cb() never called! Can't update NPM or install new

[darcyclarke]

  Original bug ticket: [https://npm.community/t/9164](https://npm.community/t/9164)
  Originally filed: 2019-07-29T19:05:16.541Z

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From original issue: https://npm.community/t/9164
Debug log: n/a
Action triggered: sudo npm install -g npm

Platform info: (incomplete)

$ npm --versions
6.9.0
$ node -p process.platform
darwin

Additional information:

• reference to a blog post which indicates solving the problem with an update of npm and clearing the cache.

[mikemimik]

Duplicate issue; aggregating into #417.