fail: Application has finished but XHarness failed to determine its exit code!

[matouskozak]

Sometimes, XHarness fails to determine exit code from test run on Apple devices (investigate if happens on other platforms as well) and fails with:

fail: Application has finished but XHarness failed to determine its exit code!
...
XHarness exit code: 82 (RETURN_CODE_NOT_SET)

Happened for example in build https://dev.azure.com/dnceng-public/public/_build/results?buildId=642460&view=logs&j=28c2a171-0c43-5d2a-7ef1-2d2cea8331ba&t=3df1997a-11aa-5246-c452-91536bb3018b for tvos-arm64 Release AllSubsets_Mono_RuntimeTests job (helix log).

[kotlarmilos]

Is this duplicate of #1287? If yes, we can close this issue then.

[matouskozak]

Is this duplicate of #1287? If yes, we can close this issue then.

Not 100% confirmed that the root cause is the same. The #1287 is XCode 15.4 specific while this issue already happened on older XCode versions.