HTTP/3 Test Failure: SocketsHttpHandler_DiagnosticsTest_Http3.SendAsync_ExpectedDiagnosticCancelledLogging

[antonfirsov]

I want to move on merging #104641 noting this test failure. It seems unrelated to diagnostic aspects.

Child exception:
  Xunit.Sdk.ThrowsException: Assert.Throws() Failure: Exception type was not an exact match
Expected: typeof(System.Net.Quic.QuicException)
Actual:   typeof(System.NullReferenceException)
   at System.Net.Test.Common.Http3LoopbackConnection.WaitForClientDisconnectAsync(Boolean refuseNewRequests) in /_/src/libraries/Common/tests/System/Net/Http/Http3LoopbackConnection.cs:line 318
   at System.Net.Test.Common.Http3LoopbackConnection.ShutdownAsync(Boolean failCurrentRequest) in /_/src/libraries/Common/tests/System/Net/Http/Http3LoopbackConnection.cs:line 286
   at System.Net.Test.Common.Http3LoopbackServer.AcceptConnectionAsync(Func`2 funcAsync) in /_/src/libraries/Common/tests/System/Net/Http/Http3LoopbackServer.cs:line 91
   at System.Net.Test.Common.Http3LoopbackServer.AcceptConnectionAsync(Func`2 funcAsync) in /_/src/libraries/Common/tests/System/Net/Http/Http3LoopbackServer.cs:line 91
   at System.Net.Http.Functional.Tests.DiagnosticsTest.<>c__DisplayClass10_1.<<SendAsync_ExpectedDiagnosticCancelledLogging>b__3>d.MoveNext() in /_/src/libraries/System.Net.Http/tests/FunctionalTests/DiagnosticsTests.cs:line 276
--- End of stack trace from previous location ---
   at System.Threading.Tasks.TaskTimeoutExtensions.GetRealException(Task task) in /_/src/libraries/Common/tests/System/Threading/Tasks/TaskTimeoutExtensions.cs:line 120
--- End of stack trace from previous location ---
   at System.Threading.Tasks.TaskTimeoutExtensions.WhenAllOrAnyFailed(Task[] tasks) in /_/src/libraries/Common/tests/System/Threading/Tasks/TaskTimeoutExtensions.cs:line 90
   at System.Net.Test.Common.LoopbackServerFactory.<>c__DisplayClass6_0.<<CreateClientAndServerAsync>b__0>d.MoveNext() in /_/src/libraries/Common/tests/System/Net/Http/GenericLoopbackServer.cs:line 44
--- End of stack trace from previous location ---
   at System.Net.Test.Common.Http3LoopbackServerFactory.CreateServerAsync(Func`3 funcAsync, Int32 millisecondsTimeout, GenericLoopbackOptions options) in /_/src/libraries/Common/tests/System/Net/Http/Http3LoopbackServer.cs:line 115
   at System.Net.Http.Functional.Tests.DiagnosticsTest.<>c.<<SendAsync_ExpectedDiagnosticCancelledLogging>b__10_0>d.MoveNext() in /_/src/libraries/System.Net.Http/tests/FunctionalTests/DiagnosticsTests.cs:line 269
--- End of stack trace from previous location ---
   at Microsoft.DotNet.RemoteExecutor.Program.Main(String[] args) in /_/src/Microsoft.DotNet.RemoteExecutor/src/Program.cs:line 65

Child process:
  System.Net.Http.Functional.Tests, Version=9.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51 System.Net.Http.Functional.Tests.DiagnosticsTest+<>c System.Threading.Tasks.Task <SendAsync_ExpectedDiagnosticCancelledLogging>b__10_0(System.String, System.String)

Child arguments:
  3.0, True

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