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Test discovery fails for certain test cases#8457
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Area: Our Own BuildProblems affecting the build or build infrastructure of the MSBuild repo itself.Priority:3Work that is nice to havebacklogtriaged
@vlada-shubina

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@vlada-shubina
vlada-shubina
opened on Feb 16, 2023

Some tests fail on test discovery:

[2/16/2023 11:15:47.262 AM] [Warning] [xUnit.net 00:00:13.28] Microsoft.Build.Engine.OM.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.OM.Definition.DefinitionEditing_Tests.RenameThrowsWhenItemElementSplittingIsDisabled'; falling back to single test case.
[2/16/2023 11:15:47.264 AM] [Warning] [xUnit.net 00:00:13.28] Microsoft.Build.Engine.OM.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.OM.Definition.DefinitionEditing_Tests.ChangeItemTypeThrowsWhenItemElementSplittingIsDisabled'; falling back to single test case.
[2/16/2023 11:15:47.269 AM] [Warning] [xUnit.net 00:00:13.28] Microsoft.Build.Engine.OM.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.OM.Definition.DefinitionEditing_Tests.RemoveItemThrowsWhenItemElementSplittingIsDisabled'; falling back to single test case.
[2/16/2023 11:15:47.273 AM] [Warning] [xUnit.net 00:00:13.28] Microsoft.Build.Engine.OM.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.OM.Definition.DefinitionEditing_Tests.RemoveItemsThrowsWhenItemElementSplittingIsDisabled'; falling back to single test case.
[2/16/2023 11:15:47.277 AM] [Warning] [xUnit.net 00:00:13.29] Microsoft.Build.Engine.OM.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.OM.Definition.DefinitionEditing_Tests.SetMetadataThrowsWhenItemElementSplittingIsDisabled'; falling back to single test case.
[2/16/2023 11:15:47.299 AM] [Warning] [xUnit.net 00:00:13.32] Microsoft.Build.Engine.OM.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.OM.Definition.ProjectItem_Tests.UpdateAndRemoveShouldWorkWithEscapedCharacters'; falling back to single test case.
[2/16/2023 11:15:47.346 AM] [Warning] [xUnit.net 00:00:13.36] Microsoft.Build.Engine.OM.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.OM.Definition.ProjectItemWithOptimizations_Tests.UpdateAndRemoveShouldWorkWithEscapedCharacters'; falling back to single test case.
[2/16/2023 11:15:47.356 AM] [Warning] [xUnit.net 00:00:13.37] Microsoft.Build.Engine.OM.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.OM.Definition.Project_Tests.GetItemProvenanceByProjectItem'; falling back to single test case.
[2/16/2023 11:15:47.360 AM] [Warning] [xUnit.net 00:00:13.38] Microsoft.Build.Engine.OM.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.OM.Definition.Project_Tests.GetItemProvenanceShouldWorkWithEscapedCharacters'; falling back to single test case.
[2/16/2023 11:15:47.387 AM]  [xUnit.net 00:00:05.18]   Discovering: Microsoft.NET.StringTools.net35.UnitTests
[2/16/2023 11:15:47.398 AM] [Warning] [xUnit.net 00:00:13.42] Microsoft.Build.Engine.OM.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.OM.Construction.ConstructionEditing_Tests.InsertMetadataElementAfterSiblings'; falling back to single test case.
[2/16/2023 11:15:47.401 AM] [Warning] [xUnit.net 00:00:13.42] Microsoft.Build.Engine.OM.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.OM.Construction.ConstructionEditing_Tests.InsertMetadataElementBeforeSiblings'; falling back to single test case.
[2/16/2023 11:15:47.472 AM] [Warning] [xUnit.net 00:00:05.13] Microsoft.NET.StringTools.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.NET.StringTools.Tests.SpanBasedStringBuilder_Tests.LengthReturnsLength'; falling back to single test case.
