expo: expo-dev-client crashes on launch with jsEngine hermes in Expo SDK 47

Summary

In a blank typescript expo sdk 47 project with the expo-dev-client installed, the dev-client crashes on launch when "jsEngine": "hermes" is configured. From both expo run:ios -d or eas build --local. Removing “jsEngine”:“hermes” and doing a clean prebuild resolves the issue. Android builds and launches fine with hermes enabled.

Managed or bare workflow?

managed

What platform(s) does this occur on?

iOS

Package versions

  "dependencies": {
    "expo": "~47.0.3",
    "expo-dev-client": "~2.0.0",
    "expo-status-bar": "~1.4.2",
    "react": "18.1.0",
    "react-dom": "18.1.0",
    "react-native": "0.70.5",
    "react-native-web": "~0.18.9",
    "expo-splash-screen": "~0.17.4"
  },
  "devDependencies": {
    "@babel/core": "^7.12.9",
    "@types/react": "~18.0.14",
    "@types/react-native": "~0.70.6",
    "typescript": "^4.6.3"
  },

Environment

  expo-env-info 1.0.5 environment info:
    System:
      OS: macOS 12.5
      Shell: 3.2.57 - /bin/bash
    Binaries:
      Node: 14.18.1 - ~/.nvm/versions/node/v14.18.1/bin/node
      Yarn: 1.22.18 - ~/.nvm/versions/node/v14.18.1/bin/yarn
      npm: 6.14.15 - ~/.nvm/versions/node/v14.18.1/bin/npm
      Watchman: 2022.10.31.00 - /usr/local/bin/watchman
    Managers:
      CocoaPods: 1.11.3 - /Users/tyrauber/.rvm/gems/ruby-2.6.3/bin/pod
    SDKs:
      iOS SDK:
        Platforms: DriverKit 22.1, iOS 16.1, macOS 13.0, tvOS 16.1, watchOS 9.1
    IDEs:
      Android Studio: 2020.3 AI-203.7717.56.2031.7935034
      Xcode: 14.1/14B47b - /usr/bin/xcodebuild
    npmPackages:
      expo: ~47.0.3 => 47.0.3 
      react: 18.1.0 => 18.1.0 
      react-dom: 18.1.0 => 18.1.0 
      react-native: 0.70.5 => 0.70.5 
      react-native-web: ~0.18.9 => 0.18.10 
    npmGlobalPackages:
      eas-cli: 2.6.0
      expo-cli: 6.0.8
    Expo Workflow: bare

Reproducible demo

• expo init a new SDK 47 typescript blank project.
• expo install expo-dev-client
• Add "jsEngine": "Hermes" to App.json
• expo prebuild --clean
• expo run:ios -d

Immediate crash on launch of expo dev client.

• eas build --local has the same result.

Building on EAS, I see the following error:

❌  ld: '/Users/expo/Library/Developer/Xcode/DerivedData/expo47hermes-ahzelgosugfnasazrehjslikbwpu/Build/Intermediates.noindex/ArchiveIntermediates/expo47hermes/BuildProductsPath/Release-iphoneos/XCFrameworkIntermediates/EXFileSystem/EXFileSystem.framework/EXFileSystem(EXFileSystemAssetLibraryHandler.o)' does not contain bitcode. You must rebuild it with bitcode enabled (Xcode setting ENABLE_BITCODE), obtain an updated library from the vendor, or disable bitcode for this target. file '/Users/expo/Library/Developer/Xcode/DerivedData/expo47hermes-ahzelgosugfnasazrehjslikbwpu/Build/Intermediates.noindex/ArchiveIntermediates/expo47hermes/BuildProductsPath/Release-iphoneos/XCFrameworkIntermediates/EXFileSystem/EXFileSystem.framework/EXFileSystem' for architecture arm64

If I add "bitcode": "Debug" to the ios declaration in app.json, run expo prebuild --clean and push a new build to eas, I see the following error:

❌  Undefined symbols for architecture arm64
┌─ Symbol: _objc_msgSend$storyboardWithName:bundle:
└─ Referenced from: l001 in EXSplashScreen(EXSplashScreenViewNativeProvider.o)

❌  ld: symbol(s) not found for architecture arm64


❌  clang: error: linker command failed with exit code 1 (use -v to see invocation)

Stacktrace (if a crash is involved)

ASI found [dyld] (sensitive) ‘Library not loaded: ‘@rpath/hermes.framework/hermes’ Referenced from: ‘/private/var/containers/Bundle/Application/BDAD3C0A-943F-4416-851D-A0FF21314832/expo47hermes.app/expo47hermes’ Reason: tried: ‘/usr/lib/swift/hermes.framework/hermes’ (no such file), ‘/usr/lib/swift/hermes.framework/hermes’ (no such file), ‘/private/var/containers/Bundle/Application/BDAD3C0A-943F-4416-851D-A0FF21314832/expo47hermes.app/Frameworks/hermes.framework/hermes’ (no such file), ‘/usr/lib/swift/hermes.framework/hermes’ (no such file), ‘/usr/lib/swift/hermes.framework/hermes’ (no such file), ‘/private/var/containers/Bundle/Application/BDAD3C0A-943F-4416-851D-A0FF21314832/expo47hermes.app/Frameworks/hermes.framework/hermes’ (no such file), ‘/System/Library/Frameworks/hermes.framework/hermes’ (no such file)’