eol-last with whitespace breaks everything

Tell us about your environment

• ESLint Version: 5.11.1
• Node Version: 10.11.0
• npm Version: 6.9.0

What parser (default, Babel-ESLint, etc.) are you using? default with VSCode plugin Please show your full configuration:

Configuration

{
  "env": {
    "es6": true,
    "node": true,
    "mocha": true
  },
  "extends": [
    "eslint-config-standard",
    "react-app"
  ],
  "globals": {
    "integrations": true
  },
  "ecmaFeatures": {
    "jsx": true,
    "node": true
  },
  "plugins": [
    "react"
  ],
  "rules": {
    "no-use-before-define": 2,
    "symbol-description": 0
  }
}

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

const init = () => {
   console.log('dsadsa')
  const dsada = 1
}
 

What did you expect to happen? I expected it to show me all linter errors.

What actually happened? Please include the actual, raw output from ESLint. It only shows some unrelated linter errors. After removing whitespace from last line it shows all errors

Are you willing to submit a pull request to fix this bug? No

[Sahtair]

@platinumazure here is the stack trace from the output. As you can see the provided demo is only 5 lines but it keeps requesting line 6 when a whitespace is on line 5. It is a real nightmare trying to figure out why our linter is not working as intended with this issue.

[Error - 3:59:18 PM] ESLint stack trace:
[Error - 3:59:18 PM] RangeError: Line number out of range (line 6 requested, but only 5 lines present).
    at SourceCode.getIndexFromLoc (/Users/jurest/Projects/smart-stack/node_modules/eslint/lib/util/source-code.js:389:19)
    at Object.fix (/Users/jurest/Projects/smart-stack/node_modules/eslint/lib/rules/no-multiple-empty-lines.js:116:52)
    at RuleContext.report (/Users/jurest/Projects/smart-stack/node_modules/eslint/lib/rule-context.js:127:34)
    at Program:exit.allLines.reduce.concat.reduce (/Users/jurest/Projects/smart-stack/node_modules/eslint/lib/rules/no-multiple-empty-lines.js:108:37)
    at Array.reduce (<anonymous>)
    at EventEmitter.Program:exit (/Users/jurest/Projects/smart-stack/node_modules/eslint/lib/rules/no-multiple-empty-lines.js:93:22)
    at EventEmitter.emit (events.js:187:15)
    at NodeEventGenerator.applySelector (/Users/jurest/Projects/smart-stack/node_modules/eslint/lib/util/node-event-generator.js:265:26)
    at NodeEventGenerator.applySelectors (/Users/jurest/Projects/smart-stack/node_modules/eslint/lib/util/node-event-generator.js:294:22)
    at NodeEventGenerator.leaveNode (/Users/jurest/Projects/smart-stack/node_modules/eslint/lib/util/node-event-generator.js:317:14)

[platinumazure]

I was hoping I or someone else would have a chance to try to recreate the bug before the issue got auto-closed (again). I apologize for not having had a chance to do it myself.

@eslint/eslint-team Could someone please try recreating this bug with the configuration and source code from the original post?