[2/16/2023 11:15:47.478 AM] [Warning] [xUnit.net 00:00:05.14] Microsoft.NET.StringTools.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.NET.StringTools.Tests.SpanBasedStringBuilder_Tests.EnumeratorEnumeratesCharacters'; falling back to single test case.
[2/16/2023 11:15:47.481 AM] [Warning] [xUnit.net 00:00:05.14] Microsoft.NET.StringTools.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.NET.StringTools.Tests.SpanBasedStringBuilder_Tests.EqualsReturnsExpectedValue'; falling back to single test case.
[2/16/2023 11:15:47.516 AM] [Warning] [xUnit.net 00:00:05.18] Microsoft.NET.StringTools.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.NET.StringTools.Tests.SpanBasedStringBuilder_Tests.AppendAppendsString'; falling back to single test case.
[2/16/2023 11:15:47.522 AM] [Warning] [xUnit.net 00:00:05.18] Microsoft.NET.StringTools.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.NET.StringTools.Tests.SpanBasedStringBuilder_Tests.AppendAppendsSubstring'; falling back to single test case.
[2/16/2023 11:15:47.531 AM] [Warning] [xUnit.net 00:00:05.19] Microsoft.NET.StringTools.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.NET.StringTools.Tests.SpanBasedStringBuilder_Tests.TrimStartRemovesLeadingWhiteSpace'; falling back to single test case.
[2/16/2023 11:15:47.536 AM] [Warning] [xUnit.net 00:00:05.19] Microsoft.NET.StringTools.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.NET.StringTools.Tests.SpanBasedStringBuilder_Tests.TrimEndRemovesTrailingWhiteSpace'; falling back to single test case.
[2/16/2023 11:15:47.538 AM] [Warning] [xUnit.net 00:00:05.19] Microsoft.NET.StringTools.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.NET.StringTools.Tests.SpanBasedStringBuilder_Tests.TrimRemovesLeadingAndTrailingWhiteSpace'; falling back to single test case.
[2/16/2023 11:15:47.541 AM] [Warning] [xUnit.net 00:00:05.19] Microsoft.NET.StringTools.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.NET.StringTools.Tests.SpanBasedStringBuilder_Tests.ClearRemovesAllCharacters'; falling back to single test case.
[2/16/2023 11:15:48.561 AM] [Warning] [xUnit.net 00:00:14.69] Microsoft.Build.CommandLine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.CommandLineSwitchesTests.ProcessGraphBuildSwitch'; falling back to single test case.
[2/16/2023 11:15:49.551 AM] [Warning] [xUnit.net 00:00:15.50] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Graph.UnitTests.GraphLoadedFromSolutionTests.SolutionsCanInjectEdgesIntoTheProjectGraph'; falling back to single test case.
[2/16/2023 11:15:49.584 AM] [Warning] [xUnit.net 00:00:15.54] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Graph.UnitTests.IsolateProjectsTests.UndeclaredReferenceEnforcementShouldNormalizeFilePaths'; falling back to single test case.
[2/16/2023 11:15:49.595 AM] [Warning] [xUnit.net 00:00:15.55] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Graph.UnitTests.ProjectGraphTests.TopologicalSortShouldTopologicallySort'; falling back to single test case.
[2/16/2023 11:15:49.598 AM] [Warning] [xUnit.net 00:00:15.55] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Graph.UnitTests.ProjectGraphTests.DotNotationShouldRepresentGraph'; falling back to single test case.
[2/16/2023 11:15:49.604 AM] [Warning] [xUnit.net 00:00:15.56] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Graph.UnitTests.ProjectGraphTests.AllNodesShouldHaveGraphBuildGlobalProperty'; falling back to single test case.
[2/16/2023 11:15:49.609 AM] [Warning] [xUnit.net 00:00:15.56] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Graph.UnitTests.ProjectGraphTests.GraphShouldSupportTransitiveReferences'; falling back to single test case.
