[ci-scan] Test failure: CustomAttributeDecoderTests.TestCustomAttributeDecoderGenericUsingReflection on maccatalyst

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Build Information

Build: https://dev.azure.com/dnceng-public/public/_build/results?buildId=1429323
Build error leg or test failing: maccatalyst-arm64 Release AllSubsets_CoreCLR - System.Reflection.Metadata.Tests

Error Details

CustomAttributeDecoderTests.TestCustomAttributeDecoderGenericUsingReflection fails on maccatalyst-arm64 (AllSubsets_CoreCLR) with System.ArgumentOutOfRangeException in CustomAttributeTypeProvider.GetUnderlyingEnumType. The test relies on reflection-based enum type resolution that behaves differently on mobile CoreCLR.

[FAIL] System.Reflection.Metadata.Decoding.Tests.CustomAttributeDecoderTests.TestCustomAttributeDecoderGenericUsingReflection
System.ArgumentOutOfRangeException : Specified argument was out of the range of valid values.
   at System.Reflection.Metadata.Decoding.Tests.CustomAttributeDecoderTests.CustomAttributeTypeProvider.GetUnderlyingEnumType(String type)
   at System.Reflection.Metadata.Ecma335.CustomAttributeDecoder`1.DecodeFixedArgumentType(BlobReader& signatureReader, BlobReader genericContextReader, Boolean isElementType)
   at System.Reflection.Metadata.Ecma335.CustomAttributeDecoder`1.DecodeFixedArguments(BlobReader& signatureReader, BlobReader& valueReader, Int32 count, BlobReader genericContextReader)

Affected legs:

• runtime-extra-platforms (def 154): maccatalyst-arm64 Release AllSubsets_CoreCLR

First build it occurred: 1425947 (2026-05-19). 3 occurrences in scanned window.

In-flight fix: #128409

Error Message

{
  "ErrorMessage": ["TestCustomAttributeDecoderGenericUsingReflection", "System.ArgumentOutOfRangeException : Specified argument was out of the range of valid values."],
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Note

🔒 Integrity filter blocked 1 item

The following item was blocked because it doesn't meet the GitHub integrity level.

• #125825 search_issues: has lower integrity than agent requires. The agent cannot read data with integrity below "approved".

To allow these resources, lower min-integrity in your GitHub frontmatter:

tools:
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    min-integrity: approved  # merged | approved | unapproved | none

Generated by CI Outer-Loop Failure Scanner · ● 44.4M · ◷

Report

Build	Definition	Test	Pull Request
1432621	dotnet/runtime	System.Reflection.Metadata.Decoding.Tests.CustomAttributeDecoderTests.TestCustomAttributeDecoderGenericUsingReflection
1431538	dotnet/runtime	System.Reflection.Metadata.Decoding.Tests.CustomAttributeDecoderTests.TestCustomAttributeDecoderGenericUsingReflection	#128409
1431552	dotnet/runtime	System.Reflection.Metadata.Decoding.Tests.CustomAttributeDecoderTests.TestCustomAttributeDecoderGenericUsingReflection	#128408
1431370	dotnet/runtime	System.Reflection.Metadata.Decoding.Tests.CustomAttributeDecoderTests.TestCustomAttributeDecoderGenericUsingReflection	#125437
1430925	dotnet/runtime	System.Reflection.Metadata.Tests.WorkItemExecution

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
4	5	5

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