Xcode under Rosetta fails to run unit tests without host application and UI tests

Originator:mail
Number:rdar://FB8990109 Date Originated:2021-02-04
Status:Open Resolved:No
Product:Xcode Product Version:Xcode Version 12.4 (12D4e)
Classification: Reproducible:Yes
 
Xcode fails to run unit tests without host application and UI tests when running with Rosetta enabled

# Please list the steps you took to reproduce the issue:
- Open "Get Info" menu for Xcode.app. Enable "Open using Rosetta"
- Create new Document App iOS project with name "Example"
- Change unit test target settings under General: Host Application = None
- Remove following line from the generated unit test "@testable import Example"
- Run all tests

# What did you expect to happen?
I expected all tests to complete successfully
What actually happened?
I received an error for each test target:

# Error for unit test target:

Details

Invalid device state
Domain: com.apple.CoreSimulator.SimError
Code: 405
--


System Information

macOS Version 11.0.1 (Build 20B29)
Xcode 12.4 (17801) (Build 12D4e)
Timestamp: 2021-02-04T15:56:27+03:00



# Error for ui test target:

Details

Could not attach to pid : “25305”
Domain: IDEDebugSessionErrorDomain
Code: 3
Failure Reason: attach failed ((os/kern) invalid argument)
User Info: {
    DVTRadarComponentKey = 855031;
    RawLLDBErrorMessage = "attach failed ((os/kern) invalid argument)";
}
--


System Information

macOS Version 11.0.1 (Build 20B29)
Xcode 12.4 (17801) (Build 12D4e)
Timestamp: 2021-02-04T15:56:25+03:00

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