Version

v19.6.0

Platform

Darwin 22.2.0 Darwin Kernel Version 22.2.0: Fri Nov 11 02:03:51 PST 2022; root:xnu-8792.61.2~4/RELEASE_ARM64_T6000 arm64 arm Darwin

Subsystem

fetch

What steps will reproduce the bug?

async function main() {
  const controller = new AbortController();
  for (let i = 0; i < 15; i++) {
    try {
      await fetch('http://example.com', { signal: controller.signal });
    } catch (e) {}
  }
}

main();

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

Every time

What is the expected behavior?

No errors or warnings

What do you see instead?

(node:57538) MaxListenersExceededWarning: Possible EventTarget memory leak detected. 11 abort listeners added to [AbortSignal]. Use events.setMaxListeners() to increase limit

Additional information

It looks like Node's built-in fetch fails to properly clean up its abort listener when used with an AbortSignal.