Crash on "Library not loaded: /usr/lib/swift/libswiftWebKit.dylib" when use XCode 16.3, iOS 18.4

I've also noticed that this specifically seems to occur only with the in:in: variant of this method. If you call the older pre-iOS 14+ method it does not crash, but it also lacks the ability to limit the scope like in:in: provides.

Hi all. +1 on this issue. Still present in Xcode 26.0 beta 1.

Seems like there's a simple fix to this: Add an environment variable for the missing fallback directory.

For example:

DYLD_FALLBACK_LIBRARY_PATH=/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/System/Cryptexes/OS/usr/lib/swift

The same as the above would apply to a different simulator combo.

I'm seeing this both in Xcode 16.3 and Xcode 26.

Without changing anything in the app, if I go back to Xcode 16.3 then everything works fine.

I've created a feedback (FB18097025) with Xcode and console output and some other information including a copy of the UIViewControllerRepresentable that uses the safari web view and therefore is likely the cause of the crash.

B the way, I don't know if this helps anyone, but if you set your project to be the same version as the simulator then it works.

EX:

Xcode 16.4 -> project iOS 18.4 and simulator iOS 18.4 Xcode 26 -> project iOS 26 and simulator 26

Mind you I have never seen this happen in a minor version so it still feels like something broke, but if you can set your version to match then that should fix it