ESLint: Cannot read property 'loc' of undefined.

[deviprsd]

This bug still exists, #441

import { CalendarioOptions, DEFAULTS } from './lib/options'
import { TimeZoneError } from './lib/errors'
import { CalendarioEvents, processEvents, ProcessedCalendarioEvents } from './lib/events'
import { Settings, Info, Zone, DateTime } from 'luxon';

export default function calendario (events?: CalendarioEvents, options: CalendarioOptions = {}, today?: Date): void {
    let zone: Zone

    Settings.throwOnInvalid = true

    options = {...DEFAULTS, ...options}
    const resolvedOpts = DateTime.fromObject({ locale: options.locale, numberingSystem: options.numberingSystem }).resolvedLocaleOpts()
    
    const // <- error happened here
    if(!(zone = Info.normalizeZone(options.timeZone)).isValid) {
        throw new TimeZoneError(`Invalid timezone ${options.timeZone}`)
    }
    
    Settings.defaultZoneName = zone.name
    Settings.defaultLocale = resolvedOpts.locale
    Settings.defaultNumberingSystem = resolvedOpts.numberingSystem
    Settings.defaultOutputCalendar = 'gregory'

    const _today: DateTime = today ? DateTime.fromJSDate(today) : DateTime.local()
    const _events: ProcessedCalendarioEvents = processEvents({...events}, options)
}

export { INFO } from './lib/options'

