linter.verifyAndFix incorrectly requires third argument

[not-an-aardvark]

Tell us about your environment

• ESLint Version: master
• Node Version: 8.1.2
• npm Version: 5.0.3

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

N/A

Please show your full configuration:

N/A

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

const eslint = require("eslint");
const linter = new eslint.Linter();

linter.verifyAndFix("foo", { rules: { semi: "error" } })

What did you expect to happen?

I expected an object containing fix info to be returned:

{ "fixed": true, "messages": [], "output": "foo;" }

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

An error was thrown:

TypeError: Cannot read property 'filename' of undefined
    at Linter.verifyAndFix (/path/to/eslint/lib/linter.js:1221:46)
    at repl:1:8
    at ContextifyScript.Script.runInThisContext (vm.js:44:33)
    at REPLServer.defaultEval (repl.js:239:29)
    at bound (domain.js:301:14)
    at REPLServer.runBound [as eval] (domain.js:314:12)
    at REPLServer.onLine (repl.js:433:10)
    at emitOne (events.js:120:20)
    at REPLServer.emit (events.js:210:7)
    at REPLServer.Interface._onLine (readline.js:278:10)

It seems like the third "options" argument for linter.verifyAndFix is accidentally required. It's optional for linter.verify, so it should also be optional for linter.verifyAndFix.

As a workaround, one can use:

linter.verifyAndFix(text, config, {});