AbortSignal.any memory leak when circular dependencies

Version

23.10.0

Platform

6.8.0-55-generic #57-Ubuntu SMP PREEMPT_DYNAMIC Wed Feb 12 23:42:21 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux

Subsystem

No response

What steps will reproduce the bug?

class Test {
  private abortController = new AbortController()

  public test(cb: (abortSignal: AbortSignal) => void, abortSignal: AbortSignal) {
    const signal = AbortSignal.any([abortSignal, this.abortController.signal])

    cb(signal)
  }
}

const registry = new FinalizationRegistry((heldValue) => {
  console.log(`${heldValue} has been collected`)
})

;(() => {
  const test = new Test()
  registry.register(test, 'test')

  const abortController = new AbortController()

  test.test((abortSignal) => {
    abortSignal.addEventListener('abort', () => {
      console.log(test)
    })
  }, abortController.signal)
})()

global.gc?.()

setTimeout(() => {
  console.log('the end')
}, 2000)

run with node --expose-gc test.ts

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

Every time

What is the expected behavior? Why is that the expected behavior?

the output should be

test has been collected
the end

because the test object is not referenced anymore

What do you see instead?

output:

the end

the test object is not garbage collected

Additional information

The issues seems to be caused by the cyclic dependency: test object => abortController field => abortSignal => AbortSignal.any result => cb function => test object

AbortSignal.any seems to prevent node from garbage collecting them all at once

Run the supplied reproduction with node --expose-gc and inspect the AbortSignal.any, AbortController, and FinalizationRegistry interaction described in the issue. Done means the test object is collected and the output includes both “test has been collected” and “the end”.