[2/16/2023 11:15:49.616 AM] [Warning] [xUnit.net 00:00:15.57] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Graph.UnitTests.ProjectGraphTests.TransitiveReferencesAreDefinedPerProject'; falling back to single test case.
[2/16/2023 11:15:49.630 AM] [Warning] [xUnit.net 00:00:15.58] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Graph.UnitTests.ResultCacheBasedBuilds_Tests.BuildProjectGraphUsingCaches'; falling back to single test case.
[2/16/2023 11:15:49.811 AM] [Warning] [xUnit.net 00:00:15.74] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Engine.UnitTests.ProjectCache.ProjectCacheTests.ProjectCacheByBuildParametersAndGraphBuildWorks'; falling back to single test case.
[2/16/2023 11:15:49.816 AM] [Warning] [xUnit.net 00:00:15.77] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Engine.UnitTests.ProjectCache.ProjectCacheTests.ProjectCacheByBuildParametersAndBottomUpBuildWorks'; falling back to single test case.
[2/16/2023 11:15:49.818 AM] [Warning] [xUnit.net 00:00:15.77] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Engine.UnitTests.ProjectCache.ProjectCacheTests.ProjectCacheByVsScenarioWorks'; falling back to single test case.
[2/16/2023 11:15:49.824 AM] [Warning] [xUnit.net 00:00:15.78] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Engine.UnitTests.ProjectCache.ProjectCacheTests.CacheShouldNotGetQueriedForNestedBuildRequests'; falling back to single test case.
[2/16/2023 11:15:49.835 AM] [Warning] [xUnit.net 00:00:15.78] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Engine.UnitTests.Instance.ProjectItemGroupTaskItemInstance_Internal_Tests.ProjectItemGroupTaskItemInstanceCanSerializeViaTranslator'; falling back to single test case.
[2/16/2023 11:15:49.838 AM] [Warning] [xUnit.net 00:00:15.79] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Engine.UnitTests.Instance.ProjectTargetInstance_Internal_Tests.ProjectTargetInstanceCanSerializeViaTranslator'; falling back to single test case.
[2/16/2023 11:15:49.842 AM] [Warning] [xUnit.net 00:00:15.80] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Engine.UnitTests.Instance.ProjectTaskInstance_Internal_Tests.ProjectTaskInstanceCanSerializeViaTranslator'; falling back to single test case.
[2/16/2023 11:15:49.863 AM] [Warning] [xUnit.net 00:00:15.82] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Engine.UnitTests.Globbing.CompositeGlobTests.CompositeMatching'; falling back to single test case.
[2/16/2023 11:15:50.011 AM] [Warning] [xUnit.net 00:00:15.96] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.ProjectEvaluationFinishedEventArgs_Tests.ProfilerResultRoundTrip'; falling back to single test case.
[2/16/2023 11:15:50.066 AM] [Warning] [xUnit.net 00:00:16.02] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.FileMatcherTest.GetFilesComplexGlobbingMatching'; falling back to single test case.
[2/16/2023 11:15:50.227 AM] [Warning] [xUnit.net 00:00:16.18] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.Evaluation.ItemEvaluation_Tests.ItemOperationsShouldExpandIndirectItemReferences'; falling back to single test case.
[2/16/2023 11:15:50.268 AM] [Warning] [xUnit.net 00:00:16.22] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.Evaluation.SimpleVersion_Tests.CompareTo_ReturnsExpected'; falling back to single test case.
[2/16/2023 11:15:50.288 AM] [Warning] [xUnit.net 00:00:16.24] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.Evaluation.SimpleVersion_Tests.ComparisonOperators_ReturnExpected'; falling back to single test case.
[2/16/2023 11:15:50.295 AM] [Warning] [xUnit.net 00:00:16.25] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.Evaluation.SimpleVersion_Tests.Equals_Other_ReturnsExpected'; falling back to single test case.
[2/16/2023 11:15:50.299 AM] [Warning] [xUnit.net 00:00:16.25] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.Evaluation.SimpleVersion_Tests.Parse_ValidInput_ReturnsExpected'; falling back to single test case.
