Test failure: System.Net.WebSockets.Client.Tests.ConnectTest_SharedHandler_Loopback.ConnectAsync_CancellationRequestedAfterConnect_ThrowsOperationCanceledException

[VincentBu]

Failed in: runtime-coreclr libraries-jitstressregs 20260830.1

Failed tests:

net11.0-windows-Release-x86-jitstressregs8-Windows.10.Amd64.Open
- System.Net.WebSockets.Client.Tests.ConnectTest_SharedHandler_Loopback.ConnectAsync_CancellationRequestedAfterConnect_ThrowsOperationCanceledException

Error message:

System.Net.Sockets.SocketException : An existing connection was forcibly closed by the remote host.

Stack trace:

at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.System.Threading.Tasks.Sources.IValueTaskSource<System.Net.Sockets.Socket>.GetResult(Int16 token) in /_/src/libraries/System.Net.Sockets/src/System/Net/Sockets/Socket.Tasks.cs:line 1287
   at System.Runtime.CompilerServices.AsyncHelpers.ValueTaskSourceContinuation.GetResult[T](Object source, Int16 token, Byte& result) in /_/src/coreclr/System.Private.CoreLib/src/System/Runtime/CompilerServices/AsyncHelpers.ValueTaskSourceContinuation.cs:line 77
   at System.Runtime.CompilerServices.AsyncHelpers.ValueTaskSourceContinuation.GetResult(Byte& returnValue) in /_/src/coreclr/System.Private.CoreLib/src/System/Runtime/CompilerServices/AsyncHelpers.ValueTaskSourceContinuation.cs:line 33
   at System.Net.Sockets.Socket.AcceptAsync() in /_/src/libraries/System.Net.Sockets/src/System/Net/Sockets/Socket.Tasks.cs:line 32
   at System.Net.Test.Common.LoopbackServer.EstablishConnectionAsync() in /_/src/libraries/Common/tests/System/Net/Http/LoopbackServer.cs:line 142
   at System.Net.Test.Common.LoopbackServer.EstablishConnectionAsync() in /_/src/libraries/Common/tests/System/Net/Http/LoopbackServer.cs:line 162
   at System.Net.Test.Common.LoopbackServer.AcceptConnectionAsync(Func`2 funcAsync) in /_/src/libraries/Common/tests/System/Net/Http/LoopbackServer.cs:line 168
   at System.Net.WebSockets.Client.Tests.ConnectTest_SharedHandler_Loopback.<>c__DisplayClass4_0.<ConnectAsync_CancellationRequestedAfterConnect_ThrowsOperationCanceledException>b__1(LoopbackServer server) in /_/src/libraries/System.Net.WebSockets.Client/tests/ConnectTest.SharedHandler.cs:line 83
   at System.Threading.Tasks.TaskTimeoutExtensions.GetRealException(Task task) in /_/src/libraries/Common/tests/System/Threading/Tasks/TaskTimeoutExtensions.cs:line 119
--- 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 89
   at System.Net.Test.Common.LoopbackServer.<>c__DisplayClass15_0.<CreateClientAndServerAsync>b__0(LoopbackServer server) in /_/src/libraries/Common/tests/System/Net/Http/LoopbackServer.cs:line 123
   at System.Runtime.CompilerServices.RuntimeAsyncTaskContinuation.GetResult(Task task, Byte& result) in /_/src/coreclr/System.Private.CoreLib/src/System/Runtime/CompilerServices/RuntimeAsyncTaskContinuation.cs:line 131
   at System.Runtime.CompilerServices.RuntimeAsyncTaskContinuation.GetResult(Byte& returnValue) in /_/src/coreclr/System.Private.CoreLib/src/System/Runtime/CompilerServices/RuntimeAsyncTaskContinuation.cs:line 114
   at System.Net.Test.Common.LoopbackServer.CreateServerAsync(Func`2 funcAsync, Options options) in /_/src/libraries/Common/tests/System/Net/Http/LoopbackServer.cs:line 107
   at System.Net.WebSockets.Client.Tests.ConnectTest_SharedHandler_Loopback.ConnectAsync_CancellationRequestedAfterConnect_ThrowsOperationCanceledException() in /_/src/libraries/System.Net.WebSockets.Client/tests/ConnectTest.SharedHandler.cs:line 63
--- End of stack trace from previous location ---

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