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Error with npm.... error cb() never called!

What I Wanted to Do

I wanted to install Angular with NPM

What Happened Instead

Unhandled rejection Error: EISDIR: illegal operation on a directory, open ‘/Users/samstrat/.npm/_cacache/index-v5/0c/bb’

npm ERR! cb() never called!

npm ERR! This is an error with npm itself. Please report this error at:
npm ERR!

npm ERR! A complete log of this run can be found in:

Reproduction Steps

I just ran this command:

sudo npm install -g @angular/cli

The error came up right away.


Platform Info

$ npm --versions
<!-- paste output here -->
$ node -p process.platform
<!-- paste output here -->

There is an open issue with installing global packages using sudo leaving behind files with the wrong ownership.

The short version is run this to fix the ownership, then try your install again:

sudo chown -R $(whoami) ~/.npm

The long version and canonical bug is: Global installs (sudo npm i -g) fail on Mac after 6.5 upgrade. Works fine after 6.4.1 downgrade.