Environment

Node version: v18.10.0
npm version: v8.19.2
Local ESLint version: v8.24.0 (Currently used)
Global ESLint version: Not found
Operating System: linux 5.19.0-2-amd64

What parser are you using?

Default (Espree)

What did you do?

use comma-dangle with new flat config with languageOptions.ecmaVersion = 'latest' and comma-dangle configured as ['error', 'always-multiline']

What did you expect to happen?

comma-dangle would impart 'error' for 'functions'

What actually happened?

comma-dangle does not impart 'error' for 'functions', due to failing ecmaVersion check

Participation

• I am willing to submit a pull request for this issue.

Additional comments

other rules suffer similarly, expecting ecmaVersion to be a Number