[2/16/2023 11:15:50.314 AM] [Warning] [xUnit.net 00:00:16.27] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.Evaluation.SimpleVersion_Tests.ToString_Invoke_ReturnsExpected'; falling back to single test case.
[2/16/2023 11:15:50.450 AM] [Warning] [xUnit.net 00:00:16.40] Microsoft.Build.Engine.UnitTests: Non-serializable data ('Microsoft.Build.UnitTests.OM.Instance.ProjectInstance_Internal_Tests+ProjectInstanceFactory[]') found for 'Microsoft.Build.UnitTests.OM.Instance.ProjectInstance_Internal_Tests.ProjectInstanceHasEvaluationId'; falling back to single test case.
[2/16/2023 11:15:50.463 AM] [Warning] [xUnit.net 00:00:16.42] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.OM.Construction.ProjectSdkImplicitImport_Tests.SdkPropertiesAreExpanded'; falling back to single test case.
[2/16/2023 11:15:50.515 AM] [Warning] [xUnit.net 00:00:16.47] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.BackEnd.CacheSerialization_Tests.OnlySerializeCacheEntryWithSmallestConfigId'; falling back to single test case.
[2/16/2023 11:15:50.518 AM] [Warning] [xUnit.net 00:00:16.47] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.BackEnd.CacheSerialization_Tests.OnlySerializeResultsForSpecifiedTargets'; falling back to single test case.
[2/16/2023 11:15:50.520 AM] [Warning] [xUnit.net 00:00:16.47] Microsoft.Build.Engine.UnitTests: Non-serializable data ('Microsoft.Build.BackEnd.ConfigCache[]') found for 'Microsoft.Build.UnitTests.BackEnd.ConfigCache_Tests.ConfigCacheShouldBeTranslatable'; falling back to single test case.
[2/16/2023 11:15:50.529 AM] [Warning] [xUnit.net 00:00:09.01] Microsoft.Build.CommandLine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.CommandLineSwitchesTests.ProcessGraphBuildSwitch'; falling back to single test case.
[2/16/2023 11:15:50.532 AM] [Warning] [xUnit.net 00:00:16.48] Microsoft.Build.Engine.UnitTests: Non-serializable data ('Microsoft.Build.BackEnd.ConfigCache[]') found for 'Microsoft.Build.UnitTests.BackEnd.ConfigCache_Tests.GetSmallestConfigIdThrows'; falling back to single test case.
[2/16/2023 11:15:50.535 AM] [Warning] [xUnit.net 00:00:16.48] Microsoft.Build.Engine.UnitTests: Non-serializable data ('Microsoft.Build.BackEnd.ConfigCache[]') found for 'Microsoft.Build.UnitTests.BackEnd.ConfigCache_Tests.HappyGetSmallestConfigId'; falling back to single test case.
[2/16/2023 11:15:50.537 AM] [Warning] [xUnit.net 00:00:16.49] Microsoft.Build.Engine.UnitTests: Non-serializable data ('Microsoft.Build.BackEnd.ResultsCache[]') found for 'Microsoft.Build.UnitTests.BackEnd.ResultsCache_Tests.TestResultsCacheTranslation'; falling back to single test case.
[2/16/2023 11:15:50.559 AM] [Warning] [xUnit.net 00:00:16.51] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.BackEnd.TaskRegistry_Tests.TaskRegistryCanSerializeViaTranslator'; falling back to single test case.
[2/16/2023 11:15:50.643 AM] [Warning] [xUnit.net 00:00:08.05] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Graph.UnitTests.GraphLoadedFromSolutionTests.SolutionsCanInjectEdgesIntoTheProjectGraph'; falling back to single test case.
[2/16/2023 11:15:50.656 AM] [Warning] [xUnit.net 00:00:08.07] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Graph.UnitTests.IsolateProjectsTests.UndeclaredReferenceEnforcementShouldNormalizeFilePaths'; falling back to single test case.
