[iOS] 0.56.0 React Native version mismatch. regeneratorRuntime is not defined

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• Search for existing issues: https://github.com/facebook/react-native/issues
• Use the latest React Native release: https://github.com/facebook/react-native/releases

Environment

Run react-native info in your terminal and paste its contents here.

  React Native Environment Info:
    System:
      OS: macOS High Sierra 10.13.6
      CPU: x64 Intel(R) Core(TM) i5-5257U CPU @ 2.70GHz
      Memory: 130.34 MB / 8.00 GB
      Shell: 5.3 - /bin/zsh
    Binaries:
      Node: 10.1.0 - /usr/local/bin/node
      Yarn: 1.6.0 - /usr/local/bin/yarn
      npm: 6.0.1 - /usr/local/bin/npm
      Watchman: 4.9.0 - /usr/local/bin/watchman
    SDKs:
      iOS SDK:
        Platforms: iOS 11.4, macOS 10.13, tvOS 11.4, watchOS 4.3
      Android SDK:
        Build Tools: 23.0.1, 23.0.2, 23.0.3, 25.0.0, 25.0.1, 25.0.2, 25.0.3, 26.0.1, 26.0.2, 26.0.3, 27.0.1, 27.0.3
        API Levels: 22, 23, 24, 25, 26, 27
    IDEs:
      Android Studio: 3.1 AI-173.4720617
      Xcode: 9.4.1/9F2000 - /usr/bin/xcodebuild
    npmPackages:
      react: 16.4.2 => 16.4.2
      react-native: 0.56.0 => 0.56.0
    npmGlobalPackages:
      react-native-calendario: 0.0.2
      react-native-cli: 2.0.1
      react-native-create-bridge: 1.2.2
      react-native-create-library: 3.1.2
      react-native-git-upgrade: 0.2.7

Description

React Native version mismatch.

JavaScript version: 0.56.0 Native version: 0.55.3

Make sure that you have rebuilt the native code. If the problem persists try clearing the Watchman and packager caches with watchman watch-del-all && react-native start --reset-cache. regeneratorRuntime is not defined

It only happens in iOS on Debug mode. It works fine on Release mode or Android.

Reproducible Demo

https://github.com/maggialejandro/react-native-calendario/tree/fix-react-native-0.56.0

[JWWon]

Reset cache wasn’t worked for me. For me, deleting whole build file and restart worked.

rm -rf ios/build
react-native run-ios

[jamsch]

Have you fully uninstalled the app on the simulator/device? It’s possible that the build may be failing and instead launching a previous version of the app.