Code I have been working on, was restructing and changing a let to const

2019-08-02T08:32:43.801Z eslint:cli CLI args: [ './src/index.ts', '--debug' ]
2019-08-02T08:32:43.804Z eslint:cli Running on files
2019-08-02T08:32:43.807Z eslint:ignored-paths baseDir = "/home/deviprsd/Projects/CalendarioFX/Calendario"
2019-08-02T08:32:43.808Z eslint:ignored-paths addPatternRelativeToCwd:
  original = "/node_modules/*"
  cooked   = "/node_modules/*"
2019-08-02T08:32:43.808Z eslint:ignored-paths addPatternRelativeToCwd:
  original = "/bower_components/*"
  cooked   = "/bower_components/*"
2019-08-02T08:32:43.808Z eslint:ignored-paths addPatternRelativeToCwd:
  original = ".*"
  cooked   = ".*"
2019-08-02T08:32:43.808Z eslint:ignored-paths addPatternRelativeToCwd:
  original = "!../"
  cooked   = "!../"
2019-08-02T08:32:43.808Z eslint:ignored-paths Looking for ignore file in /home/deviprsd/Projects/CalendarioFX/Calendario
2019-08-02T08:32:43.809Z eslint:ignored-paths Loaded ignore file /home/deviprsd/Projects/CalendarioFX/Calendario/.eslintignore
2019-08-02T08:32:43.809Z eslint:ignored-paths Adding /home/deviprsd/Projects/CalendarioFX/Calendario/.eslintignore
2019-08-02T08:32:43.810Z eslint:ignored-paths addPatternRelativeToIgnoreFile:
  original = "/index.*js"
  cooked   = "/index.*js"
2019-08-02T08:32:43.810Z eslint:ignored-paths addPatternRelativeToIgnoreFile:
  original = "/index.*js"
  cooked   = "/index.*js"
2019-08-02T08:32:43.810Z eslint:ignored-paths baseDir = "/home/deviprsd/Projects/CalendarioFX/Calendario"
2019-08-02T08:32:43.810Z eslint:ignored-paths addPatternRelativeToCwd:
  original = "/node_modules/*"
  cooked   = "/node_modules/*"
2019-08-02T08:32:43.810Z eslint:ignored-paths addPatternRelativeToCwd:
  original = "/bower_components/*"
  cooked   = "/bower_components/*"
2019-08-02T08:32:43.811Z eslint:ignored-paths Looking for ignore file in /home/deviprsd/Projects/CalendarioFX/Calendario
2019-08-02T08:32:43.811Z eslint:ignored-paths Loaded ignore file /home/deviprsd/Projects/CalendarioFX/Calendario/.eslintignore
2019-08-02T08:32:43.811Z eslint:ignored-paths Adding /home/deviprsd/Projects/CalendarioFX/Calendario/.eslintignore
2019-08-02T08:32:43.811Z eslint:ignored-paths addPatternRelativeToIgnoreFile:
  original = "/index.*js"
  cooked   = "/index.*js"
2019-08-02T08:32:43.811Z eslint:ignored-paths addPatternRelativeToIgnoreFile:
  original = "/index.*js"
  cooked   = "/index.*js"
2019-08-02T08:32:43.812Z eslint:file-enumerator Start to iterate files: [ './src/index.ts' ]
2019-08-02T08:32:43.813Z eslint:file-enumerator File: /home/deviprsd/Projects/CalendarioFX/Calendario/src/index.ts
2019-08-02T08:32:43.813Z eslint:cascading-config-array-factory Load config files for /home/deviprsd/Projects/CalendarioFX/Calendario/src.
2019-08-02T08:32:43.813Z eslint:cascading-config-array-factory No cache found: /home/deviprsd/Projects/CalendarioFX/Calendario/src.
2019-08-02T08:32:43.813Z eslint:config-array-factory Config file not found on /home/deviprsd/Projects/CalendarioFX/Calendario/src
2019-08-02T08:32:43.813Z eslint:cascading-config-array-factory No cache found: /home/deviprsd/Projects/CalendarioFX/Calendario.
2019-08-02T08:32:43.814Z eslint:config-array-factory Loading JS config file: /home/deviprsd/Projects/CalendarioFX/Calendario/.eslintrc.js
2019-08-02T08:32:43.814Z eslint:config-array-factory Config file found: /home/deviprsd/Projects/CalendarioFX/Calendario/.eslintrc.js
2019-08-02T08:32:43.827Z eslint:config-array-factory Loading {extends:"eslint:recommended"} relative to /home/deviprsd/Projects/CalendarioFX/Calendario/.eslintrc.js
