eslint: Bug report: Comma dangle always throw error

Tell us about your environment

• ESLint Version: v3.12.2
• Node Version: v6.9.1
• npm Version: 4.0.5

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

default

Please show your full configuration:

{
  "globals": {},
  "env": {},
  "rules": {
    "comma-dangle": [
      "error",
      {
        "arrays": "always-multiline",
        "objects": "always-multiline",
        "imports": "always-multiline",
        "exports": "always-multiline",
        "functions": "always-multiline"
      }
    ]
  },
  "parserOptions": {}
}

What did you do? Please include the actual source code causing the issue.

console.log(
	'a'
);

What did you expect to happen?

$> eslint a.js
# No error

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

mondwan@mondwan-All-Series:~/Documents/codeTest/babelEslint$ eslint --print-config .
{
  "globals": {},
  "env": {},
  "rules": {
    "comma-dangle": [
      "error",
      {
        "arrays": "always-multiline",
        "objects": "always-multiline",
        "imports": "always-multiline",
        "exports": "always-multiline",
        "functions": "always-multiline"
      }
    ]
  },
  "parserOptions": {}
}
mondwan@mondwan-All-Series:~/Documents/codeTest/babelEslint$ cat a.js 
console.log(
	'a'
);
mondwan@mondwan-All-Series:~/Documents/codeTest/babelEslint$ eslint a.js 

/home/mondwan/Documents/codeTest/babelEslint/a.js
  2:5  error  Missing trailing comma  comma-dangle

✖ 1 problem (1 error, 0 warnings)