.packages/microsoft.dotnet.helix.sdk/6.0.0-beta.24113.1/tools/Microsoft.DotNet.Helix.Sdk.MultiQueue.targets(78,5): error : (NETCORE_ENGINEERING_TELEMETRY=Test) Work item PayloadGroup0 in job ea9e65b0-0a19-4a95-8a08-7ab8991b59a0 has failed.
Failure log: https://helix.dot.net/api/2019-06-17/jobs/ea9e65b0-0a19-4a95-8a08-7ab8991b59a0/workitems/PayloadGroup0/console

.packages\microsoft.dotnet.helix.sdk\6.0.0-beta.24113.1\tools\azure-pipelines\AzurePipelines.MultiQueue.targets(43,5): error : (NETCORE_ENGINEERING_TELEMETRY=Test) Test System.Net.Http.WinHttpHandlerFunctional.Tests.BidirectionStreamingTest.AfterReadResponseServerError_ClientWrite has failed. Check the Test tab or this console log: https://helix.dot.net/api/2019-06-17/jobs/3e614ba9-7a01-40fe-b922-477691c1b3d0/workitems/System.Net.Http.WinHttpHandler.Functional.Tests/console

.packages/microsoft.dotnet.helix.sdk/6.0.0-beta.24113.1/tools/azure-pipelines/AzurePipelines.MultiQueue.targets(43,5): error : (NETCORE_ENGINEERING_TELEMETRY=Test) Test System.Net.Http.Functional.Tests.SyncHttpHandler_HttpClientHandler_Authentication_Test.Credentials_ServerChallengesWithWindowsAuth_ClientSendsWindowsAuthHeader has failed. Check the Test tab or this console log: https://helix.dot.net/api/2019-06-17/jobs/7b6246ac-d401-45f0-b0e7-40838015a818/workitems/System.Net.Http.Functional.Tests/console

.packages/microsoft.dotnet.helix.sdk/6.0.0-beta.24113.1/tools/azure-pipelines/AzurePipelines.MultiQueue.targets(43,5): error : (NETCORE_ENGINEERING_TELEMETRY=Test) Test System.Net.Http.Functional.Tests.SocketsHttpHandler_HttpClientHandler_Authentication_Test.Credentials_ServerChallengesWithWindowsAuth_ClientSendsWindowsAuthHeader has failed. Check the Test tab or this console log: https://helix.dot.net/api/2019-06-17/jobs/7b6246ac-d401-45f0-b0e7-40838015a818/workitems/System.Net.Http.Functional.Tests/console

Process terminated. Assertion failed.
   at System.Text.StringBuilder.AssertInvariants()
   at System.Text.StringBuilder.ToString()
   at Tracing.Tests.Common.Utils.RunSubprocess(Assembly currentAssembly, Dictionary`2 environment, Func`1 beforeExecution, Func`2 duringExecution, Func`1 afterExecution)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext(Thread threadPoolThread)
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(IAsyncStateMachineBox box, Boolean allowInlining)
   at System.Threading.Tasks.Task.RunContinuations(Object continuationObject)
   at System.Threading.Tasks.Task.FinishContinuations()
   at System.Threading.Tasks.Task`1.TrySetResult(TResult result)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.SetExistingTaskResult(Task`1 task, TResult result)
   at Tracing.Tests.ReverseValidation.ReverseValidation.<>c__DisplayClass0_0.<<TEST_RuntimeIsResilientToServerClosing>b__0>d.MoveNext()
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext(Thread threadPoolThread)
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(IAsyncStateMachineBox box, Boolean allowInlining)
   at System.Threading.Tasks.Task.RunContinuations(Object continuationObject)
   at System.Threading.Tasks.Task.FinishContinuations()
   at System.Threading.Tasks.Task`1.TrySetResult(TResult result)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.SetExistingTaskResult(Task`1 task, TResult result)
   at Tracing.Tests.Common.ReverseServer.CreateServerAndReceiveAdvertisement(String serverAddress)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext(Thread threadPoolThread)
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(IAsyncStateMachineBox box, Boolean allowInlining)
   at System.Threading.Tasks.Task.RunContinuations(Object continuationObject)
   at System.Threading.Tasks.Task.FinishContinuations()
   at System.Threading.Tasks.Task`1.TrySetResult(TResult result)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.SetExistingTaskResult(Task`1 task, TResult result)
   at Tracing.Tests.Common.ReverseServer.AcceptAsync()
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1.MoveNext(Thread threadPoolThread)
   at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(IAsyncStateMachineBox box, Boolean allowInlining)
   at System.Threading.Tasks.Task.RunContinuations(Object continuationObject)
   at System.Threading.Tasks.Task.FinishContinuations()
   at System.Threading.Tasks.Task`1.TrySetResult(TResult result)
   at System.Threading.Tasks.ValueTask`1.ValueTaskSourceAsTask.<>c.<.cctor>b__4_0(Object state)
   at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.InvokeContinuation(Action`1 continuation, Object state, Boolean forceAsync, Boolean requiresExecutionContextFlow) in /_/src/libraries/System.Net.Sockets/src/System/Net/Sockets/Socket.Tasks.cs:line 1242
   at System.Net.Sockets.SocketAsyncEngine.System.Threading.IThreadPoolWorkItem.Execute() in /_/src/libraries/System.Net.Sockets/src/System/Net/Sockets/SocketAsyncEngine.Unix.cs:line 230
   at System.Threading.ThreadPoolWorkQueue.Dispatch()
   at System.Threading.PortableThreadPool.WorkerThread.WorkerThreadStart()
   at System.Threading.Thread.StartCallback()
[createdump] task_for_pid(91710) FAILED 5 (os/kern) failure
/private/tmp/hel

The Helix Work Item failed. Often this is due to a test crash or infrastructure failure. See the Helix Test Logs tab in the Results page of Azure DevOps.