Hang in System.Net.Sockets.Tests.DualModeAccept.AcceptV4BoundToAnyV4_Success on macOS

[danmoseley]

net5.0-OSX-Debug-x64-CoreCLR_release-OSX.1014.Amd64.Open
https://dev.azure.com/dnceng/public/_build/results?buildId=814475&view=ms.vss-test-web.build-test-results-tab&runId=25921516&resultId=180849&paneView=dotnet-dnceng.dnceng-build-release-tasks.helix-test-information-tab

Executed on dci-mac-build-156
+ ./RunTests.sh --runtime-path /tmp/helix/working/B4600A13/p --runtime-path /tmp/helix/working/B4600A13/p
----- start Mon Sep 14 15:27:09 EDT 2020 =============== To repro directly: =====================================================
pushd .
/tmp/helix/working/B4600A13/p/dotnet exec --runtimeconfig System.Net.Sockets.Tests.runtimeconfig.json --depsfile System.Net.Sockets.Tests.deps.json xunit.console.dll System.Net.Sockets.Tests.dll -xml testResults.xml -nologo -nocolor -notrait category=IgnoreForCI -notrait category=OuterLoop -notrait category=failing 
popd
===========================================================================================================
/private/tmp/helix/working/B4600A13/w/B38B0A0D/e /private/tmp/helix/working/B4600A13/w/B38B0A0D/e
  Discovering: System.Net.Sockets.Tests (method display = ClassAndMethod, method display options = None)
  Discovered:  System.Net.Sockets.Tests (found 819 of 1234 test cases)
  Starting:    System.Net.Sockets.Tests (parallel test collections = on, max threads = 12)
    System.Net.Sockets.Tests.CreateSocket.Ctor_Raw_Supported_Success [SKIP]
      Condition(s) not met: "SupportsRawSockets"
   System.Net.Sockets.Tests: [Long Running Test] 'System.Net.Sockets.Tests.DualModeAccept.AcceptV4BoundToAnyV4_Success', Elapsed: 00:02:12
   System.Net.Sockets.Tests: [Long Running Test] 'System.Net.Sockets.Tests.DualModeAccept.AcceptV4BoundToAnyV4_Success', Elapsed: 00:04:13
   System.Net.Sockets.Tests: [Long Running Test] 'System.Net.Sockets.Tests.DualModeAccept.AcceptV4BoundToAnyV4_Success', Elapsed: 00:06:14
   System.Net.Sockets.Tests: [Long Running Test] 'System.Net.Sockets.Tests.DualModeAccept.AcceptV4BoundToAnyV4_Success', Elapsed: 00:08:16
   System.Net.Sockets.Tests: [Long Running Test] 'System.Net.Sockets.Tests.DualModeAccept.AcceptV4BoundToAnyV4_Success', Elapsed: 00:10:16
   System.Net.Sockets.Tests: [Long Running Test] 'System.Net.Sockets.Tests.DualModeAccept.AcceptV4BoundToAnyV4_Success', Elapsed: 00:12:17
   System.Net.Sockets.Tests: [Long Running Test] 'System.Net.Sockets.Tests.DualModeAccept.AcceptV4BoundToAnyV4_Success', Elapsed: 00:14:19

from #42213

No dump, so this is unactionable -- another one waiting for our update to vstest to get dump files from hangs.

[ghost]

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[stephentoub]

so this is unactionable

Closing until it is