"System.InvalidProgramException : Common Language Runtime detected an invalid program." when running some tests

I’m seeing errors similar to this one since 2.0.0-ci-20180325225037:

Failed   Product.MacroService.Tests.Concept.ConceptServiceTests.GetPersonConceptSummaryTest
Error Message:
 System.InvalidProgramException : Common Language Runtime detected an invalid program.
Stack Trace:
   at Product.MacroService.Concept.Services.ConceptService.<>c.<CalculateConceptFields>b__4_0(Part p)
   at System.Linq.Enumerable.WhereListIterator`1.ToList()
   at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
   at Product.MacroService.Concept.Services.ConceptService.CalculateImmunizationFields(PersonConceptSummary summary)
   at Product.MacroService.Concept.Services.ConceptService.<GetPersonConceptSummary>d__3.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Product.MacroService.Tests.Concept.ConceptServiceTests.<GetPersonConceptSummaryTest>d__4.MoveNext() in /mnt/c/git/product/macroservice/test/Product.MacroService.Tests/Concept/ConceptServiceTests.cs:line 71
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()

I’m not sure if it helps, but every failure is with something working with System.Collections.Generic.List or System.Linq.Enumerable.

My development environment is Windows 10/WSL with an up-to-date Ubuntu 16.04 installation. I’m using .NET Core 2.0.0.

[SapientGuardian]

I do not have the issue with 2.0.0-ci-20180517205544

[lucaslorentz]

@saxonww @Valeriy1991 @SapientGuardian Can you please check if you have same issue with version 2.0.0-ci-20180517205544?