no-extra-parens have false positive about for-of statement

[mysticatea]

Tell us about your environment

• ESLint Version: v4.13.1
• Node Version: -
• npm Version: -

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

• default

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

/*eslint no-extra-parens: [error, all] */

for (a in (b, c));
for (a of (b, c));

Online demo

What did you expect to happen?

ESLint reports an error:

• 3:11 - Gratuitous parentheses around expression. (no-extra-parens)

Because for (a of b, c); is syntax error. (related to acornjs/acorn#642)

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

ESLint reports 2 errors:

• 3:11 - Gratuitous parentheses around expression. (no-extra-parens)
• 4:11 - Gratuitous parentheses around expression. (no-extra-parens)

[erindepew]

@mysticatea if this issue hasn't already been claimed I'd be interested in fixing this!

[mysticatea]

@erindepew Please! I have not started yet.