Parsing error: Unexpected token => when using eslint --init on post-ES2015 files

Tell us about your environment

• ESLint Version: 4.12.1
• Node Version: 9.5.0
• npm Version: 5.6.0

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

Please show your full configuration: N/A

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

(async () => {
});

eslint --init

Followed by answering prompts as follows:

• File? fileName.js
• Format? YAML
• ES6 features? Yes
• ES6 modules? Yes
• Environment? Node
• JSX? No

What did you expect to happen?

.eslint.yaml generated

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

(~/tmp/example.js:1:11) Parsing error: Unexpected token =>
Error: (~tmp/example.js:1:11) Parsing error: Unexpected token =>
    at getSourceCodeOfFile (/usr/local/lib/node_modules/eslint/lib/util/source-code-util.js:38:15)
    at filenames.forEach.filename (/usr/local/lib/node_modules/eslint/lib/util/source-code-util.js:94:28)
    at Array.forEach (<anonymous>)
    at getSourceCodeOfFiles (/usr/local/lib/node_modules/eslint/lib/util/source-code-util.js:93:15)
    at configureRules (/usr/local/lib/node_modules/eslint/lib/config/config-initializer.js:165:23)
    at processAnswers (/usr/local/lib/node_modules/eslint/lib/config/config-initializer.js:288:18)
    at inquirer.prompt.then.secondAnswers (/usr/local/lib/node_modules/eslint/lib/config/config-initializer.js:536:32)
    at <anonymous>
Determining Config: 0% [------------------------------] 0.0s elapsed, eta 0.0s

[not-an-aardvark]

This is happening because we only ask whether the user is using ES6, and we don’t supply an option for later ES versions. When the question was added, ES2015 was the latest version.

Maybe we should add a list of ES versions to choose from, rather than just asking about ES6.

[not-an-aardvark]

In today’s TSC meeting, the TSC accepted this issue.