2019-08-02T08:32:43.827Z eslint:config-array-factory Loading JS config file: /usr/lib/node_modules/eslint/conf/eslint-recommended.js
2019-08-02T08:32:43.827Z eslint:config-array-factory Loading {extends:"plugin:@typescript-eslint/eslint-recommended"} relative to /home/deviprsd/Projects/CalendarioFX/Calendario/.eslintrc.js
2019-08-02T08:32:43.828Z eslint:config-array-factory Loading plugin "@typescript-eslint" from /home/deviprsd/Projects/CalendarioFX/Calendario/.eslintrc.js
2019-08-02T08:32:43.829Z eslint:config-array-factory Loaded: @typescript-eslint/eslint-plugin@1.13.0 (/home/deviprsd/Projects/CalendarioFX/Calendario/node_modules/@typescript-eslint/eslint-plugin/dist/index.js)
2019-08-02T08:32:44.075Z eslint:config-array-factory Loading {extends:"plugin:@typescript-eslint/recommended"} relative to /home/deviprsd/Projects/CalendarioFX/Calendario/.eslintrc.js
2019-08-02T08:32:44.076Z eslint:config-array-factory Loading plugin "@typescript-eslint" from /home/deviprsd/Projects/CalendarioFX/Calendario/.eslintrc.js
2019-08-02T08:32:44.076Z eslint:config-array-factory Loaded: @typescript-eslint/eslint-plugin@1.13.0 (/home/deviprsd/Projects/CalendarioFX/Calendario/node_modules/@typescript-eslint/eslint-plugin/dist/index.js)
2019-08-02T08:32:44.076Z eslint:config-array-factory Loading {extends:"./configs/base.json"} relative to /home/deviprsd/Projects/CalendarioFX/Calendario/node_modules/@typescript-eslint/eslint-plugin/dist/index.js
2019-08-02T08:32:44.077Z eslint:config-array-factory package.json was not found: Cannot find module './configs/base.json/package.json'
Require stack:
- /home/deviprsd/Projects/CalendarioFX/Calendario/node_modules/@typescript-eslint/eslint-plugin/dist/index.js
2019-08-02T08:32:44.077Z eslint:config-array-factory Loaded: ./configs/base.json (/home/deviprsd/Projects/CalendarioFX/Calendario/node_modules/@typescript-eslint/eslint-plugin/dist/configs/base.json)
2019-08-02T08:32:44.077Z eslint:config-array-factory Loading JSON config file: /home/deviprsd/Projects/CalendarioFX/Calendario/node_modules/@typescript-eslint/eslint-plugin/dist/configs/base.json
2019-08-02T08:32:44.078Z eslint:config-array-factory Loading parser "@typescript-eslint/parser" from /home/deviprsd/Projects/CalendarioFX/Calendario/node_modules/@typescript-eslint/eslint-plugin/dist/configs/base.json
2019-08-02T08:32:44.079Z eslint:config-array-factory Loaded: @typescript-eslint/parser@1.13.0 (/home/deviprsd/Projects/CalendarioFX/Calendario/node_modules/@typescript-eslint/parser/dist/parser.js)
2019-08-02T08:32:44.093Z eslint:config-array-factory Loading plugin "@typescript-eslint" from /home/deviprsd/Projects/CalendarioFX/Calendario/node_modules/@typescript-eslint/eslint-plugin/dist/configs/base.json
2019-08-02T08:32:44.093Z eslint:config-array-factory Loaded: @typescript-eslint/eslint-plugin@1.13.0 (/home/deviprsd/Projects/CalendarioFX/Calendario/node_modules/@typescript-eslint/eslint-plugin/dist/index.js)
2019-08-02T08:32:44.093Z eslint:config-array-factory Loading parser "@typescript-eslint/parser" from /home/deviprsd/Projects/CalendarioFX/Calendario/.eslintrc.js
2019-08-02T08:32:44.094Z eslint:config-array-factory Loaded: @typescript-eslint/parser@1.13.0 (/home/deviprsd/Projects/CalendarioFX/Calendario/node_modules/@typescript-eslint/parser/dist/parser.js)
2019-08-02T08:32:44.095Z eslint:config-array-factory Loading plugin "@typescript-eslint" from /home/deviprsd/Projects/CalendarioFX/Calendario/.eslintrc.js
