Schema JSON validation fails with ESLint 4.2.0

Tell us about your environment

• ESLint Version: 4.2.0
• Node Version: 6.9.2
• npm Version: 3.10.2

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.

It seems that ESLint has upgraded its JSON validator for 4.2.0: eslint/eslint#8852

Note: It’s only a guess that the above change has caused the problems, but it’s not fully confirmed.

This is causing issues for a rule in eslint-plugin-react:. It seems that the following schema validation is causing problems: https://github.com/yannickcr/eslint-plugin-react/blob/master/lib/rules/jsx-curly-spacing.js#L34

The produced error:

can't resolve reference #/definitions/basicConfig from id #
can't resolve reference #/definitions/basicConfigOrBoolean from id #
Warning: [object Object]:
        Configuration for rule "react/jsx-curly-spacing" is invalid:
refVal[2] is not a function Use --force to continue.
 at validateRuleOptions (node_modules\eslint\lib\config\config-validator.js:112:15)
      at Object.keys.forEach.id (node_modules\eslint\lib\config\config-validator.js:152:9)
      at Array.forEach (native)
      at validateRules (node_modules\eslint\lib\config\config-validator.js:151:30)
      at Object.validate (node_modules\eslint\lib\config\config-validator.js:206:5)
      at runRuleForItem (node_modules\eslint\lib\testers\rule-tester.js:331:23)
      at testValidTemplate (node_modules\eslint\lib\testers\rule-tester.js:413:28)
      at Context.RuleTester.it (node_modules\eslint\lib\testers\rule-tester.js:546:25)

The issue can be reproduced by cloning the eslint-plugin-react repo and running npm run test.

What did you expect to happen?

No errors.

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

See above.

[epoberezkin]

I think it was a breaking change but released with a minor version for some reason.

@mysticatea Ajv is supposed to ignore missing $ref, will release a fix.

[jseminck]

I think this can be closed now, right?