Conflicting rules: comma-spacing & array-bracket-spacing

Tell us about your environment

• ESLint Version: 4.13.1
• Node Version: 6.12.2
• npm Version: 3.10.10

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

Please show your full configuration:

{
  "env": {
    "node": true,
    "es6": true
  },
  "extends": "eslint:recommended",
  "rules": {
    "indent": [
      "error",
      4,
      {
        "SwitchCase": 1
      }
    ],
    "brace-style": [
      "error",
      "1tbs"
    ],
    "linebreak-style": [
      "error",
      "unix"
    ],
    "quotes": [
      "error",
      "single"
    ],
    "semi": [
      "error",
      "always"
    ],
    "space-in-parens": [
      "error",
      "never"
    ],
    "comma-spacing": [
      "error",
      {
        "before": false,
        "after": true
      }
    ],
    "array-bracket-spacing": [
      "error",
      "never"
    ],
    "object-curly-spacing": [
      "error",
      "never"
    ],
    "no-unused-vars": [
      "error",
      {
        "args": "none"
      }
    ],
    "strict": [
      "error",
      "global"
    ],
    "array-bracket-newline": [
      "error",
      {
        "multiline": true
      }
    ],
    "implicit-arrow-linebreak": [
      "error",
      "beside"
    ]
  }
}

Configuration

"comma-spacing": ["error", {"before": false, "after": true}]
"array-bracket-spacing": ["error", "never"]

What did you do? Please include the actual source code causing the issue, as well as the command that you used to run ESLint.

let [, b,] = [1, 2, 3];

eslint .

What did you expect to happen? For the linting to succeed because it followed the comma-spacing rule but then I realized the conflict. If run with --fix, it is not fixed because of the conflicting rules.

What actually happened? Please include the actual, raw output from ESLint. array-bracket-spacing requires there to be no space before the close bracket in the destruction but comma-spacing requires there to be a space after the final comma in the destruction. Therefore, a conflict occurs.

~/conflict.js
  3:9  error  A space is required after ','           comma-spacing

[platinumazure]

I’m not sure if this would be a bug or enhancement request, but I think it would make sense for array-bracket-spacing to control here and for comma-spacing to focus on commas between items in a list only (rather than commas between the last list item and the closing token).

[michaelficarra]

You can just omit the trailing comma, no?