Turbo Modules issue with 0.79

[jerryseigle]

TurboModule Causes Crash When Launching from Xcode with Metro Already Running

Description

I created a TurboModule using React Native 0.79 and encountered a strange issue when launching the app via Xcode.

✅ What Works

• After adding my TurboModule, I can run the app using:

  npx react-native run-ios

  Metro starts automatically and the app runs without issues.

• Alternatively, I can start Metro first:

  npx react-native start

  Then run the app using:

  npx react-native run-ios

  Again, everything works fine.

❌ What Fails

If I:

1. Start Metro manually:

   npx react-native start

2. Open the .xcworkspace in Xcode
3. Press the Run (Play) button to launch the app

The app crashes immediately.

🔎 Additional Info

• If I remove the TurboModule and repeat the same steps, the app launches from Xcode without any issues.
• The crash only occurs when the TurboModule is present and the app is launched from Xcode (with Metro already running).

🧵 Summary

TurboModule works fine when launching the app via CLI, but causes a crash when launching from Xcode while Metro is running.

[cortinico]

• The crash only occurs when the TurboModule is present and the app is launched from Xcode (with Metro already running).

What is the stacktrace?

[jerryseigle]

Well seem as of 0.79.1 I am no longer getting this error. I was getting the error with 0.79rc. If possible could this remain open for 2 days I can report back as I have not add my implementation to test and make sure this issue does not come back

[jerryseigle]

So I am still have same issue. Again this only happens when trying to run the project directly from Xcode play button but I do not have this problem when running from the terminal

[jerryseigle]

If needed I could make a short video that would show this issue.