AIX: sequential/test-fs-readfile-tostring-fail failing consistently

[mhdawson]

• Version: master
• Platform: AIX
• Subsystem: fs

https://ci.nodejs.org/job/node-test-commit-aix/9502/nodes=aix61-ppc64/console

not ok 1957 sequential/test-fs-readfile-tostring-fail
  ---
  duration_ms: 79.20
  severity: fail
  stack: |-
    /home/iojs/build/workspace/node-test-commit-aix/nodes/aix61-ppc64/test/sequential/test-fs-readfile-tostring-fail.js:57
      throw err;
      ^
    
    AssertionError [ERR_ASSERTION]: false == true
        at /home/iojs/build/workspace/node-test-commit-aix/nodes/aix61-ppc64/test/sequential/test-fs-readfile-tostring-fail.js:31:12
        at /home/iojs/build/workspace/node-test-commit-aix/nodes/aix61-ppc64/test/common/index.js:520:15
        at FSReqWrap.readFileAfterClose [as oncomplete] (fs.js:528:3)
  ...

[mhdawson]

First thing is to check if this is the failure that was related to the 6.2 upgrade.

[mhdawson]

Yes, this is the PR to fix: https://github.com/nodejs/node/pull/16273/files