2019-08-02T08:32:44.095Z eslint:config-array-factory Loaded: @typescript-eslint/eslint-plugin@1.13.0 (/home/deviprsd/Projects/CalendarioFX/Calendario/node_modules/@typescript-eslint/eslint-plugin/dist/index.js)
2019-08-02T08:32:44.095Z eslint:cascading-config-array-factory No cache found: /home/deviprsd/Projects/CalendarioFX.
2019-08-02T08:32:44.095Z eslint:config-array-factory Config file not found on /home/deviprsd/Projects/CalendarioFX
2019-08-02T08:32:44.095Z eslint:cascading-config-array-factory No cache found: /home/deviprsd/Projects.
2019-08-02T08:32:44.095Z eslint:config-array-factory Config file not found on /home/deviprsd/Projects
2019-08-02T08:32:44.095Z eslint:cascading-config-array-factory No cache found: /home/deviprsd.
2019-08-02T08:32:44.095Z eslint:cascading-config-array-factory Stop traversing because of considered root.
2019-08-02T08:32:44.097Z eslint:rules Loading rule 'constructor-super' (remaining=265)
2019-08-02T08:32:44.098Z eslint:rules Loading rule 'for-direction' (remaining=264)
2019-08-02T08:32:44.098Z eslint:rules Loading rule 'getter-return' (remaining=263)
2019-08-02T08:32:44.103Z eslint:rules Loading rule 'no-async-promise-executor' (remaining=262)
2019-08-02T08:32:44.103Z eslint:rules Loading rule 'no-case-declarations' (remaining=261)
2019-08-02T08:32:44.104Z eslint:rules Loading rule 'no-class-assign' (remaining=260)
2019-08-02T08:32:44.104Z eslint:rules Loading rule 'no-compare-neg-zero' (remaining=259)
2019-08-02T08:32:44.104Z eslint:rules Loading rule 'no-cond-assign' (remaining=258)
2019-08-02T08:32:44.105Z eslint:rules Loading rule 'no-const-assign' (remaining=257)
2019-08-02T08:32:44.106Z eslint:rules Loading rule 'no-constant-condition' (remaining=256)
2019-08-02T08:32:44.107Z eslint:rules Loading rule 'no-control-regex' (remaining=255)
2019-08-02T08:32:44.109Z eslint:rules Loading rule 'no-debugger' (remaining=254)
2019-08-02T08:32:44.109Z eslint:rules Loading rule 'no-delete-var' (remaining=253)
2019-08-02T08:32:44.109Z eslint:rules Loading rule 'no-dupe-args' (remaining=252)
2019-08-02T08:32:44.110Z eslint:rules Loading rule 'no-dupe-class-members' (remaining=251)
2019-08-02T08:32:44.110Z eslint:rules Loading rule 'no-dupe-keys' (remaining=250)
2019-08-02T08:32:44.110Z eslint:rules Loading rule 'no-duplicate-case' (remaining=249)
2019-08-02T08:32:44.111Z eslint:rules Loading rule 'no-empty' (remaining=248)
2019-08-02T08:32:44.112Z eslint:rules Loading rule 'no-empty-character-class' (remaining=247)
2019-08-02T08:32:44.112Z eslint:rules Loading rule 'no-empty-pattern' (remaining=246)
2019-08-02T08:32:44.112Z eslint:rules Loading rule 'no-ex-assign' (remaining=245)
2019-08-02T08:32:44.113Z eslint:rules Loading rule 'no-extra-boolean-cast' (remaining=244)
2019-08-02T08:32:44.113Z eslint:rules Loading rule 'no-extra-semi' (remaining=243)
2019-08-02T08:32:44.114Z eslint:rules Loading rule 'no-fallthrough' (remaining=242)
2019-08-02T08:32:44.115Z eslint:rules Loading rule 'no-func-assign' (remaining=241)
2019-08-02T08:32:44.115Z eslint:rules Loading rule 'no-global-assign' (remaining=240)
2019-08-02T08:32:44.117Z eslint:rules Loading rule 'no-inner-declarations' (remaining=239)
2019-08-02T08:32:44.118Z eslint:rules Loading rule 'no-invalid-regexp' (remaining=238)
2019-08-02T08:32:44.119Z eslint:rules Loading rule 'no-irregular-whitespace' (remaining=237)
2019-08-02T08:32:44.121Z eslint:rules Loading rule 'no-misleading-character-class' (remaining=236)
2019-08-02T08:32:44.122Z eslint:rules Loading rule 'no-mixed-spaces-and-tabs' (remaining=235)
