Running any XCTest with XCode 11 Grand Master Seed 2 and iOS 13 simulators throws the below warning message:
xcodebuild[95489:2342933] [MT] DVTAssertions: Warning in /Library/Caches/com.apple.xbs/Sources/DVTiOSFrameworks/DVTiOSFrameworks-14802/IDEiOSSupportCore/DVTiPhoneSimulator.m:1890
Details: [DVTiPhoneSimulator -primaryInstrumentsServer was called from the main thread
Object: <DVTiPhoneSimulator: 0x7f7f717c9bc0>
Method: -primaryInstrumentsServerWithError:
Thread: <NSThread: 0x7f7f71414dd0>{number = 1, name = main}
Please file a bug at https://feedbackassistant.apple.com with this warning message and any useful information you can provide.
The tests keep crashing after running for some time. I am not sure if this is the root cause behind this. This issue happens a lot when running tests in parallel using xcodebuild build-for-testing & xcodebuild test-without-building. If you need any more info on this, then please let me know.