eslint --fix does not work properly when used with prefer-arrow-callback

[pauloborges]

What version of eslint are you using?

4.14.0.

What version of prettier are you using?

1.9.2.

What version of eslint-plugin-prettier are you using?

2.4.0.

Please paste any applicable config files that you're using (e.g. .prettierrc or .eslintrc files)

.eslintrc.yaml:

extends:
  - plugin:prettier/recommended

parserOptions:
  ecmaVersion: 6

rules:
  prefer-arrow-callback: "error"

What source code are you linting?

function func(arg) {
  return Array.isArray(arg.param) && foo.bar.filter(function(baz) {
    return baz.code === 42;
  }).length > 0;
}

What did you expect to happen?

When applying eslint --fix I would expect it to generate valid code.

What actually happened?

It generates invalid code:

function func(arg) {
  return (
    Array.isArray(arg.param) &&
    foo.bar.filter((baz) => {
    return baz.code === 42;
  }).length > 0;
}

I managed to create this minimal reproducible environment, which can be found here.

When I run eslint --fix index.js, it generates invalid code. But if I remove the plugin from the ESLint configuration, run eslint --fix index.js and then run prettier --write index.js it will generate the expected output.

[pauloborges]

Whoops, I just saw #65 which is the same issue. I'll close this one.