[Test Failure] WinHTTP: System.Net.Http.Functional.Tests.PlatformHandler_HttpClientHandler_Http2_Test.SendAsync_RequestWithLatin1HeaderValue_Succeeds

[MichalStrehovsky]

This looks related to #126867 but that one explicitly lists the test name in the error pattern so I guess we want per test granularity.

[FAIL] System.Net.Http.Functional.Tests.PlatformHandler_HttpClientHandler_Http2_Test.SendAsync_RequestWithLatin1HeaderValue_Succeeds(safeChar: 0x00a0, headerType: Request)
System.Net.Http.HttpRequestException : Error while copying content to a stream.
---- System.IO.IOException : The read operation failed, see inner exception.
-------- System.Net.Http.WinHttpException : Error 12030 calling WINHTTP_CALLBACK_STATUS_REQUEST_ERROR, 'The connection with the server was terminated abnormally'.
   at System.Net.Http.HttpContent.LoadIntoBufferAsyncCore(Task, HttpContent.LimitArrayPoolWriteStream) in /_/src/libraries/System.Net.Http/src/System/Net/Http/HttpContent.cs:line 524
   at System.Net.Http.HttpClient.<SendAsync>g__Core|83_0(HttpRequestMessage, HttpCompletionOption, CancellationTokenSource, Boolean, CancellationTokenSource, CancellationToken) in /_/src/libraries/System.Net.Http/src/System/Net/Http/HttpClient.cs:line 556

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1501326
Build error leg or test failing: System.Net.Http.Functional.Tests.PlatformHandler_HttpClientHandler_Http2_Test.SendAsync_RequestWithLatin1HeaderValue_Succeeds
Pull request: #130405

Error Message

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Fill the error message using step by step known issues guidance.

{
  "ErrorMessage": ["[FAIL] System.Net.Http.Functional.Tests.PlatformHandler_HttpClientHandler_Http2_Test.SendAsync_RequestWithLatin1HeaderValue_Succeeds", "WINHTTP_CALLBACK_STATUS_REQUEST_ERROR"],
  "ErrorPattern": "",
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1501326
Error message validated: [[FAIL] System.Net.Http.Functional.Tests.PlatformHandler_HttpClientHandler_Http2_Test.SendAsync_RequestWithLatin1HeaderValue_Succeeds WINHTTP_CALLBACK_STATUS_REQUEST_ERROR]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 7/10/2026 2:31:25 AM UTC

Report

Build	Repository	Test	Pull Request
1501326	dotnet/runtime	System.Net.Http.Functional.Tests.PlatformHandler_HttpClientHandler_Http2_Test.SendAsync_RequestWithLatin1HeaderValue_Succeeds	#130405

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
0	1	1

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