Investigate flaky `async-hooks.test-improper-unwind`

Test

test/async-hooks/test-improper-unwind.js

Platform

AIX

Console output

---
duration_ms: 362.309
exitcode: 1
severity: fail
stack: |-
  node:assert:94
    throw new AssertionError(obj);
    ^

  AssertionError [ERR_ASSERTION]: Expected values to be strictly equal:

  null !== 1

      at ChildProcess.<anonymous> (/home/iojs/build/workspace/node-test-commit-aix/nodes/aix72-ppc64/test/async-hooks/test-improper-unwind.js:59:12)
      at ChildProcess.<anonymous> (/home/iojs/build/workspace/node-test-commit-aix/nodes/aix72-ppc64/test/common/index.js:437:15)
      at ChildProcess.emit (node:events:507:28)
      at maybeClose (node:internal/child_process:1101:16)
      at ChildProcess._handle.onexit (node:internal/child_process:305:5) {
    generatedMessage: true,
    code: 'ERR_ASSERTION',
    actual: null,
    expected: 1,
    operator: 'strictEqual'
  }

  Node.js v25.0.0-pre
...

Build links

Additional information

No response