Console log: 'System.Runtime.Serialization.Xml.Tests' from job e3646bac-16db-454a-adfc-dacdcba5decf workitem 18ef7239-95c4-4d19-ade7-9a56a81b5955 (windows.10.amd64.open.rt) executed on machine a0025ZW running Windows-2016Server-10.0.14393-SP0 C:\h\w\C1CF0B45\w\A9DD092F\e>set _NT_SYMBOL_PATH=C:\h\w\C1CF0B45\p;C:\h\w\C1CF0B45\p\PDB;C:\h\w\C1CF0B45\p\shared\Microsoft.NETCore.App\11.0.0 C:\h\w\C1CF0B45\w\A9DD092F\e>C:\h\w\C1CF0B45\p\dotnet C:\h\w\C1CF0B45\p\sos\tools\net6.0\any\dotnet-sos.dll install --architecture x86 Installing SOS to C:\Users\runner\.dotnet\sos Installing over existing installation... Creating installation directory... Copying files from C:\h\w\C1CF0B45\p\sos\tools\net6.0\any\win-x86 Copying files from C:\h\w\C1CF0B45\p\sos\tools\net6.0\any\lib Execute '.load C:\Users\runner\.dotnet\sos\sos.dll' to load SOS in your Windows debugger. Cleaning up... SOS install succeeded C:\h\w\C1CF0B45\w\A9DD092F\e>taskkill.exe /f /im corerun.exe ERROR: The process "corerun.exe" not found. C:\h\w\C1CF0B45\w\A9DD092F\e>set __TestArchitecture=x86 C:\h\w\C1CF0B45\w\A9DD092F\e>call RunTests.cmd --runtime-path C:\h\w\C1CF0B45\p ========================= Begin custom configuration settings ============================== set __IsXUnitLogCheckerSupported=1 set XUNIT_HIDE_PASSING_OUTPUT_DIAGNOSTICS=1 ========================== End custom configuration settings =============================== ----- start Sat 05/30/2026 15:24:26.26 =============== To repro directly: ===================================================== pushd C:\h\w\C1CF0B45\w\A9DD092F\e\ "C:\h\w\C1CF0B45\p\dotnet.exe" exec --runtimeconfig System.Runtime.Serialization.Xml.Tests.runtimeconfig.json --depsfile System.Runtime.Serialization.Xml.Tests.deps.json xunit.console.dll System.Runtime.Serialization.Xml.Tests.dll -xml testResults.xml -nologo -nocolor -notrait category=IgnoreForCI -notrait category=OuterLoop -notrait category=failing popd =========================================================================================================== C:\h\w\C1CF0B45\w\A9DD092F\e>"C:\h\w\C1CF0B45\p\dotnet.exe" exec --runtimeconfig System.Runtime.Serialization.Xml.Tests.runtimeconfig.json --depsfile System.Runtime.Serialization.Xml.Tests.deps.json xunit.console.dll System.Runtime.Serialization.Xml.Tests.dll -xml testResults.xml -nologo -nocolor -notrait category=IgnoreForCI -notrait category=OuterLoop -notrait category=failing Discovering: System.Runtime.Serialization.Xml.Tests (method display = ClassAndMethod, method display options = None) Discovered: System.Runtime.Serialization.Xml.Tests (found 289 of 290 test cases) Starting: System.Runtime.Serialization.Xml.Tests (parallel test collections = on [4 threads], stop on fail = off) DataContractSerializerTests.DCS_MemoryStream_Deserialize_CompatibleWithFullFramework [FAIL] Assert.Equal() Failure: Values differ Expected: 5 Actual: 0 Stack Trace: /_/src/libraries/System.Runtime.Serialization.Xml/tests/DataContractSerializer.cs(4413,0): at DataContractSerializerTests.g__DeserializeObjectAndValidate|249_0(String input, Byte[] expectedData, Int32 expectedPosition, Boolean expectedExposable, Boolean expectedWritable) /_/src/libraries/System.Runtime.Serialization.Xml/tests/DataContractSerializer.cs(4358,0): at DataContractSerializerTests.DCS_MemoryStream_Deserialize_CompatibleWithFullFramework() at System.RuntimeMethodHandle.InvokeMethod(ObjectHandleOnStack