comma-style: Autofix can lead to parse error when line comment on preceding line and block comment on same line as solo comma

[platinumazure]

Tell us about your environment

• ESLint Version: master
• Node Version: 8.11.3
• npm Version: 5.6.0

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

Default

Please show your full configuration:

(See ESLint command)

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

[
    ...one /* block comment 1 */ // line comment
    , /* block comment 2
    foo bar */
];

node bin/eslint ./file.js --no-eslintrc --rule "comma-style: error" --parser-options "ecmaVersion: 2015" --fix

What did you expect to happen?

Autofix to work with no syntax error afterwards; or no fix applied

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

First pass autofix results in the following:

[

    ...one, /* block comment 1 */ // line comment /* block comment 2
    foo bar */
];

The line comment results in the opening of block comment 2 not taking effect, so the foo bar on the next line is not commented. This results in a parser error since foo bar is not a valid expression.

---

This example is a simplified version of a test case generated by the ESLint fuzz tool.

[serbanghita]

Hi, I started working on this.
I'm looking into both variants:

• Autofix to work with no syntax error afterwards
• no fix applied

[jouncealimb]

Hi @serbanghita I see you started working on this. Are you still working on this one?

[serbanghita]

@jouncealimb no, I failed to find time to address it :(