[2/16/2023 11:15:50.664 AM] [Warning] [xUnit.net 00:00:08.08] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Graph.UnitTests.ProjectGraphTests.TopologicalSortShouldTopologicallySort'; falling back to single test case.
[2/16/2023 11:15:50.685 AM] [Warning] [xUnit.net 00:00:08.08] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Graph.UnitTests.ProjectGraphTests.DotNotationShouldRepresentGraph'; falling back to single test case.
[2/16/2023 11:15:50.689 AM] [Warning] [xUnit.net 00:00:08.09] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Graph.UnitTests.ProjectGraphTests.AllNodesShouldHaveGraphBuildGlobalProperty'; falling back to single test case.
[2/16/2023 11:15:50.692 AM] [Warning] [xUnit.net 00:00:08.09] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Graph.UnitTests.ProjectGraphTests.GraphShouldSupportTransitiveReferences'; falling back to single test case.
[2/16/2023 11:15:50.695 AM] [Warning] [xUnit.net 00:00:08.09] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Graph.UnitTests.ProjectGraphTests.TransitiveReferencesAreDefinedPerProject'; falling back to single test case.
[2/16/2023 11:15:50.698 AM] [Warning] [xUnit.net 00:00:08.11] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Graph.UnitTests.ResultCacheBasedBuilds_Tests.BuildProjectGraphUsingCaches'; falling back to single test case.
[2/16/2023 11:15:51.090 AM] [Warning] [xUnit.net 00:00:08.50] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Engine.UnitTests.ProjectCache.ProjectCacheTests.ProjectCacheByBuildParametersAndGraphBuildWorks'; falling back to single test case.
[2/16/2023 11:15:51.095 AM] [Warning] [xUnit.net 00:00:08.51] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Engine.UnitTests.ProjectCache.ProjectCacheTests.ProjectCacheByBuildParametersAndBottomUpBuildWorks'; falling back to single test case.
[2/16/2023 11:15:51.097 AM] [Warning] [xUnit.net 00:00:08.51] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Engine.UnitTests.ProjectCache.ProjectCacheTests.ProjectCacheByVsScenarioWorks'; falling back to single test case.
[2/16/2023 11:15:51.103 AM] [Warning] [xUnit.net 00:00:08.51] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Engine.UnitTests.ProjectCache.ProjectCacheTests.CacheShouldNotGetQueriedForNestedBuildRequests'; falling back to single test case.
[2/16/2023 11:15:51.257 AM] [Warning] [xUnit.net 00:00:08.80] Microsoft.Build.Engine.OM.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.OM.Definition.DefinitionEditing_Tests.RenameThrowsWhenItemElementSplittingIsDisabled'; falling back to single test case.
[2/16/2023 11:15:51.279 AM] [Warning] [xUnit.net 00:00:08.80] Microsoft.Build.Engine.OM.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.OM.Definition.DefinitionEditing_Tests.ChangeItemTypeThrowsWhenItemElementSplittingIsDisabled'; falling back to single test case.
[2/16/2023 11:15:51.281 AM] [Warning] [xUnit.net 00:00:08.80] Microsoft.Build.Engine.OM.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.OM.Definition.DefinitionEditing_Tests.RemoveItemThrowsWhenItemElementSplittingIsDisabled'; falling back to single test case.
[2/16/2023 11:15:51.284 AM]  [xUnit.net 00:00:00.00] xUnit.net VSTest Adapter v2.4.3+1b45f5407b (64-bit .NET 7.0.3)
[2/16/2023 11:15:51.287 AM] [Warning] [xUnit.net 00:00:08.80] Microsoft.Build.Engine.OM.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.OM.Definition.DefinitionEditing_Tests.RemoveItemsThrowsWhenItemElementSplittingIsDisabled'; falling back to single test case.
