I'm actually just about done fixing this, the problem was our node:events.on was out of spec and didn't return an async iterator, which readline's async iterator uses internally. Once I finish testing that, this issue should be resolved too

Related: #2187

when fix

This works on bun 1.0.25:

import { createReadStream } from "node:fs";
import { createInterface } from "node:readline/promises";

const stream = createReadStream('file.csv');
const rl = createInterface({ input: stream });

for await (const line of rl) {
  console.log(line);
}

Edit: Nope. Only reads 3 lines.

It now appears to only read the first line.

It now appears to only read the first line.

Confirmed in 1.0.26

This was fixed in Bun v1.1.0