The "fd" argument must be of type number. Received null - Erroring in recent Node versions 20 and 21

[SamTV12345]

Version

v21.2.0

Platform

Linux/MacOS/Windows - same error on all three platforms

Subsystem

No response

What steps will reproduce the bug?

1. git clone git@github.com:ether/ueberDB.git && git checkout fix/tests
2. Install Node: Node 20.3.0 works, the respective versions 20 and 21 were released in a time window of 5 days ago
3. npm i
4. Run the file test/lib/test.spec.ts
5. See the tests failing on recent Node versions

How often does it reproduce? Is there a required condition?

Always

What is the expected behavior? Why is that the expected behavior?

It should run without a problem.

What do you see instead?

TypeError: The "fd" argument must be of type number. Received null

Additional information

No response

[marco-ippolito]

Can you share a minimal reproducible example without 3rd party libraries and a stacktrace?

[SamTV12345]

Sure I'll create one in the next few hours. It was thrown in the dirty db implementation so it shouldn't be too hard to track that down.

[SamTV12345]

@marco-ippolito Here is the example. I just put it into a test so I can easily start it from webstorm

import {describe, it} from "vitest";
import {TMP_PATH} from "./config";
import fs, {createWriteStream} from "fs";

describe('test-node-failure',  () =>{

    it('should allow .on load to chain to constructor', async function () {
        let path = "test.txt"
        let _writeStream = createWriteStream(path, {
            encoding: 'utf-8',
            flags: 'a',
        });
            let _queue = new Map();
            let key = 'key';

            const cbs = _queue.get(key) || [];
            _queue.set(key, cbs);
        _writeStream.cork();
        for (const [key, _] of _queue) {
            _queue.delete(key);
            const data = `${JSON.stringify({key, val: "test"})}\n`;
            _writeStream.write(data, (err) => {
                console.log(err)
            });
        }
        _writeStream.uncork();
        });
});

[SamTV12345]

Stacktrace looks like this:

TypeError: The "fd" argument must be of type number. Received null
    at Object.write (node:fs:834:8)
    at WriteStream.writeAll (node:internal/fs/streams:418:13)
    at WriteStream._write (node:internal/fs/streams:477:12)
    at doWrite (node:internal/streams/writable:590:12)
    at clearBuffer (node:internal/streams/writable:773:7)
    at WriteStream.Writable.uncork (node:internal/streams/writable:523:7)
    at C:\Users\user\WebstormProjects\dirty_db\test\test-minimal.test.ts:25:22
    at file:///C:/Users/user/WebstormProjects/dirty_db/node_modules/@vitest/runner/dist/index.js:135:14
    at file:///C:/Users/user/WebstormProjects/dirty_db/node_modules/@vitest/runner/dist/index.js:58:26
    at runTest (file:///C:/Users/user/WebstormProjects/dirty_db/node_modules/@vitest/runner/dist/index.js:663:17)