Unhandled exception. System.TypeLoadException: Could not load type 'System.Tests.ValueTypeTests+StructWithMutualGenericFieldA' from assembly 'System.Runtime.Tests, Version=11.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'.
at System.Reflection.RuntimeAssembly.GetExportedTypes(QCallAssembly assembly, ObjectHandleOnStack retTypes)
at System.Reflection.RuntimeAssembly.GetExportedTypes()
at System.Reflection.Assembly.get_ExportedTypes()
at Xunit.Sdk.ReflectionAssemblyInfo.GetTypes(Boolean includePrivateTypes) in /_/src/xunit.execution/Sdk/Reflection/ReflectionAssemblyInfo.cs:line 80
at Xunit.Sdk.TestCollectionFactoryHelper.GetTestCollectionDefinitions(IAssemblyInfo assemblyInfo, IMessageSink diagnosticMessageSink) in /_/src/xunit.execution/Sdk/Frameworks/TestCollectionFactoryHelper.cs:line 22
The same assembly-load failure was observed before test enumeration on WASI, Firefox, Android, and iOS work items in this build. The failing test types were introduced by #135029 (ea01cd94f644df0c4247f3a1bd995d4edbaf9245), which merged before this source build started. The affected PR changes only System.Net.Quic tests and is unrelated to System.Runtime.Tests.
{
"ErrorMessage": "System.TypeLoadException: Could not load type 'System.Tests.ValueTypeTests+StructWithMutualGenericFieldA' from assembly 'System.Runtime.Tests, Version=11.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'.",
"ErrorPattern": "",
"BuildRetry": false,
"ExcludeConsoleLog": false
}
Build Information
Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1626454
Build error leg or test failing: WasmTestOnWasmtime-CLR-ST-System.Runtime.Tests
Pull request: #134418
KBE authoring guidance (ci-failure-scan)
Error Detailsis for readers. Paste the full exception, stack trace, or build error excerpt so the failure is understandable without opening the raw log.Error Message.ErrorMessageis a case-sensitive ordinalString.Containssubstring copied verbatim from the failing log.BuildRetrytotrueonly for a clear infrastructure retry case.ExcludeConsoleLogdisables Helix console-log scanning.Error Details
The same assembly-load failure was observed before test enumeration on WASI, Firefox, Android, and iOS work items in this build. The failing test types were introduced by #135029 (
ea01cd94f644df0c4247f3a1bd995d4edbaf9245), which merged before this source build started. The affected PR changes only System.Net.Quic tests and is unrelated toSystem.Runtime.Tests.Error Message
{ "ErrorMessage": "System.TypeLoadException: Could not load type 'System.Tests.ValueTypeTests+StructWithMutualGenericFieldA' from assembly 'System.Runtime.Tests, Version=11.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'.", "ErrorPattern": "", "BuildRetry": false, "ExcludeConsoleLog": false }Agentic workflow metadata (ci-failure-scan)
Workflow artifact: ci-failure-scan
Artifact kind: kbe-verification
Verified match count: 2 hits in failure.log
Note
This issue was drafted and filed by GitHub Copilot during Agent Merge CI triage.
Known issue validation
Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1626454
Error message validated:
[System.TypeLoadException: Could not load type 'System.Tests.ValueTypeTests+StructWithMutualGenericFieldA' from assembly 'System.Runtime.Tests, Version=11.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'.]Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 10/7/2026 5:15:12 PM UTC
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Summary