AIX: parallel/test-cluster-inspector-debug-brk intermittent failures  #11830

not ok 145 parallel/test-cluster-inspector-debug-brk
  ---
  duration_ms: 0.946
  severity: fail
  stack: |-
    Debugger listening on port 12346.
    Warning: This is an experimental feature and could change at any time.
    To start debugging, open the following URL in Chrome:
        chrome-devtools://devtools/bundled/inspector.html?experiments=true&v8only=true&ws=127.0.0.1:12346/96c43f40-8e51-4b52-93f9-18337191abd6
    Debugger listening on port 12347.
    Warning: This is an experimental feature and could change at any time.
    To start debugging, open the following URL in Chrome:
        chrome-devtools://devtools/bundled/inspector.html?experiments=true&v8only=true&ws=127.0.0.1:12347/bcacbed6-1c15-4913-ab4f-2e5acb7d5a1a
    Debugger listening on port 12348.
    Warning: This is an experimental feature and could change at any time.
    To start debugging, open the following URL in Chrome:
        chrome-devtools://devtools/bundled/inspector.html?experiments=true&v8only=true&ws=127.0.0.1:12348/588c12b9-cc5a-48cf-a638-213a320a7fe7
    Debugger listening on port 12349.
    Warning: This is an experimental feature and could change at any time.
    To start debugging, open the following URL in Chrome:
        chrome-devtools://devtools/bundled/inspector.html?experiments=true&v8only=true&ws=127.0.0.1:12349/18ce9a5a-0ffb-4bfb-9587-b313cc4e008c
    Debugger listening on port 12350.
    Warning: This is an experimental feature and could change at any time.
    To start debugging, open the following URL in Chrome:
        chrome-devtools://devtools/bundled/inspector.html?experiments=true&v8only=true&ws=127.0.0.1:12350/06ed0f67-96e8-4f61-b388-fd77d3d7fafc
    
    assert.js:81
      throw new assert.AssertionError({
      ^
    AssertionError: 0 === null
        at Worker.worker.on.common.mustCall (/home/iojs/build/workspace/node-test-commit-aix/nodes/aix61-ppc64/test/parallel/test-cluster-inspector-debug-brk.js:19:14)
        at Worker.<anonymous> (/home/iojs/build/workspace/node-test-commit-aix/nodes/aix61-ppc64/test/common.js:473:15)
        at emitTwo (events.js:127:13)
        at Worker.emit (events.js:215:7)
        at ChildProcess.worker.process.once (internal/cluster/master.js:188:12)
        at Object.onceWrapper (events.js:314:19)
        at emitTwo (events.js:127:13)
        at ChildProcess.emit (events.js:215:7)
        at Process.ChildProcess._handle.onexit (internal/child_process.js:208:12)
  ...