query:

postgres=# RETURN [x IN [1,2,3] | sum(x)];
server closed the connection unexpectedly
        This probably means the server terminated abnormally
        before or while processing the request.
The connection to the server was lost. Attempting reset: Failed.
!?>

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Expected behaviour

The server should not terminate. It should either:

• return a valid result, or
• return a clean syntax/semantic error (e.g., “aggregations not allowed here”), without dropping the connection.

Actual behaviour

psql loses the connection because the server terminates while processing the quer