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Cannot read property 'range' of null error with one-var #10937

jkrup opened this issue Oct 8, 2018 · 1 comment


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commented Oct 8, 2018

Tell us about your environment

  • ESLint Version: master
  • Node Version: 8 / 10
  • npm Version: 5

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

Please show your full configuration:

  module.exports = {
    "parserOptions": {
    "ecmaVersion": 6,
    "sourceType": "module",
    "ecmaFeatures": {
      "jsx": true
  "rules": {
    'one-var': ['error', 'never'],

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

var a = 1, b = 2
eslint file.js

What did you expect to happen?

var a = 1; var b = 2

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

TypeError: Cannot read property 'range' of null
    at SourceCode.getTokenAfter (/Users/justink/eslintbugtest/node_modules/eslint/lib/token-store/index.js:320:18)
    at (/Users/justink/eslintbugtest/node_modules/eslint/lib/rules/one-var.js:322:47)
    at (<anonymous>)
    at Object.fixer [as fix] (/Users/justink/eslintbugtest/node_modules/eslint/lib/rules/one-var.js:315:54)
    at normalizeFixes (/Users/justink/eslintbugtest/node_modules/eslint/lib/report-translator.js:176:28)
    at args (/Users/justink/eslintbugtest/node_modules/eslint/lib/report-translator.js:278:18)
    at (/Users/justink/eslintbugtest/node_modules/eslint/lib/linter.js:830:41)
    at checkVariableDeclaration (/Users/justink/eslintbugtest/node_modules/eslint/lib/rules/one-var.js:480:33)
    at listeners.(anonymous function).forEach.listener (/Users/justink/eslintbugtest/node_modules/eslint/lib/util/safe-emitter.js:45:58)
    at Array.forEach (<anonymous>)

Additional Details:
This only happens if the last statement in the file is a var X, Y, ... statement (and does not terminate with a ;)

@eslint eslint bot added the triage label Oct 8, 2018

@not-an-aardvark not-an-aardvark added bug rule accepted and removed triage labels Oct 8, 2018


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commented Oct 8, 2018

Thanks for the report, I can reproduce this issue.

jkrup added a commit to jkrup/eslint that referenced this issue Oct 8, 2018

@btmills btmills closed this in 543edfa Oct 12, 2018

btmills added a commit that referenced this issue Oct 12, 2018

@eslint eslint bot locked and limited conversation to collaborators Apr 11, 2019

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