2019-08-02T08:32:44.123Z eslint:rules Loading rule 'no-new-symbol' (remaining=234)
2019-08-02T08:32:44.123Z eslint:rules Loading rule 'no-obj-calls' (remaining=233)
2019-08-02T08:32:44.123Z eslint:rules Loading rule 'no-octal' (remaining=232)
2019-08-02T08:32:44.123Z eslint:rules Loading rule 'no-prototype-builtins' (remaining=231)
2019-08-02T08:32:44.124Z eslint:rules Loading rule 'no-redeclare' (remaining=230)
2019-08-02T08:32:44.127Z eslint:rules Loading rule 'no-regex-spaces' (remaining=229)
2019-08-02T08:32:44.128Z eslint:rules Loading rule 'no-self-assign' (remaining=228)
2019-08-02T08:32:44.129Z eslint:rules Loading rule 'no-shadow-restricted-names' (remaining=227)
2019-08-02T08:32:44.129Z eslint:rules Loading rule 'no-sparse-arrays' (remaining=226)
2019-08-02T08:32:44.129Z eslint:rules Loading rule 'no-this-before-super' (remaining=225)
2019-08-02T08:32:44.130Z eslint:rules Loading rule 'no-undef' (remaining=224)
2019-08-02T08:32:44.131Z eslint:rules Loading rule 'no-unexpected-multiline' (remaining=223)
2019-08-02T08:32:44.131Z eslint:rules Loading rule 'no-unreachable' (remaining=222)
2019-08-02T08:32:44.131Z eslint:rules Loading rule 'no-unsafe-finally' (remaining=221)
2019-08-02T08:32:44.132Z eslint:rules Loading rule 'no-unsafe-negation' (remaining=220)
2019-08-02T08:32:44.132Z eslint:rules Loading rule 'no-unused-labels' (remaining=219)
2019-08-02T08:32:44.132Z eslint:rules Loading rule 'no-unused-vars' (remaining=218)
2019-08-02T08:32:44.135Z eslint:rules Loading rule 'no-useless-catch' (remaining=217)
2019-08-02T08:32:44.135Z eslint:rules Loading rule 'no-useless-escape' (remaining=216)
2019-08-02T08:32:44.136Z eslint:rules Loading rule 'no-with' (remaining=215)
2019-08-02T08:32:44.136Z eslint:rules Loading rule 'require-atomic-updates' (remaining=214)
2019-08-02T08:32:44.137Z eslint:rules Loading rule 'require-yield' (remaining=213)
2019-08-02T08:32:44.138Z eslint:rules Loading rule 'use-isnan' (remaining=212)
2019-08-02T08:32:44.138Z eslint:rules Loading rule 'valid-typeof' (remaining=211)
2019-08-02T08:32:44.139Z eslint:rules Loading rule 'no-var' (remaining=210)
2019-08-02T08:32:44.139Z eslint:rules Loading rule 'prefer-const' (remaining=209)
2019-08-02T08:32:44.141Z eslint:rules Loading rule 'prefer-rest-params' (remaining=208)
2019-08-02T08:32:44.141Z eslint:rules Loading rule 'prefer-spread' (remaining=207)
2019-08-02T08:32:44.144Z eslint:rules Loading rule 'camelcase' (remaining=206)
2019-08-02T08:32:44.148Z eslint:rules Loading rule 'indent' (remaining=205)
2019-08-02T08:32:44.167Z eslint:rules Loading rule 'no-array-constructor' (remaining=204)
2019-08-02T08:32:44.173Z eslint:rules Loading rule 'no-use-before-define' (remaining=203)
2019-08-02T08:32:44.176Z eslint:rules Loading rule 'linebreak-style' (remaining=202)
2019-08-02T08:32:44.177Z eslint:rules Loading rule 'quotes' (remaining=201)
2019-08-02T08:32:44.179Z eslint:rules Loading rule 'semi' (remaining=200)
2019-08-02T08:32:44.181Z eslint:rules Loading rule 'sort-keys' (remaining=199)
