I was migrating from Xcode 14 -> 15, and noticed that my code was failing with dyld[46534]: Symbol not found: _OBJC_CLASS_$_NSError
I was able to debug the problem to some old objective c code, as documented in this thread: https://github.com/RonRadtke/react-native-blob-util/issues/273
The error seems to stem from this particular try catch block
@try {
// Some code
}
@catch(NSError *er) {
// handle error
}
When I convert the code to catch an NSException instead, the runtime error goes away. Understandably, according to the apple docs, it should be throwing an NSException in the first place, but the documents do say
Important: Although you can throw and catch objects other than NSException objects, the Cocoa frameworks themselves might only catch NSException objects for some conditions. So if you throw other types of objects, the Cocoa handlers for that exception might not run, with undefined results. (Conversely, non-NSException objects that you throw could be caught by some Cocoa handlers.) For these reasons, it is recommended that you throw NSException objects only, while being prepared to catch exception objects of all types.
So it seems like this should not have produced a runtime error. I wanted to flag this in case the underlying code behind the @try @catch changed unintentionally.