target, Void** arguments, ObjectHandleOnStack sig, BOOL isConstructor, ObjectHandleOnStack result) at System.RuntimeMethodHandle.InvokeMethod(ObjectHandleOnStack target, Void** arguments, ObjectHandleOnStack sig, BOOL isConstructor, ObjectHandleOnStack result) /_/src/libraries/System.Private.CoreLib/src/System/Reflection/RuntimeMethodInfo.cs(134,0): at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) Finished: System.Runtime.Serialization.Xml.Tests === TEST EXECUTION SUMMARY === System.Runtime.Serialization.Xml.Tests Total: 354, Errors: 0, Failed: 1, Skipped: 0, Time: 18.571s ----- end Sat 05/30/2026 15:24:54.29 ----- exit code 1 ---------------------------------------------------------- C:\h\scripts\helix-scripts\azure\__init__.py:5: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81. import pkg_resources 2026-05-30T15:24:55.069Z INFO run.py managed_identity(151) __init__ ManagedIdentityCredential will use IMDS with client_id: 3423231b-6b9e-4177-8817-76276b647404 2026-05-30T15:24:55.070Z INFO run.py azure_utils(32) get_credential_and_access_token VMSSManagedIdentity VmssMIClientIdForUpload Auth type will be used 2026-05-30T15:24:55.070Z INFO run.py _universal(535) on_request Request URL: 'http://169.254.169.254/metadata/identity/oauth2/token?api-version=2018-02-01&resource=REDACTED&client_id=REDACTED' Request method: 'GET' Request headers: 'Metadata': 'REDACTED' 'User-Agent': 'azsdk-python-identity/1.25.3 Python/3.13.9 (Windows-2016Server-10.0.14393-SP0)' No body was attached to the request 2026-05-30T15:24:55.101Z INFO run.py _universal(581) on_response Response status: 200 Response headers: 'Content-Type': 'application/json; charset=utf-8' 'Server': 'IMDS/150.870.65.2020' 'x-ms-request-id': '2f2ef918-0bd8-4073-955e-ca8a5f349f7f' 'Date': 'Sat, 30 May 2026 15:24:55 GMT' 'Content-Length': '2473' 2026-05-30T15:24:55.102Z INFO run.py msal_managed_identity_client(165) _get_token_base ImdsCredential.get_token succeeded 2026-05-30T15:24:55.102Z INFO run.py decorators(24) wrapper ManagedIdentityCredential.get_token succeeded 2026-05-30T15:24:55.102Z INFO run.py azure_utils(64) get_credential_and_access_token Credentials are valid 2026-05-30T15:24:55.103Z INFO run.py msal_managed_identity_client(165) _get_token_base ImdsCredential.get_token_info succeeded 2026-05-30T15:24:55.103Z INFO run.py decorators(24) wrapper ManagedIdentityCredential.get_token_info succeeded 2026-05-30T15:24:55.523Z INFO run.py run(48) main Beginning reading of test results. 2026-05-30T15:24:55.523Z INFO run.py __init__(42) read_results Searching 'C:\h\w\C1CF0B45\w\A9DD092F\e' for test results files 2026-05-30T15:24:55.524Z INFO run.py __init__(48) read_results Found results file C:\h\w\C1CF0B45\w\A9DD092F\e\testResults.xml with format xunit 2026-05-30T15:24:55.529Z INFO run.py __init__(42) read_results Searching 'C:\h\w\C1CF0B45\w\A9DD092F\uploads' for test results files 2026-05-30T15:24:55.530Z INFO run.py packing_test_reporter(30) report_results Packing 354 test reports to 'C:\h\w\C1CF0B45\w\A9DD092F\e\__test_report.json' 2026-05-30T15:24:55.531Z INFO run.py packing_test_reporter(33) report_results Packed 96391 bytes ERROR: The process "corerun.exe" not found. gen-debug-dump-docs.py: Did not find dumps, skipping dump docs generation. ['System.Runtime.Serialization.Xml.Tests' END OF WORK ITEM LOG: Command exited with 0]