2019-08-02T08:32:44.184Z eslint:cascading-config-array-factory Configuration was determined: ConfigArray [ { name: '.eslintrc.js » eslint:recommended', filePath: '/usr/lib/node_modules/eslint/conf/eslint-recommended.js', criteria: null, env: undefined, globals: undefined, parser: undefined, parserOptions: undefined, plugins: undefined, processor: undefined, root: undefined, rules: { 'constructor-super': 'error', 'for-direction': 'error', 'getter-return': 'error', 'no-async-promise-executor': 'error', 'no-case-declarations': 'error', 'no-class-assign': 'error', 'no-compare-neg-zero': 'error', 'no-cond-assign': 'error', 'no-const-assign': 'error', 'no-constant-condition': 'error', 'no-control-regex': 'error', 'no-debugger': 'error', 'no-delete-var': 'error', 'no-dupe-args': 'error', 'no-dupe-class-members': 'error', 'no-dupe-keys': 'error', 'no-duplicate-case': 'error', 'no-empty': 'error', 'no-empty-character-class': 'error', 'no-empty-pattern': 'error', 'no-ex-assign': 'error', 'no-extra-boolean-cast': 'error', 'no-extra-semi': 'error', 'no-fallthrough': 'error', 'no-func-assign': 'error', 'no-global-assign': 'error', 'no-inner-declarations': 'error', 'no-invalid-regexp': 'error', 'no-irregular-whitespace': 'error', 'no-misleading-character-class': 'error', 'no-mixed-spaces-and-tabs': 'error', 'no-new-symbol': 'error', 'no-obj-calls': 'error', 'no-octal': 'error', 'no-prototype-builtins': 'error', 'no-redeclare': 'error', 'no-regex-spaces': 'error', 'no-self-assign': 'error', 'no-shadow-restricted-names': 'error', 'no-sparse-arrays': 'error', 'no-this-before-super': 'error', 'no-undef': 'error', 'no-unexpected-multiline': 'error', 'no-unreachable': 'error', 'no-unsafe-finally': 'error', 'no-unsafe-negation': 'error', 'no-unused-labels': 'error', 'no-unused-vars': 'error', 'no-useless-catch': 'error', 'no-useless-escape': 'error', 'no-with': 'error', 'require-atomic-updates': 'error', 'require-yield': 'error', 'use-isnan': 'error', 'valid-typeof': 'error' }, settings: undefined }, { name: '.eslintrc.js » plugin:@typescript-eslint/eslint-recommended', filePath: '/home/deviprsd/Projects/CalendarioFX/Calendario/node_modules/@typescript-eslint/eslint-plugin/dist/index.js', criteria: null, env: undefined, globals: undefined, parser: undefined, parserOptions: undefined, plugins: undefined, processor: undefined, root: undefined, rules: undefined, settings: undefined }, { name: '.eslintrc.js » plugin:@typescript-eslint/eslint-recommended#overrides[0]', filePath: '/home/deviprsd/Projects/CalendarioFX/Calendario/node_modules/@typescript-eslint/eslint-plugin/dist/index.js', criteria: { includes: [Array], excludes: null, basePath: '/home/deviprsd/Projects/CalendarioFX/Calendario' }, env: undefined, globals: undefined, parser: undefined, parserOptions: undefined, plugins: undefined, processor: undefined, root: undefined, rules: { 'getter-return': 'off', 'no-dupe-args': 'off', 'no-dupe-keys': 'off', 'no-unreachable': 'off', 'valid-typeof': 'off', 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'@typescript-eslint': [Object] }, processor: undefined, root: undefined, rules: undefined, settings: undefined }, { name: '.eslintrc.js » plugin:@typescript-eslint/recommended', filePath: '/home/deviprsd/Projects/CalendarioFX/Calendario/node_modules/@typescript-eslint/eslint-plugin/dist/index.js', criteria: null, env: undefined, globals: undefined, parser: undefined, parserOptions: undefined, plugins: undefined, processor: undefined, root: undefined, rules: { '@typescript-eslint/adjacent-overload-signatures': 'error', '@typescript-eslint/array-type': 'error', '@typescript-eslint/ban-types': 'error', camelcase: 'off', '@typescript-eslint/camelcase': 'error', '@typescript-eslint/class-name-casing': 'error', '@typescript-eslint/explicit-function-return-type': 'warn', '@typescript-eslint/explicit-member-accessibility': 'error', indent: 'off', '@typescript-eslint/indent': 'error', '@typescript-eslint/interface-name-prefix': 