Xcode 10.2 Failed to Run App on Simulator with iOS < 10

Question

I was playing around with Xcode 10.2 since the update and when I try to run my app on ANY simulator with iOS version less than 10, the simulator will not start and crash then show the error below:

dyld: Library not loaded: /usr/lib/libauto.dylib Referenced from: /System/Library/Frameworks/Foundation.framework/Versions/C/Foundation Reason: no suitable image found. Did find: /usr/lib/libauto.dylib: mach-o, but not built for iOS simulator

I tried to create another new project fresh without touching anything, set the deployment target to iOS 9 and run on iOS 9 simulator again, same error was shown.

UPDATE

It seems like this issue only occur when your code base contain swift. Created a new project with objective c code base did not crash the simulator. For swift yes.

SUMMARY

1. Xcode 10.2 contain swift code unable to run app on simulator with iOS 9
2. I have done all the cleaning and delete derive data and the issue still persist.

Anyone has any idea ?

FINAL UPDATE

Apple just release Xcode 10.2.1 and it is part of the known issue for simulator, please refer to the link below for the workaround/fix:

https://developer.apple.com/documentation/xcode_release_notes/xcode_10_2_1_release_notes

Appreciate @russbishop 's reply, answer accepted

Answer 1

This is a known bug affecting iOS 8.x and 9.x. You can work around it by creating /usr/lib/swift directories in the relevant simulator runtime root.

Downloaded simulator runtimes are located in /Library/Developer/CoreSimulator/Profiles/Runtimes.

For example, to fix the iOS 9.3 simulator:

sudo mkdir '/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 9.3.simruntime/Contents/Resources/RuntimeRoot/usr/lib/swift'