App crashes with `dyld[38734]: symbol not found in flat namespace '_jump_fcontext'` with `use_frameworks!`

[louiszawadzki]

New Version

0.73.0-rc.1

Old Version

0.72.5

Build Target(s)

iOS simulator

Output of react-native info

System:
  OS: macOS 13.5.2
  CPU: (10) arm64 Apple M1 Max
  Memory: 23.29 GB / 64.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 18.16.1
    path: /var/folders/5l/y80kyhh93kl22_mbytwl_hg40000gq/T/yarn--1696591343127-0.3534219795138642/node
  Yarn:
    version: 1.22.19
    path: /var/folders/5l/y80kyhh93kl22_mbytwl_hg40000gq/T/yarn--1696591343127-0.3534219795138642/yarn
  npm:
    version: 9.5.1
    path: ~/.volta/tools/image/node/18.16.1/bin/npm
  Watchman: Not Found
Managers:
  CocoaPods:
    version: 1.12.1
    path: /Users/louis.zawadzki/.rbenv/shims/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 23.0
      - iOS 17.0
      - macOS 14.0
      - tvOS 17.0
      - watchOS 10.0
  Android SDK: Not Found
IDEs:
  Android Studio: 2022.3 AI-223.8836.35.2231.10671973
  Xcode:
    version: 15.0/15A240d
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 11.0.16.1
    path: /Users/louis.zawadzki/.sdkman/candidates/java/current/bin/javac
  Ruby:
    version: 2.7.5
    path: /Users/louis.zawadzki/.rbenv/shims/ruby
npmPackages:
  "@react-native-community/cli": Not Found
  react:
    installed: 18.2.0
    wanted: 18.2.0
  react-native:
    installed: 0.73.0-rc.1
    wanted: 0.73.0-rc.1
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: false
iOS:
  hermesEnabled: true
  newArchEnabled: false

Issue and Reproduction Steps

• Create a new project with npx react-native@latest init MyApp --version 0.73.0-rc.1
• Run (cd ios && USE_FRAMEWORKS=dynamic pod install)
• Build the app using XCode 15

The app crashes immediately with the following error:

dyld[38734]: symbol not found in flat namespace '_jump_fcontext'

XCode screenshot:

[github-actions]

⚠️	Missing Reproducible Example
ℹ️	We could not detect a reproducible example in your issue report. Please provide either: If your bug is UI related: a Snack If your bug is build/update related: use our Reproducer Template. A reproducer needs to be in a GitHub repository under your username.

[cipolleschi]

Hi Luiz, can you try if this is happening also with Xcode 14? I fear that it is an Xcode 15 issue, unfortunately...

[cipolleschi]

Uhm... I just tried and it doesn't repro for me:

[louiszawadzki]

Hi,

I get the following different error in XCode 14.3.1 when building the app:

Ld /Users/louis.zawadzki/Library/Developer/Xcode/DerivedData/MyApp-foosftvymsuqgubztrolvgonqfox/Build/Intermediates.noindex/Pods.build/Release-iphonesimulator/libevent.build/Objects-normal/x86_64/Binary/libevent normal x86_64 (in target 'libevent' from project 'Pods')
    cd /Users/louis.zawadzki/go/src/github.com/DataDog/mobile/apps/MyApp/ios/Pods
    /Applications/Xcode-14.3.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -Xlinker -reproducible -target x86_64-apple-ios13.4-simulator -dynamiclib -isysroot /Applications/Xcode-14.3.1.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator16.4.sdk -L/Users/louis.zawadzki/Library/Developer/Xcode/DerivedData/MyApp-foosftvymsuqgubztrolvgonqfox/Build/Intermediates.noindex/EagerLinkingTBDs/Release-iphonesimulator -L/Users/louis.zawadzki/Library/Developer/Xcode/DerivedData/MyApp-foosftvymsuqgubztrolvgonqfox/Build/Products/Release-iphonesimulator/libevent -F/Users/louis.zawadzki/Library/Developer/Xcode/DerivedData/MyApp-foosftvymsuqgubztrolvgonqfox/Build/Intermediates.noindex/EagerLinkingTBDs/Release-iphonesimulator -F/Users/louis.zawadzki/Library/Developer/Xcode/DerivedData/MyApp-foosftvymsuqgubztrolvgonqfox/Build/Products/Release-iphonesimulator/libevent -filelist /Users/louis.zawadzki/Library/Developer/Xcode/DerivedData/MyApp-foosftvymsuqgubztrolvgonqfox/Build/Intermediates.noindex/Pods.build/Release-iphonesimulator/libevent.build/Objects-normal/x86_64/libevent.LinkFileList -install_name @rpath/libevent.framework/libevent -Xlinker -rpath -Xlinker @executable_path/Frameworks -Xlinker -rpath -Xlinker @loader_path/Frameworks -dead_strip -Xlinker -object_path_lto -Xlinker /Users/louis.zawadzki/Library/Developer/Xcode/DerivedData/MyApp-foosftvymsuqgubztrolvgonqfox/Build/Intermediates.noindex/Pods.build/Release-iphonesimulator/libevent.build/Objects-normal/x86_64/libevent_lto.o -Xlinker -objc_abi_version -Xlinker 2 -fobjc-arc -fobjc-link-runtime -Wl -ld_classic -framework Foundation -Xlinker -no_adhoc_codesign -compatibility_version 1 -current_version 1 -Xlinker -dependency_info -Xlinker /Users/louis.zawadzki/Library/Developer/Xcode/DerivedData/MyApp-foosftvymsuqgubztrolvgonqfox/Build/Intermediates.noindex/Pods.build/Release-iphonesimulator/libevent.build/Objects-normal/x86_64/libevent_dependency_info.dat -o /Users/louis.zawadzki/Library/Developer/Xcode/DerivedData/MyApp-foosftvymsuqgubztrolvgonqfox/Build/Intermediates.noindex/Pods.build/Release-iphonesimulator/libevent.build/Objects-normal/x86_64/Binary/libevent

ld: library not found for -ld_classic
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Following the hint from this issue I'm able to build by removing the -ld_classic flag in Pods and libevent targets (removing it in project.pbxproj wasn't enough), then the app works fine with XCode 14.3.1.

[cipolleschi]

yes, so... to run it in Xcode 14.3, you need to switch the build tool with xcode-select and rerun pod install to let cocoapods remove the flags for you. At that point, you don't have -ld_classic anymore and it work right away.

Can you try again with Xcode 15.1? My app works with Xcode 15.1...

[louiszawadzki]

Hi!
Sorry for the long delay, I just retried with rc3 and I don't reproduce the issue anymore, I'll close this issue :)

[mateioprea]

@cipolleschi i have the exact same problem.
Started a new project npx react-native@latest init AwesomeProjectTest, ran USE_FRAMEWORKS=dynamic NO_FLIPPER=1 pod install

and then i get this

React Native info:

info Fetching system and libraries information...
System:
  OS: macOS 14.2
  CPU: (10) arm64 Apple M1 Max
  Memory: 309.75 MB / 32.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 18.16.1
    path: ~/.nvm/versions/node/v18.16.1/bin/node
  Yarn:
    version: 1.22.17
    path: /opt/homebrew/bin/yarn
  npm:
    version: 9.5.1
    path: ~/.nvm/versions/node/v18.16.1/bin/npm
  Watchman: Not Found
Managers:
  CocoaPods:
    version: 1.14.3
    path: /Users/mateioprea/.rvm/gems/ruby-2.7.6/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 23.2
      - iOS 17.2
      - macOS 14.2
      - tvOS 17.2
      - watchOS 10.2
  Android SDK:
    API Levels:
      - "28"
      - "29"
      - "30"
      - "31"
      - "32"
      - "33"
      - "33"
    Build Tools:
      - 28.0.3
      - 29.0.2
      - 30.0.2
      - 30.0.3
      - 32.0.0
      - 33.0.0
      - 33.0.2
      - 34.0.0
    System Images:
      - android-31 | Google Play ARM 64 v8a
      - android-32 | Google APIs ARM 64 v8a
    Android NDK: Not Found
IDEs:
  Android Studio: Giraffe 2022.3.1 Patch 2 Giraffe 2022.3.1 Patch 2
  Xcode:
    version: 15.1/15C65
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 20.0.1
    path: /opt/homebrew/opt/openjdk/bin/javac
  Ruby:
    version: 2.7.6
    path: /Users/mateioprea/.rvm/rubies/ruby-2.7.6/bin/ruby
npmPackages:
  "@react-native-community/cli": Not Found
  react:
    installed: 18.2.0
    wanted: 18.2.0
  react-native:
    installed: 0.73.0
    wanted: 0.73.0
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: false
iOS:
  hermesEnabled: true
  newArchEnabled: false

[aybarska]

same on "react-native": "0.73.0",

[cipolleschi]

@mateioprea @aybarska

1. which version of Xcode are you using? (you can check it by running xcodebuild -v)
2. why are you not using bundler? (specifically, you should run USE_FRAMEWORKS=dynamic NO_FLIPPER=1 bundle exec pod install)
3. I just tried the following:

npx react-native@latest init AwesomeProjectTest --skip-install
cd AwesomeProjectTest
yarn install
cd ios
bundle install
USE_FRAMEWORKS=dynamic NO_FLIPPER=1 bundle exec pod install
open AwesomeProjectTest.xcworkspace

and them ⌘+R

and it works.

$ xcodebuild -version
Xcode 15.1
Build version 15C5028h

Can you try again?

[fontesrp]

@cipolleschi, I tried those steps, and I get the dyld[620]: symbol not found in flat namespace '_jump_fcontext' error only when I run in a physical device. If I target a simulator, everything works fine.

Here's the requested info, if it helps:

$ xcodebuild -version
Xcode 15.1
Build version 15C65

And the output of react-native info:

$ npx react-native@latest info
info Fetching system and libraries information...
System:
  OS: macOS 14.2
  CPU: (10) arm64 Apple M1 Max
  Memory: 2.28 GB / 32.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 20.10.0
    path: ~/.nvm/versions/node/v20.10.0/bin/node
  Yarn:
    version: 1.22.21
    path: /opt/homebrew/bin/yarn
  npm:
    version: 10.2.5
    path: ~/.nvm/versions/node/v20.10.0/bin/npm
  Watchman:
    version: 2023.12.04.00
    path: /opt/homebrew/bin/watchman
Managers:
  CocoaPods:
    version: 1.14.3
    path: /Users/rfontes/.rvm/gems/ruby-3.0.6/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 23.2
      - iOS 17.2
      - macOS 14.2
      - tvOS 17.2
      - watchOS 10.2
  Android SDK: Not Found
IDEs:
  Android Studio: 2023.1 AI-231.9392.1.2311.11076708
  Xcode:
    version: 15.1/15C65
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 11.0.21
    path: /usr/bin/javac
  Ruby:
    version: 3.0.6
    path: /Users/rfontes/.rvm/rubies/ruby-3.0.6/bin/ruby
npmPackages:
  "@react-native-community/cli": Not Found
  react:
    installed: 18.2.0
    wanted: 18.2.0
  react-native:
    installed: 0.73.1
    wanted: 0.73.1
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: false
iOS:
  hermesEnabled: true
  newArchEnabled: false

[cipolleschi]

I managed to reproduce it.
This is not a simple bug, as the stack trace reports that it happens in thread 1 at startup with little to no extra information.
I also tried in release mode and it still fails.
I'll need some more time to investigate. It could be an apple bug of the new linker too.

Have you tried with Xcode 15.2-beta already?