[2/16/2023 11:15:51.514 AM] [Warning] [xUnit.net 00:00:08.71] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Engine.UnitTests.Instance.ProjectItemGroupTaskItemInstance_Internal_Tests.ProjectItemGroupTaskItemInstanceCanSerializeViaTranslator'; falling back to single test case.
[2/16/2023 11:15:51.517 AM] [Warning] [xUnit.net 00:00:08.71] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Engine.UnitTests.Instance.ProjectTargetInstance_Internal_Tests.ProjectTargetInstanceCanSerializeViaTranslator'; falling back to single test case.
[2/16/2023 11:15:51.519 AM] [Warning] [xUnit.net 00:00:08.72] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Engine.UnitTests.Instance.ProjectTaskInstance_Internal_Tests.ProjectTaskInstanceCanSerializeViaTranslator'; falling back to single test case.
[2/16/2023 11:15:51.522 AM] [Warning] [xUnit.net 00:00:08.81] Microsoft.Build.Engine.OM.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.OM.Definition.DefinitionEditing_Tests.SetMetadataThrowsWhenItemElementSplittingIsDisabled'; falling back to single test case.
[2/16/2023 11:15:51.525 AM] [Warning] [xUnit.net 00:00:08.82] Microsoft.Build.Engine.OM.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.OM.Definition.ProjectItem_Tests.UpdateAndRemoveShouldWorkWithEscapedCharacters'; falling back to single test case.
[2/16/2023 11:15:51.527 AM] [Warning] [xUnit.net 00:00:08.88] Microsoft.Build.Engine.OM.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.OM.Definition.ProjectItemWithOptimizations_Tests.UpdateAndRemoveShouldWorkWithEscapedCharacters'; falling back to single test case.
[2/16/2023 11:15:51.561 AM]  [xUnit.net 00:00:10.05]   Discovered:  Microsoft.Build.CommandLine.UnitTests (found 270 test cases)
[2/16/2023 11:15:51.774 AM]  [xUnit.net 00:00:08.78]   Discovered:  Microsoft.Build.Utilities.UnitTests (found 505 test cases)
[2/16/2023 11:15:51.776 AM]  [xUnit.net 00:00:08.18]   Discovering: Microsoft.Build.Tasks.UnitTests (app domain = on [no shadow copy], method display = ClassAndMethod, method display options = None)
[2/16/2023 11:15:52.071 AM] [Warning] [xUnit.net 00:00:09.59] Microsoft.Build.Engine.OM.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.OM.Definition.Project_Tests.GetItemProvenanceByProjectItem'; falling back to single test case.
[2/16/2023 11:15:52.074 AM] [Warning] [xUnit.net 00:00:09.60] Microsoft.Build.Engine.OM.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.OM.Definition.Project_Tests.GetItemProvenanceShouldWorkWithEscapedCharacters'; falling back to single test case.
[2/16/2023 11:15:52.144 AM] [Warning] [xUnit.net 00:00:09.62] Microsoft.Build.Engine.OM.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.OM.Construction.ConstructionEditing_Tests.InsertMetadataElementAfterSiblings'; falling back to single test case.
[2/16/2023 11:15:52.156 AM] [Warning] [xUnit.net 00:00:09.63] Microsoft.Build.Engine.OM.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.OM.Construction.ConstructionEditing_Tests.InsertMetadataElementBeforeSiblings'; falling back to single test case.
[2/16/2023 11:15:53.703 AM] [Warning] [xUnit.net 00:00:11.07] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.Engine.UnitTests.Globbing.CompositeGlobTests.CompositeMatching'; falling back to single test case.
[2/16/2023 11:15:53.923 AM]  [xUnit.net 00:00:11.06]   Discovered:  Microsoft.Build.Engine.OM.UnitTests (found 1595 test cases)
[2/16/2023 11:15:53.940 AM] [Warning] [xUnit.net 00:00:11.29] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.ProjectEvaluationFinishedEventArgs_Tests.ProfilerResultRoundTrip'; falling back to single test case.
