Cursor crash when reaching query_timeout

[hwc0919]

When query with cursor, following code will crash.

import { Pool, PoolClient, escapeIdentifier } from 'pg';
import Cursor from 'pg-cursor';

const dbConfig = parse('postgresql://postgres@localhost/postgres');
const pgPool = new Pool({
    host: dbConfig.host,
    port: Number(dbConfig.port),
    user: dbConfig.user,
    database: dbConfig.database,
    max: 10,
    idleTimeoutMillis: 30000,
    statement_timeout: 3000,
    connectionTimeoutMillis: 3000,
});


let client = await pgPool.connect();
console.log(`client-${id} connected`);
client.on('error', (err) => {
    console.error(`client error: ${err}`);
});
client.on('end', () => {
    console.log(`client end`);
});

const cursor = client.query(new Cursor('select 1'));
await new Promise(resolve=>setTimeout(resolve, 5000));

<path-to-my-project>\node_modules\pg\lib\client.js:561
        queryCallback(error)
        ^
source-map-support.js:722
TypeError: queryCallback is not a function
    at Timeout._onTimeout (<path-to-my-project>\node_modules\pg\lib\client.js:561:9)
    at listOnTimeout (node:internal/timers:569:17)
    at processTimers (node:internal/timers:512:7)
source-map-support.js:726
Process exited with code 1

source code that throws:

node-postgres/packages/pg/lib/client.js

Lines 551 to 562 in 26ace0a

	if (readTimeout) {
	queryCallback = query.callback
	readTimeoutTimer = setTimeout(() => {
	const error = new Error('Query read timeout')
	process.nextTick(() => {
	query.handleError(error, this.connection)
	})
	queryCallback(error)

[hwc0919]

The code may seem wired, because I'm trying to make my program robust by testing all cases that will throw, and finding auto recover methods.