[babel 6] SyntaxError: Unexpected token: async () => {

[BerndWessels]

Hello

I am testing the new babel 6 support with "babel-plugin-react-transform": "^2.0.0-beta1" but get a syntax error, see below.

Is this a babel 6 issue or related to this plugin?

> babel-node --eval "require('./scripts/externalsUpdate')().catch(err => console.error(err.stack))"

/usr/local/lib/node_modules/babel-cli/node_modules/babel-core/lib/transformation/file/index.js:547
      throw err;
      ^

SyntaxError: /Users/bernd/WebstormProjects/react-webpack/scripts/externalsUpdate.js: Unexpected token (20:49)
  18 | 
  19 | // Save JSON of full schema introspection for Babel Relay Plugin to use
> 20 | export default task('update externals', async () => {
     |                                                  ^
  21 | 
  22 |   // react
  23 |   console.log('copying react v' + react.version);
    at Parser.pp.raise (/usr/local/lib/node_modules/babel-cli/node_modules/babylon/lib/parser/location.js:22:13)
    at Parser.pp.unexpected (/usr/local/lib/node_modules/babel-cli/node_modules/babylon/lib/parser/util.js:91:8)
    at Parser.pp.parseAsyncArrowFromCallExpression (/usr/local/lib/node_modules/babel-cli/node_modules/babylon/lib/parser/expression.js:357:47)
    at Parser.<anonymous> (/usr/local/lib/node_modules/babel-cli/node_modules/babylon/lib/plugins/flow.js:972:20)
    at Parser.parseAsyncArrowFromCallExpression (/usr/local/lib/node_modules/babel-cli/node_modules/babylon/lib/plugins/flow.js:972:20)
    at Parser.pp.parseSubscripts (/usr/local/lib/node_modules/babel-cli/node_modules/babylon/lib/parser/expression.js:308:21)
    at Parser.pp.parseExprSubscripts (/usr/local/lib/node_modules/babel-cli/node_modules/babylon/lib/parser/expression.js:275:15)
    at Parser.pp.parseMaybeUnary (/usr/local/lib/node_modules/babel-cli/node_modules/babylon/lib/parser/expression.js:245:19)
    at Parser.pp.parseExprOps (/usr/local/lib/node_modules/babel-cli/node_modules/babylon/lib/parser/expression.js:176:19)
    at Parser.pp.parseMaybeConditional (/usr/local/lib/node_modules/babel-cli/node_modules/babylon/lib/parser/expression.js:158:19)

This is my .babelrc

{
  "presets": ["react", "es2015"],
  "env": {
    "development": {
      "plugins": [
        [
          "babel-relay-plugin-loader",
          "react-transform", {
            "transforms": [{
              "transform": "react-transform-hmr",
              "imports": ["react"],
              "locals": ["module"]
            }, {
              "transform": "react-transform-catch-errors",
              "imports": ["react", "redbox-react"]
            }]
        }]
      ]
    },
    "production": {
      "plugins": [
        [
          "babel-relay-plugin-loader"
        ]
      ]
    }
  }
}

And these are my dependencies - all up to the latest within their semver rule:

"dependencies": {
  "bootstrap": "^3.0.0",
  "history": "^1.0.0",
  "lodash": "^3.0.0",
  "mysql": "^2.0.0",
  "react": "^0.14.0",
  "react-bootstrap": "^0.28.0",
  "react-dom": "^0.14.0",
  "react-relay": "^0.6.0",
  "react-router": "^1.0.0",
  "react-router-relay": "^0.8.0",
  "sequelize": "^3.0.0"
},
"devDependencies": {
  "autoprefixer": "^6.0.0",
  "babel-core": "^6.0.0",
  "babel-eslint": "^5.0.0-beta4",
  "babel-loader": "^6.0.0",
  "babel-plugin-react-transform": "^2.0.0-beta1",
  "babel-preset-es2015": "^6.0.0",
  "babel-preset-react": "^6.0.0",
  "babel-relay-plugin": "^0.6.0",
  "babel-relay-plugin-loader": "^0.6.0",
  "browser-sync": "^2.0.0",
  "browser-sync-webpack-plugin": "^1.0.0",
  "clean-webpack-plugin": "^0.1.0",
  "copy-webpack-plugin": "^0.3.0",
  "cors": "^2.0.0",
  "css-loader": "^0.23.0",
  "express": "^4.0.0",
  "express-graphql": "^0.4.0",
  "extract-text-webpack-plugin": "^0.9.0",
  "faker": "^3.0.0",
  "file-loader": "^0.8.0",
  "graphiql": "^0.4.0",
  "graphql": "^0.4.0",
  "graphql-relay": "^0.3.0",
  "history": "^1.0.0",
  "html-webpack-plugin": "^1.0.0",
  "isparta-instrumenter-loader": "^1.0.0",
  "jasmine-core": "^2.0.0",
  "karma": "^0.13.0",
  "karma-chrome-launcher": "^0.2.0",
  "karma-coverage": "^0.5.0",
  "karma-jasmine": "^0.3.0",
  "karma-phantomjs-launcher": "^0.2.0",
  "karma-sourcemap-loader": "^0.3.0",
  "karma-spec-reporter": "^0.0.23",
  "karma-webpack": "^1.0.0",
  "less": "^2.0.0",
  "less-loader": "^2.0.0",
  "node-libs-browser": "^0.5.0",
  "null-loader": "^0.1.0",
  "phantomjs": "^1.0.0",
  "postcss-loader": "^0.8.0",
  "q": "^1.0.0",
  "raw-loader": "^0.5.0",
  "react-transform-catch-errors": "^1.0.0",
  "react-transform-hmr": "^1.0.0",
  "redbox-react": "^1.0.0",
  "relay-local-schema": "^0.3.0",
  "style-loader": "^0.13.0",
  "webpack": "^1.0.0",
  "webpack-dev-server": "^1.0.0"
}

[jamiebuilds]

This has nothing to do with this plugin, but you're missing the plugin/preset for async functions. Async functions are not part of es2015.

Please take your general Babel questions to https://slack.babeljs.io or https://discuss.babeljs.io in the future.