[2/16/2023 11:15:55.018 AM] [Warning] [xUnit.net 00:00:11.49] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.FileMatcherTest.GetFilesComplexGlobbingMatching'; falling back to single test case.
[2/16/2023 11:15:55.023 AM]  [xUnit.net 00:00:00.00] xUnit.net VSTest Adapter v2.4.3+1b45f5407b (64-bit .NET 7.0.3)
[2/16/2023 11:15:55.025 AM]  [xUnit.net 00:00:00.00] xUnit.net VSTest Adapter v2.4.3+1b45f5407b (64-bit .NET 7.0.3)
[2/16/2023 11:15:55.031 AM] [Warning] [xUnit.net 00:00:11.68] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.Evaluation.ItemEvaluation_Tests.ItemOperationsShouldExpandIndirectItemReferences'; falling back to single test case.
[2/16/2023 11:15:55.033 AM] [Warning] [xUnit.net 00:00:10.81] Microsoft.Build.Tasks.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.ResolveAssemblyReference_Tests.TaskTranslatorHelpers.ValidFrameworkName'; falling back to single test case.
[2/16/2023 11:15:55.142 AM] [Warning] [xUnit.net 00:00:11.72] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.Evaluation.SimpleVersion_Tests.CompareTo_ReturnsExpected'; falling back to single test case.
[2/16/2023 11:15:55.144 AM] [Warning] [xUnit.net 00:00:11.72] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.Evaluation.SimpleVersion_Tests.ComparisonOperators_ReturnExpected'; falling back to single test case.
[2/16/2023 11:15:55.147 AM] [Warning] [xUnit.net 00:00:11.74] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.Evaluation.SimpleVersion_Tests.Equals_Other_ReturnsExpected'; falling back to single test case.
[2/16/2023 11:15:55.150 AM] [Warning] [xUnit.net 00:00:11.75] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.Evaluation.SimpleVersion_Tests.Parse_ValidInput_ReturnsExpected'; falling back to single test case.
[2/16/2023 11:15:55.153 AM] [Warning] [xUnit.net 00:00:11.77] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.Evaluation.SimpleVersion_Tests.ToString_Invoke_ReturnsExpected'; falling back to single test case.
[2/16/2023 11:15:55.156 AM] [Warning] [xUnit.net 00:00:11.89] Microsoft.Build.Engine.UnitTests: Non-serializable data ('Microsoft.Build.UnitTests.OM.Instance.ProjectInstance_Internal_Tests+ProjectInstanceFactory[]') found for 'Microsoft.Build.UnitTests.OM.Instance.ProjectInstance_Internal_Tests.ProjectInstanceHasEvaluationId'; falling back to single test case.
[2/16/2023 11:15:55.159 AM] [Warning] [xUnit.net 00:00:11.91] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.OM.Construction.ProjectSdkImplicitImport_Tests.SdkPropertiesAreExpanded'; falling back to single test case.
[2/16/2023 11:15:55.161 AM] [Warning] [xUnit.net 00:00:12.00] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.BackEnd.CacheSerialization_Tests.OnlySerializeCacheEntryWithSmallestConfigId'; falling back to single test case.
[2/16/2023 11:15:55.164 AM] [Warning] [xUnit.net 00:00:12.00] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.BackEnd.CacheSerialization_Tests.OnlySerializeResultsForSpecifiedTargets'; falling back to single test case.
[2/16/2023 11:15:55.167 AM] [Warning] [xUnit.net 00:00:12.01] Microsoft.Build.Engine.UnitTests: Non-serializable data ('Microsoft.Build.BackEnd.ConfigCache[]') found for 'Microsoft.Build.UnitTests.BackEnd.ConfigCache_Tests.ConfigCacheShouldBeTranslatable'; falling back to single test case.
[2/16/2023 11:15:55.173 AM] [Warning] [xUnit.net 00:00:12.01] Microsoft.Build.Engine.UnitTests: Non-serializable data ('Microsoft.Build.BackEnd.ConfigCache[]') found for 'Microsoft.Build.UnitTests.BackEnd.ConfigCache_Tests.GetSmallestConfigIdThrows'; falling back to single test case.
