False positive in prefer-rest-params when checking arguments.length #5990
Description
ESLint version: 2.8.0
What parser are you using?
"parserOptions": {
"ecmaVersion": 6,
"sourceType": "module",
"ecmaFeatures": {"jsx": true},
},
When linting this code:
function makeTree(rootPath, branches) {
console.assert(arguments.length === 2);
console.assert(_.isArray(rootPath));
console.assert(_.isArray(branches) && _.isArray(branches[0]));
return _.map(branches, branch => rootPath.concat(branch));
}
I get this warning:
Use the rest parameters instead of 'arguments' prefer-rest-params
I believe this to be a false positive. Imho just checking arguments.length should be an exception to this rule (possibly configurable).