Node process exits with exit code 13 without outputing any error

// test.mjs
import { Readable, Writable } from 'stream';
import FfmpegCommand from 'fluent-ffmpeg';

process.on('exit', console.log); // outputs 0, but actual exit code is 13

await new Promise((resolve, reject) => FfmpegCommand()
	.input(Readable.from(Buffer.from(new ArrayBuffer(1000))))
	.inputFormat('f32le')
	.audioChannels(1)
	.audioFrequency(44100)
	.format('wav')
	.pipe(new Writable({ write: chunk => console.log(chunk.length) }))
	.on('end', resolve)
	.on('error', reject)
);

console.log('done'); // never reached

$ node test.mjs && echo good || echo $?
78
0
13