'error', '@typescript-eslint/member-delimiter-style': 'error', 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name: '.eslintrc.js', filePath: '/home/deviprsd/Projects/CalendarioFX/Calendario/.eslintrc.js', criteria: null, env: { es6: true, node: true, browser: true }, globals: { Atomics: 'readonly', SharedArrayBuffer: 'readonly' }, parser: { error: null, filePath: '/home/deviprsd/Projects/CalendarioFX/Calendario/node_modules/@typescript-eslint/parser/dist/parser.js', id: '@typescript-eslint/parser', importerName: '.eslintrc.js', importerPath: '/home/deviprsd/Projects/CalendarioFX/Calendario/.eslintrc.js' }, parserOptions: { project: [Object], tsconfigRootDir: './' }, plugins: { '@typescript-eslint': [Object] }, processor: undefined, root: undefined, rules: { indent: [Array], 'linebreak-style': [Array], quotes: [Array], semi: [Array], 'sort-keys': [Array] }, settings: undefined } ] on /home/deviprsd/Projects/CalendarioFX/Calendario/src
2019-08-02T08:32:44.186Z eslint:ignored-paths contains:
2019-08-02T08:32:44.187Z eslint:ignored-paths   target   = "/home/deviprsd/Projects/CalendarioFX/Calendario/src/index.ts"
2019-08-02T08:32:44.187Z eslint:ignored-paths   base     = "/home/deviprsd/Projects/CalendarioFX/Calendario"
2019-08-02T08:32:44.187Z eslint:ignored-paths   relative = "src/index.ts"
2019-08-02T08:32:44.187Z eslint:ignored-paths   result   = false
2019-08-02T08:32:44.188Z eslint:cli-engine Lint /home/deviprsd/Projects/CalendarioFX/Calendario/src/index.ts
2019-08-02T08:32:44.188Z eslint:linter Linting code for /home/deviprsd/Projects/CalendarioFX/Calendario/src/index.ts (pass 1)
2019-08-02T08:32:44.188Z eslint:linter Verify
2019-08-02T08:32:44.188Z eslint:linter With ConfigArray: /home/deviprsd/Projects/CalendarioFX/Calendario/src/index.ts
2019-08-02T08:32:44.306Z eslint:linter An error occurred while traversing
2019-08-02T08:32:44.306Z eslint:linter Filename: /home/deviprsd/Projects/CalendarioFX/Calendario/src/index.ts
2019-08-02T08:32:44.306Z eslint:linter Line: 1
2019-08-02T08:32:44.306Z eslint:linter Parser Options: { ecmaVersion: 6,
  ecmaFeatures: { globalReturn: false },
  project:
   { extends: './tsconfig.json',
     includes: [ 'src/**/*.ts', 'test/**/*.ts' ] },
  tsconfigRootDir: './',
  sourceType: 'module' }
2019-08-02T08:32:44.306Z eslint:linter Parser Path: /home/deviprsd/Projects/CalendarioFX/Calendario/node_modules/@typescript-eslint/parser/dist/parser.js
2019-08-02T08:32:44.306Z eslint:linter Settings: {}
TypeError: Cannot read property 'loc' of undefined
Occurred while linting /home/deviprsd/Projects/CalendarioFX/Calendario/src/index.ts:1
    at Object.VariableDeclaration [as listener] (/usr/lib/node_modules/eslint/lib/rules/indent.js:1370:69)
    at Program:exit.listenerCallQueue.filter.forEach.nodeInfo (/usr/lib/node_modules/eslint/lib/rules/indent.js:1546:55)
    at Array.forEach (<anonymous>)
    at Program:exit (/usr/lib/node_modules/eslint/lib/rules/indent.js:1546:26)
    at listeners.(anonymous function).forEach.listener (/usr/lib/node_modules/eslint/lib/linter/safe-emitter.js:45:58)
    at Array.forEach (<anonymous>)
    at Object.emit (/usr/lib/node_modules/eslint/lib/linter/safe-emitter.js:45:38)
    at NodeEventGenerator.applySelector (/usr/lib/node_modules/eslint/lib/linter/node-event-generator.js:253:26)
    at NodeEventGenerator.applySelectors (/usr/lib/node_modules/eslint/lib/linter/node-event-generator.js:282:22)
    at NodeEventGenerator.leaveNode (/usr/lib/node_modules/eslint/lib/linter/node-event-generator.js:305:14)

