scriptURL is null when building for Release with Xcode

Current Behavior

When building with the release build configuration in Xcode, I’m getting the following build error:

Terminating app due to uncaught exception 'RCTFatalException: Unhandled JS Exception: null is not an object (evaluating 't.match(/(^.+)\/index/)[1]')

The error is referring to the minified version of this line, so it seems that NativeModules.SourceCode.scriptURL being imported from react-native is null.

I’m getting this when using haul version 1.0.0-beta-12. With 1.0.0-beta-11, it works just fine (it doesn’t include the line that is causing the error).

Expected Behavior

The build should complete without error as it does in beta-11.

Haul Configuration (webpack.haul.js)

const eslintFormatter = require('react-dev-utils/eslintFormatter')
const paths = require('./paths')

module.exports = ({ platform }, defaults) => ({
  entry: `./index.js`,
  module: {
    ...defaults.module,
    rules: [
      ...defaults.module.rules,
      {
        test: /\.(js|jsx)$/,
        enforce: 'pre',
        use: [
          {
            options: {
              formatter: eslintFormatter,
            },
            loader: require.resolve('eslint-loader'),
          },
        ],
        include: paths.appSrc,
      },
      {
        test: /\.graphql$/,
        exclude: /node_modules/,
        loader: 'graphql-tag/loader',
      },
    ],
  },
})

Your Environment

software	version
Haul	1.0.0-beta-12
react-native	0.52.0
node	8.9.4
npm or yarn	yarn

[satya164]

Makes sense that scriptURL is not available in production. Changing global.DEV_SERVER_ORIGIN = scriptURL.match(/(^.+)\/index/)[1]; to global.DEV_SERVER_ORIGIN = scriptURL ? scriptURL.match(/(^.+)\/index/)[1] : null; should fix the issue. What do you think @zamotany ?

[czystyl]

Not exactly because scriptUrl is always a string but regex not matched then we try to get [1] element form null and BOOM! I created PR to fix this.