[2/16/2023 11:15:55.178 AM] [Warning] [xUnit.net 00:00:12.02] Microsoft.Build.Engine.UnitTests: Non-serializable data ('Microsoft.Build.BackEnd.ConfigCache[]') found for 'Microsoft.Build.UnitTests.BackEnd.ConfigCache_Tests.HappyGetSmallestConfigId'; falling back to single test case.
[2/16/2023 11:15:55.187 AM] [Warning] [xUnit.net 00:00:12.07] Microsoft.Build.Engine.UnitTests: Non-serializable data ('Microsoft.Build.BackEnd.ResultsCache[]') found for 'Microsoft.Build.UnitTests.BackEnd.ResultsCache_Tests.TestResultsCacheTranslation'; falling back to single test case.
[2/16/2023 11:15:55.189 AM] [Warning] [xUnit.net 00:00:12.14] Microsoft.Build.Engine.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.Build.UnitTests.BackEnd.TaskRegistry_Tests.TaskRegistryCanSerializeViaTranslator'; falling back to single test case.
[2/16/2023 11:15:57.647 AM] [Warning] [xUnit.net 00:00:03.41] Microsoft.NET.StringTools.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.NET.StringTools.Tests.SpanBasedStringBuilder_Tests.LengthReturnsLength'; falling back to single test case.
[2/16/2023 11:15:57.649 AM] [Warning] [xUnit.net 00:00:03.42] Microsoft.NET.StringTools.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.NET.StringTools.Tests.SpanBasedStringBuilder_Tests.EnumeratorEnumeratesCharacters'; falling back to single test case.
[2/16/2023 11:15:57.652 AM] [Warning] [xUnit.net 00:00:03.42] Microsoft.NET.StringTools.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.NET.StringTools.Tests.SpanBasedStringBuilder_Tests.EqualsReturnsExpectedValue'; falling back to single test case.
[2/16/2023 11:15:57.654 AM] [Warning] [xUnit.net 00:00:03.43] Microsoft.NET.StringTools.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.NET.StringTools.Tests.SpanBasedStringBuilder_Tests.AppendAppendsString'; falling back to single test case.
[2/16/2023 11:15:57.657 AM] [Warning] [xUnit.net 00:00:03.43] Microsoft.NET.StringTools.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.NET.StringTools.Tests.SpanBasedStringBuilder_Tests.AppendAppendsSubstring'; falling back to single test case.
[2/16/2023 11:15:57.659 AM] [Warning] [xUnit.net 00:00:03.43] Microsoft.NET.StringTools.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.NET.StringTools.Tests.SpanBasedStringBuilder_Tests.TrimStartRemovesLeadingWhiteSpace'; falling back to single test case.
[2/16/2023 11:15:57.662 AM] [Warning] [xUnit.net 00:00:03.43] Microsoft.NET.StringTools.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.NET.StringTools.Tests.SpanBasedStringBuilder_Tests.TrimEndRemovesTrailingWhiteSpace'; falling back to single test case.
[2/16/2023 11:15:57.665 AM] [Warning] [xUnit.net 00:00:03.44] Microsoft.NET.StringTools.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.NET.StringTools.Tests.SpanBasedStringBuilder_Tests.TrimRemovesLeadingAndTrailingWhiteSpace'; falling back to single test case.
[2/16/2023 11:15:57.667 AM] [Warning] [xUnit.net 00:00:03.44] Microsoft.NET.StringTools.UnitTests: Non-serializable data ('System.Object[]') found for 'Microsoft.NET.StringTools.Tests.SpanBasedStringBuilder_Tests.ClearRemovesAllCharacters'; falling back to single test case.

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    Area: Our Own BuildProblems affecting the build or build infrastructure of the MSBuild repo itself.Priority:3Work that is nice to havebacklogtriaged

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