ESlint config

module.exports = {
    'env': {
        'es6': true,
        'node': true,
        'browser': true
    },
    'extends': [
        'eslint:recommended',
        'plugin:@typescript-eslint/eslint-recommended',
        'plugin:@typescript-eslint/recommended'
    ],
    'globals': {
        'Atomics': 'readonly',
        'SharedArrayBuffer': 'readonly'
    },
    'parser': '@typescript-eslint/parser',
    'parserOptions': {
        'project': {
            'extends': './tsconfig.json',
            'includes': [
                "src/**/*.ts",
                "test/**/*.ts"
            ]
        },
        'tsconfigRootDir': './'
    },
    'plugins': ['@typescript-eslint'],
    'rules': {
        'indent': [
            'error',
            4
        ],
        'linebreak-style': [
            'error',
            'unix'
        ],
        'quotes': [
            'error',
            'single'
        ],
        'semi': [
            'error',
            'never'
        ],
        'sort-keys': [
            'error',
            'asc'
        ]
    }
}

Dependencies

{
    "@typescript-eslint/eslint-plugin": "^1.13.0",
    ...
}

package	version
@typescript-eslint/parser	1.13.0
TypeScript	3.5.3
ESLint	6.1.0
node	10.16.0
npm	6.10.2

[bradzacher]

It looks like you're not using our version of indent...

-       'indent': [
+       '@typescript-eslint/indent': [
            'error',
            4
        ],

[deviprsd]

Yup that fixes it.

[psatler]

I don't know if this will help other people running into this problem, but I was setting a Typescript React project the other day and I run into this same error when typing const.

TL;DR: I fixed this by adding plugin:prettier/recommended as the last config in the extends array of .eslintrc.js file.

I set up .eslint using the eslint --init CLI. Though, when typing const (like shown at #441 (comment)), it threw me this ESLint: Cannot read property 'loc' of undefined error.

In order to fix this, I needed to add "plugin:prettier/recommended" to the extends array in the .eslintrc.js file. After doing this, the error was gone. So, my extends in the .eslintrc.js file became:

extends: [
    'airbnb',
    'plugin:react/recommended', // Uses the recommended rules from @eslint-plugin-react
    'plugin:@typescript-eslint/recommended', // Uses the recommended rules from the @typescript-eslint/eslint-plugin
    "prettier/@typescript-eslint", // Uses eslint-config-prettier to disable ESLint rules from @typescript-eslint/eslint-plugin that would conflict with prettier
    "plugin:prettier/recommended" // Enables eslint-plugin-prettier and eslint-config-prettier. This will display prettier errors as ESLint errors. Make sure this is always the last configuration in the extends array.
  ],

I don't know if this will help other people running into this problem, but I was setting a Typescript React project the other day and I run into this same error when typing const.

TL;DR: I fixed this by adding plugin:prettier/recommended as the last config in the extends array of .eslintrc.js file.

I set up .eslint using the eslint --init CLI. Though, when typing const (like shown at #441 (comment)), it threw me this ESLint: Cannot read property 'loc' of undefined error.

In order to fix this, I needed to add "plugin:prettier/recommended" to the extends array in the .eslintrc.js file. After doing this, the error was gone. So, my extends in the .eslintrc.js file became:

extends: [
    'airbnb',
    'plugin:react/recommended', // Uses the recommended rules from @eslint-plugin-react
    'plugin:@typescript-eslint/recommended', // Uses the recommended rules from the @typescript-eslint/eslint-plugin
    "prettier/@typescript-eslint", // Uses eslint-config-prettier to disable ESLint rules from @typescript-eslint/eslint-plugin that would conflict with prettier
    "plugin:prettier/recommended" // Enables eslint-plugin-prettier and eslint-config-prettier. This will display prettier errors as ESLint errors. Make sure this is always the last configuration in the extends array.
  ],

Thanks a lot, solved !!

[bradzacher]

It fixed it because it disabled the base indent rule.
Follow the step that I outlined above, and it'll fix it as well.

I also notice that you are using the airbnb config. This config doesn't support our plugin, so you'll end up with a lot of the wrong rules turned on.

Consider using https://www.npmjs.com/package/eslint-config-airbnb-typescript instead.