Strange exception on `BlobArray` with `yield return`

Code (CSharp):

1.     public struct Test
2.     {
3.         private BlobArray<int> BlobArray;
4.      
5.         public IEnumerable<int> Yield()
6.         {
7.             yield return 0;
8.         }
9.     }

This block of code make unity throw an exception and stop compiling in Editor.
A `return` without `yield` would be fine through.

Code (csharp):

1.  
2. Something went wrong while Post Processing the assembly (EntitiesBT.Runtime.dll) :
3.  Index was out of range. Must be non-negative and less than the size of the collection.
4. Parameter name: index
5.   at System.ThrowHelper.ThrowArgumentOutOfRangeException (System.ExceptionArgument argument, System.ExceptionResource resource) [0x00029] in <437ba245d8404784b9fbab9b439ac908>:0
6.   at System.ThrowHelper.ThrowArgumentOutOfRangeException () [0x00000] in <437ba245d8404784b9fbab9b439ac908>:0
7.   at System.Collections.Generic.List`1[T].get_Item (System.Int32 index) [0x00009] in <437ba245d8404784b9fbab9b439ac908>:0
8.   at Unity.Entities.CodeGen.CecilHelpers.FindBestSequencePointFor (Mono.Cecil.MethodDefinition method, Mono.Cecil.Cil.Instruction instruction) [0x00047] in /Users/quabug/proj/EntitiesBehaviorTree/EntityBehaviorTreeExample/Library/PackageCache/com.unity.entities@0.8.0-preview.8/Unity.Entities.CodeGen/CecilHelpers.cs:73
9. rError.MakeError (System.String errorCode, System.String messageData, Mono.Cecil.MethodDefinition method, Mono.Cecil.Cil.Instruction instruction) [0x00001] in /Users/quabug/proj/EntitiesBehaviorTree/EntityBehaviorTreeExample/Library/PackageCache/com.unity.entities@0.8.0-preview.8/Unity.Entities.CodeGen/LambdaJobs/UserError.cs:346
10.   at Unity.Entities.CodeGen.BlobAssetSafetyVerifier.VerifyMethod (Mono.Cecil.MethodDefinition method, System.Collections.Generic.HashSet`1[T] _nonRestrictedTypes) [0x001ee] in /Users/quabug/proj/EntitiesBehaviorTree/EntityBehaviorTreeExample/Library/PackageCache/com.unity.entities@0.8.0-preview.8/Unity.Entities.CodeGen/BlobAssetSafety/BlobAssetSafetyVerifier.cs:137
11.   at Unity.Entities.CodeGen.BlobAssetSafetyVerifier.AssertNoBlobAssetLeavesBlobAssetStorage () [0x00063] in /Users/quabug/proj/EntitiesBehaviorTree/EntityBehaviorTreeExample/Library/PackageCache/com.unity.entities@0.8.0-preview.8/Unity.Entities.CodeGen/BlobAssetSafety/BlobAssetSafetyVerifier.cs:39
12.   at Unity.Entities.CodeGen.BlobAssetSafetyVerifier.PostProcessImpl () [0x0000a] in /Users/quabug/proj/EntitiesBehaviorTree/EntityBehaviorTreeExample/Library/PackageCache/com.unity.entities@0.8.0-preview.8/Unity.Entities.CodeGen/BlobAssetSafety/BlobAssetSafetyVerifier.cs:22
13.   at Unity.Entities.CodeGen.EntitiesILPostProcessor.PostProcess (Mono.Cecil.AssemblyDefinition assemblyDefinition, System.Boolean& madeAChange) [0x00009] in /Users/quabug/proj/EntitiesBehaviorTree/EntityBehaviorTreeExample/Library/PackageCache/com.unity.entities@0.8.0-preview.8/Unity.Entities.CodeGen/EntitiesILPostProcessor.cs:231
14.   at Unity.Entities.CodeGen.EntitiesILPostProcessors.Process (Unity.CompilationPipeline.Common.ILPostProcessing.ICompiledAssembly compiledAssembly) [0x0004b] in /Users/quabug/proj/EntitiesBehaviorTree/EntityBehaviorTreeExample/Library/PackageCache/com.unity.entities@0.8.0-preview.8/Unity.Entities.CodeGen/EntitiesILPostProcessor.cs:44
15.   at UnityEditor.Scripting.ScriptCompilation.ILPostProcessing.RunILPostProcessors (UnityEditor.Scripting.ScriptCompilation.ScriptAssembly assembly, System.String outputTempPath) [0x0011b] in /Users/builduser/buildslave/unity/build/Editor/Mono/Scripting/ScriptCompilation/ILPostProcessing.cs:209
16.   at UnityEditor.Scripting.ScriptCompilation.ILPostProcessing.PostProcess (UnityEditor.Scripting.ScriptCompilation.ScriptAssembly assembly, System.Collections.Generic.List`1[T] messages, System.String outputTempPath) [0x00061] in /Users/builduser/buildslave/unity/build/Editor/Mono/Scripting/ScriptCompilation/ILPostProcessing.cs:99
17.