Process is not terminated automatically

What version of Bun is running?

1.1.27

What platform is your computer?

Darwin 23.6.0 arm64 arm

What steps can reproduce the bug?

I run a small script to read values from Firebase using Bun. When the value is read I expect the process to be terminated but instead - it hangs without any errors or any further status updates. I need manually to Ctrl + C the running process to get out of it. The logic of reading the values are completed correctly, so no issues on that side - just once my script has run, I expect it to exit the process.

Initially reported in Discord here.

Here is a quick reproduction steps.

Create a file main.ts with following content


import firebase from 'firebase-admin';
import { applicationDefault } from 'firebase-admin/app';
// Set to your Firebase URL
const FIREBASE_URL = process.env.FIREBASE_URL;

export const firebaseApp = firebase.initializeApp({ // Use default gcloud currently set authentication // Probs irrelevant to the actual Bun issue // Just make sure you can authenticate to a Firebase credential: applicationDefault(), databaseURL: FIREBASE_URL, });

// Set to whatever path you need to access const TARGET_FIREBASE_PATH = 'users/1';

const run = async () => { const value = await firebaseApp .database() .ref(TARGET_FIREBASE_PATH) // Might be the issue somewhere here, how this once is working .once('value');

const val = value.val(); if (val === null) { console.error('No value found. Exiting...'); process.exit(0); // This is the only way to exit the process }

console.log(val); // Process is not exiting here, terminal just hangs around };

await run();



### What is the expected behavior?

Once the script has run, I'd expect it to exit by itself ?

### What do you see instead?

_No response_

### Additional information

_No response_

oven-sh / bun