System.Collections.Concurrent.Tests.ConcurrentStackTests.ManyConcurrentAddsTakes_ForceContentionWithToArray

[karelz]

Last 30 days in Runfo as of 9/14:

Day	Run	Details
9/12	Rolling run 13766	net7.0-tvOS-Release-arm64-Mono_Release-OSX.1100.Amd64.AppleTV.Open
~8/23	Rolling run 1961839	net7.0-tvOS-Release-arm64-Mono_Release-OSX.1100.Amd64.AppleTV.Open

Error (example of Test Results):

System.NullReferenceException : Object reference not set to an instance of an object
   at System.Runtime.Intrinsics.Vector128`1[[System.Int32, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].get_Count()
   at System.SpanHelpers.IndexOfValueType[Int32,DontNegate`1](Int32& searchSpace, Int32 value, Int32 length)
   at System.Array.IndexOf[Int32](Int32[] array, Int32 value, Int32 startIndex, Int32 count)
   at System.Array.InternalArray__ICollection_Contains[Int32](Int32 item)
   at System.Collections.Concurrent.Tests.ProducerConsumerCollectionTests.ManyConcurrentAddsTakes_ForceContentionWithToArray(Double seconds)
   at System.Reflection.MethodInvoker.InterpretedInvoke(Object obj, Span`1 args, BindingFlags invokeAttr)

Tagging subscribers to 'os-tvos': @steveisok, @akoeplinger
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Issue Details

---

Last 30 days in Runfo as of 9/14:

Day	Run	Details
9/12	13766	net7.0-tvOS-Release-arm64-Mono_Release-OSX.1100.Amd64.AppleTV.Open
~8/23	1961839	net7.0-tvOS-Release-arm64-Mono_Release-OSX.1100.Amd64.AppleTV.Open

Error (example of Test Results):

System.NullReferenceException : Object reference not set to an instance of an object
   at System.Runtime.Intrinsics.Vector128`1[[System.Int32, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].get_Count()
   at System.SpanHelpers.IndexOfValueType[Int32,DontNegate`1](Int32& searchSpace, Int32 value, Int32 length)
   at System.Array.IndexOf[Int32](Int32[] array, Int32 value, Int32 startIndex, Int32 count)
   at System.Array.InternalArray__ICollection_Contains[Int32](Int32 item)
   at System.Collections.Concurrent.Tests.ProducerConsumerCollectionTests.ManyConcurrentAddsTakes_ForceContentionWithToArray(Double seconds)
   at System.Reflection.MethodInvoker.InterpretedInvoke(Object obj, Span`1 args, BindingFlags invokeAttr)

Author:	karelz
Assignees:	-
Labels:	area-System.Collections, os-tvos
Milestone:	-

[steveisok]

/cc @SamMonoRT

I think this might be a flake. Hard to tell exactly what triggers it without a real deep dive.