Abort does not work with bun

[abaudhuin]

What version of Hono are you using?

4.2.4

What runtime/platform is your app running on?

bun

What steps can reproduce the bug?

With the following example inspired by the doc, I cannot get an onAbort to work using Bun, when switching to Node it works normally. I am testing with postman to make the request, and closing it in the ui.
Am I doing something wrong or something is broken ?

import { Hono } from "hono";
import { streamSSE } from "hono/streaming";
// import { serve } from "@hono/node-server";

const hono = new Hono();

let id = 0;
hono.get("t", (c) => {
  return streamSSE(c, async (stream) => {
    setTimeout(() => {
      stream.close();
    }, 10000);
    stream.onAbort(() => {
      console.log("aborted");
    });
    while (true) {
      try {
        await stream.writeSSE({
          data: `It is ${new Date().toISOString()}`,
          event: "time-update",
          id: String(id++),
        });
        await stream.sleep(1000);
      } catch (e) {
        console.error(e);
        break;
      }
    }
  });
});

// serve(hono);
export default hono;

What is the expected behavior?

'aborted' should be logged with bun and node.

What do you see instead?

'aborted' is not logged with bun

Additional information

No response

[usualoma]

Hi @abaudhuin
Thank you for your report.

I'm considering a fix in #3042, but I'd like to investigate other runtimes and their behavior a bit more before merging.
You can use the #3042 branch if you need it now, which will work fine in the bun.

[abaudhuin]

Thank you very much !
I've postponed my work needing this for now. I will wait for the fix to be merged.
Do you have an idea of the time it will take for this to be released?

[usualoma]

@abaudhuin In #3042, I wrote a test and requested a review, so wait and see.

[abaudhuin]

Thank you very much !!