no-undef rule can not work in latest eslint version

What version are you using? 2.4.0 What did you do? run eslint with recommand rule. What happened? Can not check the no-undef error. What did you expect to happen? I have install the eslint 1.10.3 in another PC, the no-undef error will throw. But in latest eslint, this error has been ignored. I expect this error should be checked in latest version.

the test javascript content is this:

var arr = [0, 1, 2, 3, 4];
length = arr.length;

the config file is this:

{
  "env": {
    "browser": true,
    "node": true
  },
  "settings": {
  },
  "extends": "eslint:recommended",
}

check result is different between eslint@2.11.1 and eslint@1.10.3

[mysticatea]

@yinhaibo01 #5358 is still opened. It would be solved in the next version (maybe 2.13.0), I hope. 😉

[yinhaibo01]

Thank you for your reply, I will update the latest version.