Vue-cli: AirBnb ESLint config, `no-param-reassign` warning in `vuex` mutation

[MaximBazarov]

Version

3.7.0

Reproduction link

https://github.com/MaximBazarov/vuex-eslint-mutation-warning

Environment info

  System:
    OS: macOS Mojave 10.14.4
    CPU: (8) x64 Intel(R) Core(TM) i7-3615QM CPU @ 2.30GHz
  Binaries:
    Node: 10.15.3 - /usr/local/bin/node
    Yarn: 1.15.2 - /usr/local/bin/yarn
    npm: 6.4.1 - /usr/local/bin/npm
  Browsers:
    Chrome: 74.0.3729.131
    Firefox: Not Found
    Safari: 12.1
  npmPackages:
    @kazupon/vue-i18n-loader: ^0.3.0 => 0.3.0 
    @vue/babel-helper-vue-jsx-merge-props:  1.0.0-beta.3 
    @vue/babel-plugin-transform-vue-jsx:  1.0.0-beta.3 
    @vue/babel-preset-app:  3.7.0 
    @vue/babel-preset-jsx:  1.0.0-beta.3 
    @vue/babel-sugar-functional-vue:  1.0.0-beta.3 
    @vue/babel-sugar-inject-h:  1.0.0-beta.3 
    @vue/babel-sugar-v-model:  1.0.0-beta.3 
    @vue/babel-sugar-v-on:  1.0.0-beta.3 
    @vue/cli-overlay:  3.7.0 
    @vue/cli-plugin-babel: ^3.7.0 => 3.7.0 
    @vue/cli-plugin-eslint: ^3.7.0 => 3.7.0 
    @vue/cli-plugin-unit-jest: ^3.7.0 => 3.7.0 
    @vue/cli-service: ^3.7.0 => 3.7.0 
    @vue/cli-shared-utils:  3.7.0 
    @vue/component-compiler-utils:  2.6.0 
    @vue/eslint-config-airbnb: ^4.0.0 => 4.0.0 
    @vue/preload-webpack-plugin:  1.1.0 
    @vue/test-utils: 1.0.0-beta.29 => 1.0.0-beta.29 
    @vue/web-component-wrapper:  1.2.0 
    eslint-plugin-vue: ^5.0.0 => 5.2.2 
    jest-serializer-vue:  2.0.2 
    vue: ^2.6.10 => 2.6.10 
    vue-cli-plugin-i18n: ^0.6.0 => 0.6.0 
    vue-eslint-parser:  2.0.3 
    vue-hot-reload-api:  2.3.3 
    vue-i18n: ^8.11.2 => 8.11.2 
    vue-i18n-extract:  0.4.14 
    vue-i18n-ts:  0.1.0 
    vue-jest:  3.0.4 
    vue-loader:  15.7.0 
    vue-router: ^3.0.3 => 3.0.6 
    vue-select: ^3.0.2 => 3.0.2 
    vue-style-loader:  4.1.2 
    vue-template-compiler: ^2.5.21 => 2.6.10 
    vue-template-es2015-compiler:  1.9.1 
    vuex: ^3.0.1 => 3.1.0 
  npmGlobalPackages:
    @vue/cli: Not Found

Steps to reproduce

Vuex store mutation:

state = {...}

What is expected?

no ESLint warnings

What is actually happening?

ESLint no-param-reassign warning

---

it was fixed in
https://github.com/vuejs-templates/webpack/pull/1003/files#diff-8e97c989db32864ed48507016adcb32d

but seems that it wasn't applied.

[MaximBazarov]

warning is here: https://github.com/MaximBazarov/vuex-eslint-mutation-warning/blob/17a4a999798bf88fbe5259f4251a3a85aae4d442/src/store.js#L12

[MaximBazarov]

btw, here's workaround I used:
in package,json -> eslintConfig -> rules

"no-param-reassign": [
    "error",
    {
      "props": true,
      "ignorePropertyModificationsFor": [
        "state"
      ]
    }
]

[lloydjatkinson]

Also seeing this problem. Thanks for the fix @MaximBazarov.