4.1.0 -> 4.1.1 update breaks eslint

[ikr]

I'm not completely sure if the problem is with estraverse or eslint, but the fact is that eslint works just fine for us over estraverse 4.1.0, bur over estraverse 4.1.1 it does that:

> browser-app@4.1.0 lint /home/gitlab-runner/builds/be2d88b2/0/stc-b2b/browser-app
> eslint ./src ./index.js ./tests


/home/gitlab-runner/builds/be2d88b2/0/stc-b2b/browser-app/node_modules/estraverse/estraverse.js:411
                current = candidates.length;
                                    ^
TypeError: Cannot read property 'length' of undefined
    at Controller.traverse (/home/gitlab-runner/builds/be2d88b2/0/stc-b2b/browser-app/node_modules/estraverse/estraverse.js:411:37)
    at EventEmitter.module.exports.api.verify (/home/gitlab-runner/builds/be2d88b2/0/stc-b2b/browser-app/node_modules/eslint/lib/eslint.js:779:24)
    at processText (/home/gitlab-runner/builds/be2d88b2/0/stc-b2b/browser-app/node_modules/eslint/lib/cli-engine.js:221:27)
    at processFile (/home/gitlab-runner/builds/be2d88b2/0/stc-b2b/browser-app/node_modules/eslint/lib/cli-engine.js:258:18)
    at executeOnFile (/home/gitlab-runner/builds/be2d88b2/0/stc-b2b/browser-app/node_modules/eslint/lib/cli-engine.js:604:23)
    at Array.forEach (native)
    at /home/gitlab-runner/builds/be2d88b2/0/stc-b2b/browser-app/node_modules/eslint/lib/cli-engine.js:630:49
    at Array.forEach (native)
    at CLIEngine.executeOnFiles (/home/gitlab-runner/builds/be2d88b2/0/stc-b2b/browser-app/node_modules/eslint/lib/cli-engine.js:626:18)
    at Object.cli.execute (/home/gitlab-runner/builds/be2d88b2/0/stc-b2b/browser-app/node_modules/eslint/lib/cli.js:159:95)

[michaelficarra]

You didn't really give me much to go on. You can check out the diff here: 4.1.0...4.1.1.

Closing until a repro is posted.

[ikr]

True, sorry. Seems it's somehow related to npm. Clean install with npm 2 results in a fully functional eslint + estraverse, but clean install with npm 3 fails as noted above.

[ikr]

Alright, so if someone else bothers you again about that, you can relate them to npm/npm#9663

Have a nice day!