OS Debug Mode Crashes with Unity Integration - "Unable to flip between RX and RW memory protection"

[ahmeddarafat]

When using flutter_unity_widget_2 (or similar Unity integration plugins) on iOS physical devices, the app crashes immediately in debug mode with the following error:

Unable to flip between RX and RW memory protection on pages
Thread 1: signal SIGABRT

Steps to Reproduce

1. Create a Flutter project with Unity integration
2. Export Unity project to UnityLibrary
3. Configure the plugin as per documentation
4. Run flutter run (debug mode)
5. App crashes with SIGABRT (white screen appear)

[timbotimbo]

Hey sorry for the very late response, apparently I don't automatically get issue notifications for my own repo.

Which Flutter and Xcode version are/were you using?

In general debug crashes like this often come from specific Xcode settings.

For example the 'Thread Performance Checker' is known to instantly crash the widget and show a white screen.

I copied the screenshot below from an older comment, but it should show you where to find this setting.

• Product -> Scheme -> Edit scheme -> Diagnostics

I would try unchecking settings in the diagnostics tab (and possibly options) to see if they might cause the issue.

You can also see if running directly from Xcode makes a difference compared to Flutter run.