Arguments: 
  /Users/fgm/.nvm/versions/node/v10.18.0/bin/node /Users/fgm/.yarn/bin/yarn.js add --dev webpack@^3.3.0 webpack-dev-server@^2.5.1

PATH: 
  /Users/fgm/Downloads/Installables/google-cloud-sdk/bin:/Users/fgm/.nvm/versions/node/v10.18.0/bin:/usr/local/opt/php@7.2/sbin:/usr/local/opt/php@7.2/bin:./bin:./vendor/bin:~/.composer/vendor/bin:/Users/fgm/.yarn/bin:/usr/local/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/mysql/bin:/Library/TeX/texbin:/usr/local/go/bin:/opt/X11/bin:.:/Users/fgm/npm/bin:/Users/fgm/src/go/bin:/Users/fgm/Library/Android/sdk/tools:/Users/fgm/Library/Android/sdk/platform-tools:/usr/local/texlive/2019/bin/x86_64-darwin/

Yarn version: 
  1.21.1

Node version: 
  10.18.0

Platform: 
  darwin x64

Trace: 
  SyntaxError: /Users/fgm/src/js/webpack/fundamentals/package.json: Unexpected token } in JSON at position 243
      at JSON.parse (<anonymous>)
      at /Users/fgm/.yarn/lib/cli.js:1625:59
      at Generator.next (<anonymous>)
      at step (/Users/fgm/.yarn/lib/cli.js:310:30)
      at /Users/fgm/.yarn/lib/cli.js:321:13

npm manifest: 
  {
    "author": "Frederic G. MARAND <fgm@osinet.fr>",
    "description": "Web Fundamentals",
    "devDependencies": {
      "prettier": "^1.19.1"
    },
    "license": "MIT",
    "main": "build/index.js",
    "name": "web_fundamentals",
    "version": "1.0.0",
  }

yarn manifest: 
  No manifest

Lockfile: 
  # THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
  # yarn lockfile v1
  
  
  prettier@^1.19.1:
    version "1.19.1"
    resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.19.1.tgz#f7d7f5ff8a9cd872a7be4ca142095956a60797cb"
    integrity sha512-s7PoyDv/II1ObgQunCbB9PdLmUcBZcnWOcxDh7O0N/UwDEsHyqkW+Qh28jW+mVuCdx7gLB0BotYI1Y6uI9iyew==