eslint: Escape characters are handled incorrectly in inline config comments

Tell us about your environment

• ESLint Version: v4.7.2
• Node Version: v8.5.0
• npm Version: Yarn v1.0.2

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

Please show your full configuration:

rules:
    id-match: [2, "^(([^$\\W]|\\$[a-f\\d]{2})+|[$_]\\w*|[^\\W\\d]\\w*|[A-Z]([A-Z_]*[A-Z])?)$", {
        properties: true
    }]

What did you do? Please include the actual source code causing the issue.

/* eslint id-match: [2, "^(([^$\\W]|\\$[a-f\\d]{2})+|[$_]\\w*|[^\\W\\d]\\w*|[A-Z]([A-Z_]*[A-Z])?)$", {properties: true}] */

function is$2dvoid(value) {
    return value == null
}

What did you expect to happen? It to pass (as it does without the comment)

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

/path/to/file.js
  3:10  error  Identifier 'is$2dvoid' does not match the pattern '^(([^$\\W]|\\$[a-f\\d]{2})+|[$_]\\w*|[^\\W\\d]\\w*|[A-Z]([A-Z_]*[A-Z])?)$'  id-match

✖ 1 problem (1 error, 0 warnings)