"Can't find variable: t" error on react native production build

[alexbeckwith]

Description

Using expo/react-native with version 4.4.1, production builds produce the above error. Seems like the same thing as 151?

Steps to Reproduce

Steps to reproduce the behavior:

1. Create expo app via expo init {appname}
2. yarn add typesafe-actions@4.4.1
3. Create action creator with createStandardAction and a reducer using getType
4. Run production build with expo r --no-dev

Project Dependencies

• Typesafe-Actions Version: 4.4.1

• TypeScript Version: 3.4.5

• expo-cli version 2.19.2

• tsconfig.json:

  {
  "compilerOptions": {
  "noEmit": true,
  "lib": ["dom", "esnext"],
  "jsx": "react-native",
  "moduleResolution": "node",
  "allowSyntheticDefaultImports": true,
  "skipLibCheck": true
  }
  }

• babel.config.js

  module.exports = function(api) {
  api.cache(true);
  return {
  presets: ['babel-preset-expo'],
  };
  };

Environment (optional)

• React Native: 0.59.8

[robertying]

Confirmed it was introduced in 4.4.1, downgrading to 4.4.0 resolves the issue.

[piotrwitek]

I found the root issue. Rollup dependency introduced a breaking change between 1.13 => 1.14, so emitted bundle code is changed:

1.13:

function n(n, t) {
  return void 0 === t && (t = 1), null == n;
}

1.14:

function n(n, t) {
  return null == n;
}

I will downgrade and lock rollup dependency until further investigation and viable solution is found.