async parsing rules are broken

Tell us about your environment

• ESLint Version: 3.6.0
• Node Version: 6.6
• npm Version: whatever it comes with

What parser (default, Babel-ESLint, etc.) are you using? default

Please show your full configuration: echo 'var foo = { async: 3 };' | eslint --no-eslintrc --stdin --parser-options='ecmaVersion:2017'

What did you do? Please include the actual source code causing the issue. echo 'var foo = { async: 3 };' | eslint --no-eslintrc --stdin --parser-options='ecmaVersion:2017'

What did you expect to happen? No error.

What actually happened? Please include the actual, raw output from ESLint.

<text>
  1:18  error  Parsing error: Unexpected token :

✖ 1 problem (1 error, 0 warnings)

async is not a keyword, so it should be allowed anywhere.

[mysticatea]

I sent a PR to fix.

[platinumazure]

Acorn parses this fine and espree reproduces the issue when used directly, so I think it’s definitely an espree issue. Unfortunately, that’s all I have time for at this point, so someone else feel free to jump on it.

@mysticatea I reproduced on espree master but had no trouble when using espree’s acorn dependency (and I just cloned espree and npm install’d five minutes ago), so I’m pretty sure there’s an espree problem. (EDIT: And I just confirmed that espree pulled in acorn 4.0.3. So there’s something wrong with espree for sure)